Merge branch 'stable-2.15' into stable-2.16

* stable-2.15:
  Upgrade wiremock to 2.20.0
  FileBasedWebSessionCacheTest: Pass test upon invalid key
  Make the index striped locks size configurable
  Bazel: Include eclipse-out directory in .bazelignore
  Add explanatory comment to empty BUILD file(s)
  Update mockito to 2.23.4
  Setup: Replace 'multiply' with 'repeat' in init step
  Setup: Add jgroups skipInterface configuration step
  Setup: Add jgroups protocolStack configuration step
  Configuration: Remove unnecessary usage of 'this'
  Setup: Remove duplication of default auto reindex value
  Setup: Add healthCheck configuration init step
  Setup: Add synchronize event configuration init step
  Setup: Add synchronize configuration step to forwarding sections
  Setup: Call proper method for null subsection cases
  Setup: Remove unused subsection method parameter
  Setup: Add cache pattern configuration init step
  Setup: Rename the number-to-string conversion methods
  Setup: Add autoReindex delay and pollInterval configuration steps
  Setup: Make the http section method name consistent
  Setup: Add init step for autoReindex configuration
  Add missing init step declaration in manifest
  Upgrade bazlets to latest stable-2.15 to build with 2.15.7 API
  FileBasedWebSessionCacheTest: Fix IncompatibleArgumentType error
  Upgrade bazlets to latest stable-2.14 to build with 2.14.17 API
  Harmonize how REST API handlers get a JSON body
  Upgrade bazlets to latest stable-2.15 to build with 2.15.6 API
  Upgrade bazlets to latest stable-2.14 to build with 2.14.16 API
  Align Eclipse compiler settings with core Gerrit's
  WORKSPACE: Make header line space indent consistent
  WORKSPACE: Replace custom local_path with template
  Upgrade wiremock to 2.19.0
  bazlets: Replace native.git_repository with skylark rule
  Harmonize external dependency names to use hyphen
  Upgrade mockito to 2.23.0
  Upgrade bazlets to latest stable-2.15 to build with 2.15.5 API
  Update bazlets to latest stable-2.14 to build with 2.14.15 API
  Update bazlets to latest stable-2.15 to build with 2.15.4 API
  Update bazlets to latest stable-2.14 to build with 2.14.14 API
  Migrate `tools/bazel.rc` to `.bazelrc`
  Update bazlets to latest stable-2.14 to build with 2.14.13 API
  Update bazlets to latest stable-2.14 to use 2.14.12 API
  RestForwarder: Avoid retrying non recoverable exceptions
  Configuration: Fix logging arguments should not require evaluation
  Configuration: Move constants to corresponding classes
  Auto-reindex changes, groups and accounts during startup
  Upgrade wiremock to 2.18.0
  Upgrade mockito to 2.21.0
  Update bazlets to latest stable-2.14 to use 2.14.11 API
  Upgrade bazlets to latest stable-2.15 to use 2.15.3 API

Change-Id: I7c32a40046a443e2c1cd8473402219ae4e6bf0af
diff --git a/.bazelignore b/.bazelignore
new file mode 100644
index 0000000..30f1613
--- /dev/null
+++ b/.bazelignore
@@ -0,0 +1 @@
+eclipse-out
diff --git a/.settings/org.eclipse.jdt.core.prefs b/.settings/org.eclipse.jdt.core.prefs
index c2a4ef5..40e022d 100644
--- a/.settings/org.eclipse.jdt.core.prefs
+++ b/.settings/org.eclipse.jdt.core.prefs
@@ -18,7 +18,7 @@
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
 org.eclipse.jdt.core.compiler.doc.comment.support=enabled
 org.eclipse.jdt.core.compiler.problem.APILeak=warning
-org.eclipse.jdt.core.compiler.problem.annotationSuperInterface=warning
+org.eclipse.jdt.core.compiler.problem.annotationSuperInterface=ignore
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.autoboxing=ignore
 org.eclipse.jdt.core.compiler.problem.comparingIdentical=warning
@@ -35,7 +35,7 @@
 org.eclipse.jdt.core.compiler.problem.fieldHiding=warning
 org.eclipse.jdt.core.compiler.problem.finalParameterBound=warning
 org.eclipse.jdt.core.compiler.problem.finallyBlockNotCompletingNormally=warning
-org.eclipse.jdt.core.compiler.problem.forbiddenReference=error
+org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
 org.eclipse.jdt.core.compiler.problem.hiddenCatchBlock=warning
 org.eclipse.jdt.core.compiler.problem.includeNullInfoFromAsserts=disabled
 org.eclipse.jdt.core.compiler.problem.incompatibleNonInheritedInterfaceMethod=warning
@@ -46,9 +46,9 @@
 org.eclipse.jdt.core.compiler.problem.invalidJavadocTagsDeprecatedRef=enabled
 org.eclipse.jdt.core.compiler.problem.invalidJavadocTagsNotVisibleRef=enabled
 org.eclipse.jdt.core.compiler.problem.invalidJavadocTagsVisibility=private
-org.eclipse.jdt.core.compiler.problem.localVariableHiding=warning
+org.eclipse.jdt.core.compiler.problem.localVariableHiding=ignore
 org.eclipse.jdt.core.compiler.problem.methodWithConstructorName=warning
-org.eclipse.jdt.core.compiler.problem.missingDefaultCase=warning
+org.eclipse.jdt.core.compiler.problem.missingDefaultCase=ignore
 org.eclipse.jdt.core.compiler.problem.missingDeprecatedAnnotation=ignore
 org.eclipse.jdt.core.compiler.problem.missingEnumCaseDespiteDefault=enabled
 org.eclipse.jdt.core.compiler.problem.missingHashCodeMethod=warning
@@ -77,15 +77,15 @@
 org.eclipse.jdt.core.compiler.problem.parameterAssignment=ignore
 org.eclipse.jdt.core.compiler.problem.pessimisticNullAnalysisForFreeTypeVariables=warning
 org.eclipse.jdt.core.compiler.problem.possibleAccidentalBooleanAssignment=warning
-org.eclipse.jdt.core.compiler.problem.potentialNullReference=warning
-org.eclipse.jdt.core.compiler.problem.potentiallyUnclosedCloseable=warning
+org.eclipse.jdt.core.compiler.problem.potentialNullReference=ignore
+org.eclipse.jdt.core.compiler.problem.potentiallyUnclosedCloseable=ignore
 org.eclipse.jdt.core.compiler.problem.rawTypeReference=warning
 org.eclipse.jdt.core.compiler.problem.redundantNullAnnotation=warning
 org.eclipse.jdt.core.compiler.problem.redundantNullCheck=warning
 org.eclipse.jdt.core.compiler.problem.redundantSpecificationOfTypeArguments=warning
 org.eclipse.jdt.core.compiler.problem.redundantSuperinterface=ignore
 org.eclipse.jdt.core.compiler.problem.reportMethodCanBePotentiallyStatic=ignore
-org.eclipse.jdt.core.compiler.problem.reportMethodCanBeStatic=warning
+org.eclipse.jdt.core.compiler.problem.reportMethodCanBeStatic=ignore
 org.eclipse.jdt.core.compiler.problem.specialParameterHidingField=disabled
 org.eclipse.jdt.core.compiler.problem.staticAccessReceiver=warning
 org.eclipse.jdt.core.compiler.problem.suppressOptionalErrors=disabled
@@ -113,7 +113,7 @@
 org.eclipse.jdt.core.compiler.problem.unusedImport=warning
 org.eclipse.jdt.core.compiler.problem.unusedLabel=warning
 org.eclipse.jdt.core.compiler.problem.unusedLocal=warning
-org.eclipse.jdt.core.compiler.problem.unusedObjectAllocation=warning
+org.eclipse.jdt.core.compiler.problem.unusedObjectAllocation=ignore
 org.eclipse.jdt.core.compiler.problem.unusedParameter=warning
 org.eclipse.jdt.core.compiler.problem.unusedParameterIncludeDocCommentReference=enabled
 org.eclipse.jdt.core.compiler.problem.unusedParameterWhenImplementingAbstract=disabled
diff --git a/BUILD b/BUILD
index 7fec2ea..7d5fad8 100644
--- a/BUILD
+++ b/BUILD
@@ -13,6 +13,7 @@
         "Gerrit-PluginName: high-availability",
         "Gerrit-Module: com.ericsson.gerrit.plugins.highavailability.Module",
         "Gerrit-HttpModule: com.ericsson.gerrit.plugins.highavailability.HttpModule",
+        "Gerrit-InitStep: com.ericsson.gerrit.plugins.highavailability.Setup",
         "Implementation-Title: high-availability plugin",
         "Implementation-URL: https://gerrit-review.googlesource.com/#/admin/projects/plugins/high-availability",
     ],
diff --git a/WORKSPACE b/WORKSPACE
index 67d04d8..73b01f5 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -4,7 +4,7 @@
 
 load_bazlets(
     commit = "09a18a88ebdada986d32c1f50581e8734a47939a",
-    #local_path = "/home/ehugare/workspaces/bazlets",
+    #local_path = "/home/<user>/projects/bazlets",
 )
 
 # Snapshot Plugin API
diff --git a/bazlets.bzl b/bazlets.bzl
index f97b72c..f089af4 100644
--- a/bazlets.bzl
+++ b/bazlets.bzl
@@ -1,10 +1,12 @@
+load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
+
 NAME = "com_googlesource_gerrit_bazlets"
 
 def load_bazlets(
         commit,
         local_path = None):
     if not local_path:
-        native.git_repository(
+        git_repository(
             name = NAME,
             remote = "https://gerrit.googlesource.com/bazlets",
             commit = commit,
diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index f3249eb..bca2271 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -3,33 +3,33 @@
 def external_plugin_deps():
     maven_jar(
         name = "wiremock",
-        artifact = "com.github.tomakehurst:wiremock-standalone:2.8.0",
-        sha1 = "b4d91aca283a86b447d3906deac6e1509c3a94c5",
+        artifact = "com.github.tomakehurst:wiremock-standalone:2.20.0",
+        sha1 = "26e5d42ca7af2a9d4b97129595edd0192ad9bd30",
     )
 
     maven_jar(
         name = "mockito",
-        artifact = "org.mockito:mockito-core:2.15.0",
-        sha1 = "b84bfbbc29cd22c9529409627af6ea2897f4fa85",
+        artifact = "org.mockito:mockito-core:2.23.4",
+        sha1 = "a35b6f8ffcfa786771eac7d7d903429e790fdf3f",
         deps = [
-            "@byte_buddy//jar",
-            "@byte_buddy_agent//jar",
+            "@byte-buddy//jar",
+            "@byte-buddy-agent//jar",
             "@objenesis//jar",
         ],
     )
 
-    BYTE_BUDDY_VER = "1.7.9"
+    BYTE_BUDDY_VERSION = "1.9.3"
 
     maven_jar(
-        name = "byte_buddy",
-        artifact = "net.bytebuddy:byte-buddy:" + BYTE_BUDDY_VER,
-        sha1 = "51218a01a882c04d0aba8c028179cce488bbcb58",
+        name = "byte-buddy",
+        artifact = "net.bytebuddy:byte-buddy:" + BYTE_BUDDY_VERSION,
+        sha1 = "f32e510b239620852fc9a2387fac41fd053d6a4d",
     )
 
     maven_jar(
-        name = "byte_buddy_agent",
-        artifact = "net.bytebuddy:byte-buddy-agent:" + BYTE_BUDDY_VER,
-        sha1 = "a6c65f9da7f467ee1f02ff2841ffd3155aee2fc9",
+        name = "byte-buddy-agent",
+        artifact = "net.bytebuddy:byte-buddy-agent:" + BYTE_BUDDY_VERSION,
+        sha1 = "f5b78c16cf4060664d80b6ca32d80dca4bd3d264",
     )
 
     maven_jar(
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/Configuration.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/Configuration.java
index 9313656..8f1963a 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/Configuration.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/Configuration.java
@@ -33,6 +33,7 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
+import java.util.concurrent.TimeUnit;
 import org.eclipse.jgit.lib.Config;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -41,72 +42,17 @@
 public class Configuration {
   private static final Logger log = LoggerFactory.getLogger(Configuration.class);
 
-  // main section
-  static final String MAIN_SECTION = "main";
-  static final String SHARED_DIRECTORY_KEY = "sharedDirectory";
-  static final String DEFAULT_SHARED_DIRECTORY = "shared";
-
-  // peerInfo section
+  // common parameter to peerInfo section
   static final String PEER_INFO_SECTION = "peerInfo";
-  static final String STATIC_SUBSECTION = PeerInfoStrategy.STATIC.name().toLowerCase();
-  static final String JGROUPS_SUBSECTION = PeerInfoStrategy.JGROUPS.name().toLowerCase();
-  static final String URL_KEY = "url";
-  static final String STRATEGY_KEY = "strategy";
-  static final String MY_URL_KEY = "myUrl";
-
-  // jgroups section
-  static final String JGROUPS_SECTION = "jgroups";
-  static final String SKIP_INTERFACE_KEY = "skipInterface";
-  static final String CLUSTER_NAME_KEY = "clusterName";
-  static final String PROTOCOL_STACK_KEY = "protocolStack";
-
-  // http section
-  static final String HTTP_SECTION = "http";
-  static final String USER_KEY = "user";
-  static final String PASSWORD_KEY = "password";
-  static final String CONNECTION_TIMEOUT_KEY = "connectionTimeout";
-  static final String SOCKET_TIMEOUT_KEY = "socketTimeout";
-  static final String MAX_TRIES_KEY = "maxTries";
-  static final String RETRY_INTERVAL_KEY = "retryInterval";
-
-  // cache section
-  static final String CACHE_SECTION = "cache";
-  static final String PATTERN_KEY = "pattern";
-
-  // event section
-  static final String EVENT_SECTION = "event";
-
-  // index section
-  static final String INDEX_SECTION = "index";
 
   // common parameters to cache and index sections
   static final String THREAD_POOL_SIZE_KEY = "threadPoolSize";
-
-  // common parameters to cache, event index and websession sections
-  static final String SYNCHRONIZE_KEY = "synchronize";
-
-  // health check section
-  static final String HEALTH_CHECK_SECTION = "healthCheck";
-  static final String ENABLE_KEY = "enable";
-  static final boolean DEFAULT_HEALTH_CHECK_ENABLED = true;
-
-  // websession section
-  static final String WEBSESSION_SECTION = "websession";
-  static final String CLEANUP_INTERVAL_KEY = "cleanupInterval";
-
-  static final int DEFAULT_TIMEOUT_MS = 5000;
-  static final int DEFAULT_MAX_TRIES = 360;
-  static final int DEFAULT_RETRY_INTERVAL = 10000;
   static final int DEFAULT_THREAD_POOL_SIZE = 4;
-  static final String DEFAULT_CLEANUP_INTERVAL = "24 hours";
-  static final long DEFAULT_CLEANUP_INTERVAL_MS = HOURS.toMillis(24);
-  static final boolean DEFAULT_SYNCHRONIZE = true;
-  static final PeerInfoStrategy DEFAULT_PEER_INFO_STRATEGY = PeerInfoStrategy.STATIC;
-  static final ImmutableList<String> DEFAULT_SKIP_INTERFACE_LIST =
-      ImmutableList.of("lo*", "utun*", "awdl*");
-  static final String DEFAULT_CLUSTER_NAME = "GerritHA";
+  static final String NUM_STRIPED_LOCKS = "numStripedLocks";
+  static final int DEFAULT_NUM_STRIPED_LOCKS = 10;
 
   private final Main main;
+  private final AutoReindex autoReindex;
   private final PeerInfo peerInfo;
   private final JGroups jgroups;
   private final Http http;
@@ -128,6 +74,7 @@
       PluginConfigFactory pluginConfigFactory, @PluginName String pluginName, SitePaths site) {
     Config cfg = pluginConfigFactory.getGlobalPluginConfig(pluginName);
     main = new Main(site, cfg);
+    autoReindex = new AutoReindex(cfg);
     peerInfo = new PeerInfo(cfg);
     switch (peerInfo.strategy()) {
       case STATIC:
@@ -152,6 +99,10 @@
     return main;
   }
 
+  public AutoReindex autoReindex() {
+    return autoReindex;
+  }
+
   public PeerInfo peerInfo() {
     return peerInfo;
   }
@@ -208,6 +159,10 @@
   }
 
   public static class Main {
+    static final String MAIN_SECTION = "main";
+    static final String SHARED_DIRECTORY_KEY = "sharedDirectory";
+    static final String DEFAULT_SHARED_DIRECTORY = "shared";
+
     private final Path sharedDirectory;
 
     private Main(SitePaths site, Config cfg) {
@@ -228,12 +183,59 @@
     }
   }
 
+  public static class AutoReindex {
+
+    static final String AUTO_REINDEX_SECTION = "autoReindex";
+    static final String ENABLED = "enabled";
+    static final String DELAY = "delay";
+    static final String POLL_INTERVAL = "pollInterval";
+    static final boolean DEFAULT_AUTO_REINDEX = false;
+    static final long DEFAULT_DELAY = 10L;
+    static final long DEFAULT_POLL_INTERVAL = 0L;
+
+    private final boolean enabled;
+    private final long delaySec;
+    private final long pollSec;
+
+    public AutoReindex(Config cfg) {
+      enabled = cfg.getBoolean(AUTO_REINDEX_SECTION, ENABLED, DEFAULT_AUTO_REINDEX);
+      delaySec =
+          ConfigUtil.getTimeUnit(
+              cfg, AUTO_REINDEX_SECTION, null, DELAY, DEFAULT_DELAY, TimeUnit.SECONDS);
+      pollSec =
+          ConfigUtil.getTimeUnit(
+              cfg,
+              AUTO_REINDEX_SECTION,
+              null,
+              POLL_INTERVAL,
+              DEFAULT_POLL_INTERVAL,
+              TimeUnit.SECONDS);
+    }
+
+    public boolean enabled() {
+      return enabled;
+    }
+
+    public long delaySec() {
+      return delaySec;
+    }
+
+    public long pollSec() {
+      return pollSec;
+    }
+  }
+
   public static class PeerInfo {
+    static final PeerInfoStrategy DEFAULT_PEER_INFO_STRATEGY = PeerInfoStrategy.STATIC;
+    static final String STRATEGY_KEY = "strategy";
+
     private final PeerInfoStrategy strategy;
 
     private PeerInfo(Config cfg) {
       strategy = cfg.getEnum(PEER_INFO_SECTION, null, STRATEGY_KEY, DEFAULT_PEER_INFO_STRATEGY);
-      log.debug("Strategy: {}", strategy.name());
+      if (log.isDebugEnabled()) {
+        log.debug("Strategy: {}", strategy.name());
+      }
     }
 
     public PeerInfoStrategy strategy() {
@@ -241,7 +243,10 @@
     }
   }
 
-  public class PeerInfoStatic {
+  public static class PeerInfoStatic {
+    static final String STATIC_SUBSECTION = PeerInfoStrategy.STATIC.name().toLowerCase();
+    static final String URL_KEY = "url";
+
     private final String url;
 
     private PeerInfoStatic(Config cfg) {
@@ -257,6 +262,9 @@
   }
 
   public static class PeerInfoJGroups {
+    static final String JGROUPS_SUBSECTION = PeerInfoStrategy.JGROUPS.name().toLowerCase();
+    static final String MY_URL_KEY = "myUrl";
+
     private final String myUrl;
 
     private PeerInfoJGroups(Config cfg) {
@@ -270,6 +278,14 @@
   }
 
   public static class JGroups {
+    static final String JGROUPS_SECTION = "jgroups";
+    static final String SKIP_INTERFACE_KEY = "skipInterface";
+    static final String CLUSTER_NAME_KEY = "clusterName";
+    static final String PROTOCOL_STACK_KEY = "protocolStack";
+    static final ImmutableList<String> DEFAULT_SKIP_INTERFACE_LIST =
+        ImmutableList.of("lo*", "utun*", "awdl*");
+    static final String DEFAULT_CLUSTER_NAME = "GerritHA";
+
     private final ImmutableList<String> skipInterface;
     private final String clusterName;
     private final Optional<Path> protocolStack;
@@ -311,6 +327,18 @@
   }
 
   public static class Http {
+    static final String HTTP_SECTION = "http";
+    static final String USER_KEY = "user";
+    static final String PASSWORD_KEY = "password";
+    static final String CONNECTION_TIMEOUT_KEY = "connectionTimeout";
+    static final String SOCKET_TIMEOUT_KEY = "socketTimeout";
+    static final String MAX_TRIES_KEY = "maxTries";
+    static final String RETRY_INTERVAL_KEY = "retryInterval";
+
+    static final int DEFAULT_TIMEOUT_MS = 5000;
+    static final int DEFAULT_MAX_TRIES = 360;
+    static final int DEFAULT_RETRY_INTERVAL = 10000;
+
     private final String user;
     private final String password;
     private final int connectionTimeout;
@@ -354,6 +382,9 @@
 
   /** Common parameters to cache, event, index and websession */
   public abstract static class Forwarding {
+    static final boolean DEFAULT_SYNCHRONIZE = true;
+    static final String SYNCHRONIZE_KEY = "synchronize";
+
     private final boolean synchronize;
 
     private Forwarding(Config cfg, String section) {
@@ -377,6 +408,9 @@
   }
 
   public static class Cache extends Forwarding {
+    static final String CACHE_SECTION = "cache";
+    static final String PATTERN_KEY = "pattern";
+
     private final int threadPoolSize;
     private final List<String> patterns;
 
@@ -396,30 +430,46 @@
   }
 
   public static class Event extends Forwarding {
+    static final String EVENT_SECTION = "event";
+
     private Event(Config cfg) {
       super(cfg, EVENT_SECTION);
     }
   }
 
   public static class Index extends Forwarding {
+    static final String INDEX_SECTION = "index";
+
     private final int threadPoolSize;
 
+    private final int numStripedLocks;
+
     private Index(Config cfg) {
       super(cfg, INDEX_SECTION);
       threadPoolSize = getInt(cfg, INDEX_SECTION, THREAD_POOL_SIZE_KEY, DEFAULT_THREAD_POOL_SIZE);
+      numStripedLocks = getInt(cfg, INDEX_SECTION, NUM_STRIPED_LOCKS, DEFAULT_NUM_STRIPED_LOCKS);
     }
 
     public int threadPoolSize() {
       return threadPoolSize;
     }
+
+    public int numStripedLocks() {
+      return numStripedLocks;
+    }
   }
 
   public static class Websession extends Forwarding {
+    static final String WEBSESSION_SECTION = "websession";
+    static final String CLEANUP_INTERVAL_KEY = "cleanupInterval";
+    static final String DEFAULT_CLEANUP_INTERVAL = "24 hours";
+    static final long DEFAULT_CLEANUP_INTERVAL_MS = HOURS.toMillis(24);
+
     private final long cleanupInterval;
 
     private Websession(Config cfg) {
       super(cfg, WEBSESSION_SECTION);
-      this.cleanupInterval =
+      cleanupInterval =
           ConfigUtil.getTimeUnit(
               Strings.nullToEmpty(cfg.getString(WEBSESSION_SECTION, null, CLEANUP_INTERVAL_KEY)),
               DEFAULT_CLEANUP_INTERVAL_MS,
@@ -432,6 +482,10 @@
   }
 
   public static class HealthCheck {
+    static final String HEALTH_CHECK_SECTION = "healthCheck";
+    static final String ENABLE_KEY = "enable";
+    static final boolean DEFAULT_HEALTH_CHECK_ENABLED = true;
+
     private final boolean enabled;
 
     private HealthCheck(Config cfg) {
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/Module.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/Module.java
index f9155da..744fac9 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/Module.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/Module.java
@@ -14,6 +14,7 @@
 
 package com.ericsson.gerrit.plugins.highavailability;
 
+import com.ericsson.gerrit.plugins.highavailability.autoreindex.AutoReindexModule;
 import com.ericsson.gerrit.plugins.highavailability.cache.CacheModule;
 import com.ericsson.gerrit.plugins.highavailability.event.EventModule;
 import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwarderModule;
@@ -50,6 +51,9 @@
     if (config.index().synchronize()) {
       install(new IndexModule());
     }
+    if (config.autoReindex().enabled()) {
+      install(new AutoReindexModule());
+    }
     install(new PeerInfoModule(config.peerInfo().strategy()));
   }
 
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/Setup.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/Setup.java
index a8241cb..e58f62f 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/Setup.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/Setup.java
@@ -14,33 +14,49 @@
 
 package com.ericsson.gerrit.plugins.highavailability;
 
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.CACHE_SECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.CLEANUP_INTERVAL_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.CLUSTER_NAME_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.CONNECTION_TIMEOUT_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_CLEANUP_INTERVAL;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_CLUSTER_NAME;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_MAX_TRIES;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_RETRY_INTERVAL;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_SHARED_DIRECTORY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.AutoReindex.AUTO_REINDEX_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.AutoReindex.DEFAULT_AUTO_REINDEX;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.AutoReindex.DEFAULT_DELAY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.AutoReindex.DEFAULT_POLL_INTERVAL;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.AutoReindex.DELAY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.AutoReindex.ENABLED;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.AutoReindex.POLL_INTERVAL;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Cache.CACHE_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Cache.PATTERN_KEY;
 import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_THREAD_POOL_SIZE;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_TIMEOUT_MS;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.HTTP_SECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.INDEX_SECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGROUPS_SUBSECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.MAIN_SECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.MAX_TRIES_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.PASSWORD_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Event.EVENT_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Forwarding.DEFAULT_SYNCHRONIZE;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Forwarding.SYNCHRONIZE_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.HealthCheck.DEFAULT_HEALTH_CHECK_ENABLED;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.HealthCheck.ENABLE_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.HealthCheck.HEALTH_CHECK_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.CONNECTION_TIMEOUT_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.DEFAULT_MAX_TRIES;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.DEFAULT_RETRY_INTERVAL;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.DEFAULT_TIMEOUT_MS;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.HTTP_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.MAX_TRIES_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.PASSWORD_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.RETRY_INTERVAL_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.SOCKET_TIMEOUT_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.USER_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Index.INDEX_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGroups.CLUSTER_NAME_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGroups.DEFAULT_CLUSTER_NAME;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGroups.PROTOCOL_STACK_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGroups.SKIP_INTERFACE_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Main.DEFAULT_SHARED_DIRECTORY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Main.MAIN_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Main.SHARED_DIRECTORY_KEY;
 import static com.ericsson.gerrit.plugins.highavailability.Configuration.PEER_INFO_SECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.RETRY_INTERVAL_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.SHARED_DIRECTORY_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.SOCKET_TIMEOUT_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.STATIC_SUBSECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.STRATEGY_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.PeerInfo.STRATEGY_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.PeerInfoJGroups.JGROUPS_SUBSECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.PeerInfoStatic.STATIC_SUBSECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.PeerInfoStatic.URL_KEY;
 import static com.ericsson.gerrit.plugins.highavailability.Configuration.THREAD_POOL_SIZE_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.URL_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.USER_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.WEBSESSION_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Websession.CLEANUP_INTERVAL_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Websession.DEFAULT_CLEANUP_INTERVAL;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Websession.WEBSESSION_SECTION;
 
 import com.ericsson.gerrit.plugins.highavailability.Configuration.PeerInfoStrategy;
 import com.google.common.base.Strings;
@@ -94,10 +110,13 @@
       Path pluginConfigFile = site.etc_dir.resolve(pluginName + ".config");
       config = new FileBasedConfig(pluginConfigFile.toFile(), FS.DETECTED);
       config.load();
-      configureHttp();
+      configureAutoReindexSection();
+      configureHttpSection();
       configureCacheSection();
+      configureEventSection();
       configureIndexSection();
       configureWebsessionsSection();
+      configureHealthCheckSection();
       if (!createHAReplicaSite(config)) {
         configureMainSection();
         configurePeerInfoSection();
@@ -107,6 +126,25 @@
     }
   }
 
+  private void configureAutoReindexSection() {
+    ui.header("AutoReindex section");
+    Boolean autoReindex =
+        promptAndSetBoolean("Auto reindex", AUTO_REINDEX_SECTION, ENABLED, DEFAULT_AUTO_REINDEX);
+    config.setBoolean(AUTO_REINDEX_SECTION, null, ENABLED, autoReindex);
+
+    String delay =
+        promptAndSetString("Delay", AUTO_REINDEX_SECTION, DELAY, numberToString(DEFAULT_DELAY));
+    config.setLong(AUTO_REINDEX_SECTION, null, DELAY, Long.valueOf(delay));
+
+    String pollInterval =
+        promptAndSetString(
+            "Poll interval",
+            AUTO_REINDEX_SECTION,
+            POLL_INTERVAL,
+            numberToString(DEFAULT_POLL_INTERVAL));
+    config.setLong(AUTO_REINDEX_SECTION, null, POLL_INTERVAL, Long.valueOf(pollInterval));
+  }
+
   private void configureMainSection() {
     ui.header("Main section");
     String sharedDirDefault = ui.isBatch() ? DEFAULT_SHARED_DIRECTORY : null;
@@ -134,10 +172,22 @@
           JGROUPS_SUBSECTION,
           CLUSTER_NAME_KEY,
           DEFAULT_CLUSTER_NAME);
+      promptAndSetString(
+          "Protocol stack (optional)",
+          PEER_INFO_SECTION,
+          JGROUPS_SUBSECTION,
+          PROTOCOL_STACK_KEY,
+          null);
+      promptAndSetString(
+          titleForOptionalWithNote("Skip interface", "interfaces"),
+          PEER_INFO_SECTION,
+          JGROUPS_SUBSECTION,
+          SKIP_INTERFACE_KEY,
+          null);
     }
   }
 
-  private void configureHttp() {
+  private void configureHttpSection() {
     ui.header("Http section");
     promptAndSetString("User", HTTP_SECTION, USER_KEY, null);
     promptAndSetString("Password", HTTP_SECTION, PASSWORD_KEY, null);
@@ -145,39 +195,82 @@
         "Max number of tries to forward to remote peer",
         HTTP_SECTION,
         MAX_TRIES_KEY,
-        str(DEFAULT_MAX_TRIES));
+        numberToString(DEFAULT_MAX_TRIES));
     promptAndSetString(
-        "Retry interval [ms]", HTTP_SECTION, RETRY_INTERVAL_KEY, str(DEFAULT_RETRY_INTERVAL));
+        "Retry interval [ms]",
+        HTTP_SECTION,
+        RETRY_INTERVAL_KEY,
+        numberToString(DEFAULT_RETRY_INTERVAL));
     promptAndSetString(
-        "Connection timeout [ms]", HTTP_SECTION, CONNECTION_TIMEOUT_KEY, str(DEFAULT_TIMEOUT_MS));
+        "Connection timeout [ms]",
+        HTTP_SECTION,
+        CONNECTION_TIMEOUT_KEY,
+        numberToString(DEFAULT_TIMEOUT_MS));
     promptAndSetString(
-        "Socket timeout [ms]", HTTP_SECTION, SOCKET_TIMEOUT_KEY, str(DEFAULT_TIMEOUT_MS));
+        "Socket timeout [ms]",
+        HTTP_SECTION,
+        SOCKET_TIMEOUT_KEY,
+        numberToString(DEFAULT_TIMEOUT_MS));
   }
 
   private void configureCacheSection() {
     ui.header("Cache section");
+    promptAndSetSynchronize("Cache", CACHE_SECTION);
     promptAndSetString(
         "Cache thread pool size",
         CACHE_SECTION,
         THREAD_POOL_SIZE_KEY,
-        str(DEFAULT_THREAD_POOL_SIZE));
+        numberToString(DEFAULT_THREAD_POOL_SIZE));
+    promptAndSetString(
+        titleForOptionalWithNote("Cache pattern", "patterns"), CACHE_SECTION, PATTERN_KEY, null);
+  }
+
+  private void configureEventSection() {
+    ui.header("Event section");
+    promptAndSetSynchronize("Event", EVENT_SECTION);
   }
 
   private void configureIndexSection() {
     ui.header("Index section");
+    promptAndSetSynchronize("Index", INDEX_SECTION);
     promptAndSetString(
         "Index thread pool size",
         INDEX_SECTION,
         THREAD_POOL_SIZE_KEY,
-        str(DEFAULT_THREAD_POOL_SIZE));
+        numberToString(DEFAULT_THREAD_POOL_SIZE));
   }
 
   private void configureWebsessionsSection() {
     ui.header("Websession section");
+    promptAndSetSynchronize("Websession", WEBSESSION_SECTION);
     promptAndSetString(
         "Cleanup interval", WEBSESSION_SECTION, CLEANUP_INTERVAL_KEY, DEFAULT_CLEANUP_INTERVAL);
   }
 
+  private void configureHealthCheckSection() {
+    ui.header("HealthCheck section");
+    Boolean healthCheck =
+        promptAndSetBoolean(
+            "Health check", HEALTH_CHECK_SECTION, ENABLE_KEY, DEFAULT_HEALTH_CHECK_ENABLED);
+    config.setBoolean(HEALTH_CHECK_SECTION, null, ENABLE_KEY, healthCheck);
+  }
+
+  private void promptAndSetSynchronize(String sectionTitle, String section) {
+    String titleSuffix = ": synchronize?";
+    String title = sectionTitle + titleSuffix;
+    promptAndSetBoolean(title, section, SYNCHRONIZE_KEY, DEFAULT_SYNCHRONIZE);
+  }
+
+  private Boolean promptAndSetBoolean(
+      String title, String section, String name, Boolean defaultValue) {
+    Boolean oldValue = config.getBoolean(section, null, name, defaultValue);
+    Boolean newValue = Boolean.parseBoolean(ui.readString(String.valueOf(oldValue), title));
+    if (!Objects.equals(oldValue, newValue)) {
+      config.setBoolean(section, null, name, newValue);
+    }
+    return newValue;
+  }
+
   private String promptAndSetString(
       String title, String section, String name, String defaultValue) {
     return promptAndSetString(title, section, null, name, defaultValue);
@@ -197,8 +290,16 @@
     return newValue;
   }
 
-  private static String str(int n) {
-    return Integer.toString(n);
+  private static String titleForOptionalWithNote(String prefix, String suffix) {
+    return prefix + " (optional); manually repeat this line to configure more " + suffix;
+  }
+
+  private static String numberToString(int number) {
+    return Integer.toString(number);
+  }
+
+  private static String numberToString(long number) {
+    return Long.toString(number);
   }
 
   private boolean createHAReplicaSite(FileBasedConfig pluginConfig)
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/SetupLocalHAReplica.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/SetupLocalHAReplica.java
index ddbd994..b5c9730 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/SetupLocalHAReplica.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/SetupLocalHAReplica.java
@@ -14,14 +14,14 @@
 
 package com.ericsson.gerrit.plugins.highavailability;
 
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.CLUSTER_NAME_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_CLUSTER_NAME;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_SHARED_DIRECTORY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGROUPS_SUBSECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.MAIN_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGroups.CLUSTER_NAME_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGroups.DEFAULT_CLUSTER_NAME;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Main.DEFAULT_SHARED_DIRECTORY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Main.MAIN_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Main.SHARED_DIRECTORY_KEY;
 import static com.ericsson.gerrit.plugins.highavailability.Configuration.PEER_INFO_SECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.SHARED_DIRECTORY_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.STRATEGY_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.PeerInfo.STRATEGY_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.PeerInfoJGroups.JGROUPS_SUBSECTION;
 
 import com.google.common.collect.ImmutableList;
 import com.google.gerrit.common.FileUtil;
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/AccountReindexRunnable.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/AccountReindexRunnable.java
new file mode 100644
index 0000000..da52555
--- /dev/null
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/AccountReindexRunnable.java
@@ -0,0 +1,71 @@
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.ericsson.gerrit.plugins.highavailability.autoreindex;
+
+import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedIndexAccountHandler;
+import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedIndexingHandler.Operation;
+import com.ericsson.gerrit.plugins.highavailability.forwarder.rest.AbstractIndexRestApiServlet;
+import com.google.gerrit.reviewdb.client.Account;
+import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.account.AccountState;
+import com.google.gerrit.server.account.Accounts;
+import com.google.gerrit.server.util.OneOffRequestContext;
+import com.google.gwtorm.server.OrmException;
+import com.google.inject.Inject;
+import java.io.IOException;
+import java.sql.Timestamp;
+import java.util.Optional;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class AccountReindexRunnable extends ReindexRunnable<AccountState> {
+  private static final Logger log = LoggerFactory.getLogger(AccountReindexRunnable.class);
+
+  private final ForwardedIndexAccountHandler accountIdx;
+
+  private final Accounts accounts;
+
+  @Inject
+  public AccountReindexRunnable(
+      ForwardedIndexAccountHandler accountIdx,
+      IndexTs indexTs,
+      OneOffRequestContext ctx,
+      Accounts accounts) {
+    super(AbstractIndexRestApiServlet.IndexName.ACCOUNT, indexTs, ctx);
+    this.accountIdx = accountIdx;
+    this.accounts = accounts;
+  }
+
+  @Override
+  protected Iterable<AccountState> fetchItems(ReviewDb db) throws Exception {
+    return accounts.all();
+  }
+
+  @Override
+  protected Optional<Timestamp> indexIfNeeded(ReviewDb db, AccountState as, Timestamp sinceTs) {
+    try {
+      Account a = as.getAccount();
+      Timestamp accountTs = a.getRegisteredOn();
+      if (accountTs.after(sinceTs)) {
+        log.info("Index {}/{}/{}/{}", a.getId(), a.getFullName(), a.getPreferredEmail(), accountTs);
+        accountIdx.index(a.getId(), Operation.INDEX, Optional.empty());
+        return Optional.of(accountTs);
+      }
+    } catch (IOException | OrmException e) {
+      log.error("Reindex failed", e);
+    }
+    return Optional.empty();
+  }
+}
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/AutoReindexModule.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/AutoReindexModule.java
new file mode 100644
index 0000000..d4871a7
--- /dev/null
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/AutoReindexModule.java
@@ -0,0 +1,33 @@
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.ericsson.gerrit.plugins.highavailability.autoreindex;
+
+import com.google.gerrit.extensions.events.AccountIndexedListener;
+import com.google.gerrit.extensions.events.ChangeIndexedListener;
+import com.google.gerrit.extensions.events.GroupIndexedListener;
+import com.google.gerrit.extensions.events.LifecycleListener;
+import com.google.gerrit.extensions.registration.DynamicSet;
+import com.google.inject.AbstractModule;
+
+public class AutoReindexModule extends AbstractModule {
+
+  @Override
+  protected void configure() {
+    DynamicSet.bind(binder(), LifecycleListener.class).to(AutoReindexScheduler.class);
+    DynamicSet.bind(binder(), ChangeIndexedListener.class).to(IndexTs.class);
+    DynamicSet.bind(binder(), AccountIndexedListener.class).to(IndexTs.class);
+    DynamicSet.bind(binder(), GroupIndexedListener.class).to(IndexTs.class);
+  }
+}
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/AutoReindexScheduler.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/AutoReindexScheduler.java
new file mode 100644
index 0000000..c0d90d1
--- /dev/null
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/AutoReindexScheduler.java
@@ -0,0 +1,80 @@
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.ericsson.gerrit.plugins.highavailability.autoreindex;
+
+import com.ericsson.gerrit.plugins.highavailability.Configuration;
+import com.google.gerrit.extensions.events.LifecycleListener;
+import com.google.gerrit.server.git.WorkQueue;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Future;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@Singleton
+public class AutoReindexScheduler implements LifecycleListener {
+  private static final Logger log = LoggerFactory.getLogger(AutoReindexScheduler.class);
+  private final Configuration.AutoReindex cfg;
+  private final ChangeReindexRunnable changeReindex;
+  private final AccountReindexRunnable accountReindex;
+  private final GroupReindexRunnable groupReindex;
+  private final ScheduledExecutorService executor;
+  private final List<Future<?>> futureTasks = new ArrayList<>();
+
+  @Inject
+  public AutoReindexScheduler(
+      Configuration cfg,
+      WorkQueue workQueue,
+      ChangeReindexRunnable changeReindex,
+      AccountReindexRunnable accountReindex,
+      GroupReindexRunnable groupReindex) {
+    this.cfg = cfg.autoReindex();
+    this.changeReindex = changeReindex;
+    this.accountReindex = accountReindex;
+    this.groupReindex = groupReindex;
+    this.executor = workQueue.createQueue(1, "HighAvailability-AutoReindex");
+  }
+
+  @Override
+  public void start() {
+    if (cfg.pollSec() > 0) {
+      log.info("Scheduling auto-reindex after {}s and every {}s", cfg.delaySec(), cfg.pollSec());
+      futureTasks.add(
+          executor.scheduleAtFixedRate(
+              changeReindex, cfg.delaySec(), cfg.pollSec(), TimeUnit.SECONDS));
+      futureTasks.add(
+          executor.scheduleAtFixedRate(
+              accountReindex, cfg.delaySec(), cfg.pollSec(), TimeUnit.SECONDS));
+      futureTasks.add(
+          executor.scheduleAtFixedRate(
+              groupReindex, cfg.delaySec(), cfg.pollSec(), TimeUnit.SECONDS));
+    } else {
+      log.info("Scheduling auto-reindex after {}s", cfg.delaySec());
+      futureTasks.add(executor.schedule(changeReindex, cfg.delaySec(), TimeUnit.SECONDS));
+      futureTasks.add(executor.schedule(accountReindex, cfg.delaySec(), TimeUnit.SECONDS));
+      futureTasks.add(executor.schedule(groupReindex, cfg.delaySec(), TimeUnit.SECONDS));
+    }
+  }
+
+  @Override
+  public void stop() {
+    futureTasks.forEach(t -> t.cancel(true));
+    executor.shutdown();
+  }
+}
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/ChangeReindexRunnable.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/ChangeReindexRunnable.java
new file mode 100644
index 0000000..62a9792
--- /dev/null
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/ChangeReindexRunnable.java
@@ -0,0 +1,114 @@
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.ericsson.gerrit.plugins.highavailability.autoreindex;
+
+import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedIndexChangeHandler;
+import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedIndexingHandler.Operation;
+import com.ericsson.gerrit.plugins.highavailability.forwarder.rest.AbstractIndexRestApiServlet;
+import com.google.common.collect.Streams;
+import com.google.gerrit.reviewdb.client.Change;
+import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.git.GitRepositoryManager;
+import com.google.gerrit.server.notedb.ChangeNotes;
+import com.google.gerrit.server.notedb.ChangeNotes.Factory.ChangeNotesResult;
+import com.google.gerrit.server.project.ProjectCache;
+import com.google.gerrit.server.util.OneOffRequestContext;
+import com.google.gwtorm.server.OrmException;
+import com.google.inject.Inject;
+import java.io.IOException;
+import java.sql.Timestamp;
+import java.util.Iterator;
+import java.util.Optional;
+import java.util.stream.Stream;
+import org.eclipse.jgit.lib.Repository;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class ChangeReindexRunnable extends ReindexRunnable<Change> {
+  private static final Logger log = LoggerFactory.getLogger(ChangeReindexRunnable.class);
+
+  private final ForwardedIndexChangeHandler changeIdx;
+
+  private final ProjectCache projectCache;
+
+  private final GitRepositoryManager repoManager;
+
+  private final ChangeNotes.Factory notesFactory;
+
+  private static class StreamIterable implements Iterable<Change> {
+
+    private final Stream<Change> stream;
+
+    public StreamIterable(Stream<Change> stream) {
+      this.stream = stream;
+    }
+
+    @Override
+    public Iterator<Change> iterator() {
+      return stream.iterator();
+    }
+  }
+
+  @Inject
+  public ChangeReindexRunnable(
+      ForwardedIndexChangeHandler changeIdx,
+      IndexTs indexTs,
+      OneOffRequestContext ctx,
+      ProjectCache projectCache,
+      GitRepositoryManager repoManager,
+      ChangeNotes.Factory notesFactory) {
+    super(AbstractIndexRestApiServlet.IndexName.CHANGE, indexTs, ctx);
+    this.changeIdx = changeIdx;
+    this.projectCache = projectCache;
+    this.repoManager = repoManager;
+    this.notesFactory = notesFactory;
+  }
+
+  @Override
+  protected Iterable<Change> fetchItems(ReviewDb db) throws Exception {
+    Stream<Change> allChangesStream = Stream.empty();
+    Iterable<Project.NameKey> projects = projectCache.all();
+    for (Project.NameKey projectName : projects) {
+      try (Repository repo = repoManager.openRepository(projectName)) {
+        Stream<Change> projectChangesStream =
+            notesFactory
+                .scan(repo, db, projectName)
+                .map(
+                    (ChangeNotesResult changeNotes) -> {
+                      return changeNotes.notes().getChange();
+                    });
+        allChangesStream = Streams.concat(allChangesStream, projectChangesStream);
+      }
+    }
+    return new StreamIterable(allChangesStream);
+  }
+
+  @Override
+  protected Optional<Timestamp> indexIfNeeded(ReviewDb db, Change c, Timestamp sinceTs) {
+    try {
+      Timestamp changeTs = c.getLastUpdatedOn();
+      if (changeTs.after(sinceTs)) {
+        log.info(
+            "Index {}/{}/{} was updated after {}", c.getProject(), c.getId(), changeTs, sinceTs);
+        changeIdx.index(c.getProject() + "~" + c.getId(), Operation.INDEX, Optional.empty());
+        return Optional.of(changeTs);
+      }
+    } catch (OrmException | IOException e) {
+      log.error("Reindex failed", e);
+    }
+    return Optional.empty();
+  }
+}
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/GroupReindexRunnable.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/GroupReindexRunnable.java
new file mode 100644
index 0000000..71a0280
--- /dev/null
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/GroupReindexRunnable.java
@@ -0,0 +1,45 @@
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.ericsson.gerrit.plugins.highavailability.autoreindex;
+
+import com.ericsson.gerrit.plugins.highavailability.forwarder.rest.AbstractIndexRestApiServlet;
+import com.google.gerrit.common.data.GroupReference;
+import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.group.db.Groups;
+import com.google.gerrit.server.util.OneOffRequestContext;
+import com.google.inject.Inject;
+import java.sql.Timestamp;
+import java.util.Optional;
+
+public class GroupReindexRunnable extends ReindexRunnable<GroupReference> {
+
+  private final Groups groups;
+
+  @Inject
+  public GroupReindexRunnable(IndexTs indexTs, OneOffRequestContext ctx, Groups groups) {
+    super(AbstractIndexRestApiServlet.IndexName.GROUP, indexTs, ctx);
+    this.groups = groups;
+  }
+
+  @Override
+  protected Iterable<GroupReference> fetchItems(ReviewDb db) throws Exception {
+    return groups.getAllGroupReferences()::iterator;
+  }
+
+  @Override
+  protected Optional<Timestamp> indexIfNeeded(ReviewDb db, GroupReference g, Timestamp sinceTs) {
+    return Optional.empty();
+  }
+}
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/IndexTs.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/IndexTs.java
new file mode 100644
index 0000000..40b4117
--- /dev/null
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/IndexTs.java
@@ -0,0 +1,155 @@
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.ericsson.gerrit.plugins.highavailability.autoreindex;
+
+import com.ericsson.gerrit.plugins.highavailability.forwarder.rest.AbstractIndexRestApiServlet;
+import com.ericsson.gerrit.plugins.highavailability.forwarder.rest.AbstractIndexRestApiServlet.IndexName;
+import com.google.gerrit.extensions.annotations.PluginData;
+import com.google.gerrit.extensions.events.AccountIndexedListener;
+import com.google.gerrit.extensions.events.ChangeIndexedListener;
+import com.google.gerrit.extensions.events.GroupIndexedListener;
+import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.change.ChangeFinder;
+import com.google.gerrit.server.git.WorkQueue;
+import com.google.gerrit.server.notedb.ChangeNotes;
+import com.google.gwtorm.server.OrmException;
+import com.google.gwtorm.server.SchemaFactory;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.ScheduledExecutorService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@Singleton
+public class IndexTs
+    implements ChangeIndexedListener, AccountIndexedListener, GroupIndexedListener {
+  private static final Logger log = LoggerFactory.getLogger(IndexTs.class);
+  private static final DateTimeFormatter formatter = DateTimeFormatter.ISO_DATE_TIME;
+
+  private final Path dataDir;
+  private final ScheduledExecutorService exec;
+  private final FlusherRunner flusher;
+  private final SchemaFactory<ReviewDb> schemaFactory;
+  private final ChangeFinder changeFinder;
+
+  private volatile LocalDateTime changeTs;
+  private volatile LocalDateTime accountTs;
+  private volatile LocalDateTime groupTs;
+
+  class FlusherRunner implements Runnable {
+    private Map<AbstractIndexRestApiServlet.IndexName, LocalDateTime> storedTs = new HashMap<>();
+
+    @Override
+    public void run() {
+      store(AbstractIndexRestApiServlet.IndexName.CHANGE, changeTs);
+      store(AbstractIndexRestApiServlet.IndexName.ACCOUNT, accountTs);
+      store(AbstractIndexRestApiServlet.IndexName.GROUP, groupTs);
+    }
+
+    private void store(AbstractIndexRestApiServlet.IndexName index, LocalDateTime latestTs) {
+      LocalDateTime currTs = storedTs.get(index);
+      if (currTs == null || latestTs.isAfter(currTs)) {
+        Path indexTsFile = dataDir.resolve(index.name().toLowerCase());
+        try {
+          Files.write(indexTsFile, latestTs.format(formatter).getBytes(StandardCharsets.UTF_8));
+          storedTs.put(index, currTs);
+        } catch (IOException e) {
+          log.error("Unable to update last timestamp for index " + index, e);
+        }
+      }
+    }
+  }
+
+  @Inject
+  public IndexTs(
+      @PluginData Path dataDir,
+      WorkQueue queue,
+      SchemaFactory<ReviewDb> schemaFactory,
+      ChangeFinder changeFinder) {
+    this.dataDir = dataDir;
+    this.exec = queue.getDefaultQueue();
+    this.flusher = new FlusherRunner();
+    this.schemaFactory = schemaFactory;
+    this.changeFinder = changeFinder;
+  }
+
+  @Override
+  public void onGroupIndexed(String uuid) {
+    update(IndexName.GROUP, LocalDateTime.now());
+  }
+
+  @Override
+  public void onAccountIndexed(int id) {
+    update(IndexName.ACCOUNT, LocalDateTime.now());
+  }
+
+  @Override
+  public void onChangeIndexed(String projectName, int id) {
+    try (ReviewDb db = schemaFactory.open()) {
+      ChangeNotes changeNotes = changeFinder.findOne(projectName + "~" + id);
+      update(
+          IndexName.CHANGE,
+          changeNotes == null
+              ? LocalDateTime.now()
+              : changeNotes.getChange().getLastUpdatedOn().toLocalDateTime());
+    } catch (OrmException e) {
+      log.warn("Unable to update the latest TS for change {}", e);
+    }
+  }
+
+  @Override
+  public void onChangeDeleted(int id) {
+    update(IndexName.CHANGE, LocalDateTime.now());
+  }
+
+  public Optional<LocalDateTime> getUpdateTs(AbstractIndexRestApiServlet.IndexName index) {
+    try {
+      Path indexTsFile = dataDir.resolve(index.name().toLowerCase());
+      if (indexTsFile.toFile().exists()) {
+        String tsString = Files.readAllLines(indexTsFile).get(0);
+        return Optional.of(LocalDateTime.parse(tsString, formatter));
+      }
+    } catch (Exception e) {
+      log.warn("Unable to read last timestamp for index {}", index, e);
+    }
+    return Optional.empty();
+  }
+
+  void update(AbstractIndexRestApiServlet.IndexName index, LocalDateTime dateTime) {
+    switch (index) {
+      case CHANGE:
+        changeTs = dateTime;
+        break;
+      case ACCOUNT:
+        accountTs = dateTime;
+        break;
+      case GROUP:
+        groupTs = dateTime;
+        break;
+      default:
+        throw new IllegalArgumentException("Unsupported index " + index);
+    }
+    exec.execute(flusher);
+  }
+}
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/ReindexRunnable.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/ReindexRunnable.java
new file mode 100644
index 0000000..7891bbf
--- /dev/null
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/ReindexRunnable.java
@@ -0,0 +1,96 @@
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.ericsson.gerrit.plugins.highavailability.autoreindex;
+
+import com.ericsson.gerrit.plugins.highavailability.forwarder.rest.AbstractIndexRestApiServlet;
+import com.google.common.base.Stopwatch;
+import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.util.ManualRequestContext;
+import com.google.gerrit.server.util.OneOffRequestContext;
+import com.google.inject.Inject;
+import java.sql.Timestamp;
+import java.time.LocalDateTime;
+import java.util.Optional;
+import java.util.concurrent.TimeUnit;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+abstract class ReindexRunnable<T> implements Runnable {
+  private static final Logger log = LoggerFactory.getLogger(ReindexRunnable.class);
+
+  private final AbstractIndexRestApiServlet.IndexName itemName;
+  private final OneOffRequestContext ctx;
+  private final IndexTs indexTs;
+
+  @Inject
+  public ReindexRunnable(
+      AbstractIndexRestApiServlet.IndexName itemName, IndexTs indexTs, OneOffRequestContext ctx) {
+    this.itemName = itemName;
+    this.ctx = ctx;
+    this.indexTs = indexTs;
+  }
+
+  @Override
+  public void run() {
+    Optional<LocalDateTime> maybeIndexTs = indexTs.getUpdateTs(itemName);
+    String itemNameString = itemName.name().toLowerCase();
+    if (maybeIndexTs.isPresent()) {
+      Timestamp lastIndexTs = Timestamp.valueOf(maybeIndexTs.get());
+      Timestamp newLastIndexTs = lastIndexTs;
+      log.debug("Scanning for all the {}s after {}", itemNameString, lastIndexTs);
+      try (ManualRequestContext mctx = ctx.open();
+          ReviewDb db = mctx.getReviewDbProvider().get()) {
+        int count = 0;
+        int errors = 0;
+        Stopwatch stopwatch = Stopwatch.createStarted();
+        for (T c : fetchItems(db)) {
+          try {
+            Optional<Timestamp> itemTs = indexIfNeeded(db, c, lastIndexTs);
+            if (itemTs.isPresent()) {
+              count++;
+              if (itemTs.get().after(newLastIndexTs)) {
+                newLastIndexTs = itemTs.get();
+              }
+            }
+          } catch (Exception e) {
+            log.error("Unable to reindex {} {}", itemNameString, c, e);
+            errors++;
+          }
+        }
+        long elapsedNanos = stopwatch.stop().elapsed(TimeUnit.NANOSECONDS);
+        if (count > 0) {
+          log.info(
+              "{} {}s reindexed in {} msec ({}/sec), {} failed",
+              count,
+              itemNameString,
+              elapsedNanos / 1000000L,
+              (count * 1000L) / (elapsedNanos / 1000000L),
+              errors);
+        } else if (errors > 0) {
+          log.info("{} {}s failed to reindex", errors, itemNameString);
+        } else {
+          log.debug("Scanning finished");
+        }
+        indexTs.update(itemName, newLastIndexTs.toLocalDateTime());
+      } catch (Exception e) {
+        log.error("Unable to scan " + itemNameString + "s", e);
+      }
+    }
+  }
+
+  protected abstract Iterable<T> fetchItems(ReviewDb db) throws Exception;
+
+  protected abstract Optional<Timestamp> indexIfNeeded(ReviewDb db, T item, Timestamp sinceTs);
+}
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexAccountHandler.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexAccountHandler.java
index 42d2123..1d68e72 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexAccountHandler.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexAccountHandler.java
@@ -14,12 +14,14 @@
 
 package com.ericsson.gerrit.plugins.highavailability.forwarder;
 
+import com.ericsson.gerrit.plugins.highavailability.Configuration;
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.server.index.account.AccountIndexer;
 import com.google.gwtorm.server.OrmException;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 import java.io.IOException;
+import java.util.Optional;
 
 /**
  * Index an account using {@link AccountIndexer}. This class is meant to be used on the receiving
@@ -32,18 +34,20 @@
   private final AccountIndexer indexer;
 
   @Inject
-  ForwardedIndexAccountHandler(AccountIndexer indexer) {
+  ForwardedIndexAccountHandler(AccountIndexer indexer, Configuration config) {
+    super(config.index());
     this.indexer = indexer;
   }
 
   @Override
-  protected void doIndex(Account.Id id) throws IOException, OrmException {
+  protected void doIndex(Account.Id id, Optional<IndexEvent> indexEvent)
+      throws IOException, OrmException {
     indexer.index(id);
     log.debug("Account {} successfully indexed", id);
   }
 
   @Override
-  protected void doDelete(Account.Id id) {
+  protected void doDelete(Account.Id id, Optional<IndexEvent> indexEvent) {
     throw new UnsupportedOperationException("Delete from account index not supported");
   }
 }
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandler.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandler.java
index f31ef81..eb738d9 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandler.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandler.java
@@ -14,6 +14,7 @@
 
 package com.ericsson.gerrit.plugins.highavailability.forwarder;
 
+import com.ericsson.gerrit.plugins.highavailability.Configuration;
 import com.google.common.base.Splitter;
 import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.server.ReviewDb;
@@ -26,6 +27,7 @@
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 import java.io.IOException;
+import java.util.Optional;
 
 /**
  * Index a change using {@link ChangeIndexer}. This class is meant to be used on the receiving side
@@ -41,14 +43,19 @@
 
   @Inject
   ForwardedIndexChangeHandler(
-      ChangeIndexer indexer, SchemaFactory<ReviewDb> schemaFactory, ChangeFinder changeFinder) {
+      ChangeIndexer indexer,
+      SchemaFactory<ReviewDb> schemaFactory,
+      ChangeFinder changeFinder,
+      Configuration config) {
+    super(config.index());
     this.indexer = indexer;
     this.schemaFactory = schemaFactory;
     this.changeFinder = changeFinder;
   }
 
   @Override
-  protected void doIndex(String id) throws IOException, OrmException {
+  protected void doIndex(String id, Optional<IndexEvent> indexEvent)
+      throws IOException, OrmException {
     ChangeNotes change = null;
     try (ReviewDb db = schemaFactory.open()) {
       change = changeFinder.findOne(id);
@@ -70,7 +77,7 @@
   }
 
   @Override
-  protected void doDelete(String id) throws IOException {
+  protected void doDelete(String id, Optional<IndexEvent> indexEvent) throws IOException {
     indexer.delete(parseChangeId(id));
     log.debug("Change {} successfully deleted from index", id);
   }
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexGroupHandler.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexGroupHandler.java
index c518484..cbb748b 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexGroupHandler.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexGroupHandler.java
@@ -14,12 +14,14 @@
 
 package com.ericsson.gerrit.plugins.highavailability.forwarder;
 
+import com.ericsson.gerrit.plugins.highavailability.Configuration;
 import com.google.gerrit.reviewdb.client.AccountGroup;
 import com.google.gerrit.server.index.group.GroupIndexer;
 import com.google.gwtorm.server.OrmException;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 import java.io.IOException;
+import java.util.Optional;
 
 /**
  * Index a group using {@link GroupIndexer}. This class is meant to be used on the receiving side of
@@ -32,18 +34,20 @@
   private final GroupIndexer indexer;
 
   @Inject
-  ForwardedIndexGroupHandler(GroupIndexer indexer) {
+  ForwardedIndexGroupHandler(GroupIndexer indexer, Configuration config) {
+    super(config.index());
     this.indexer = indexer;
   }
 
   @Override
-  protected void doIndex(AccountGroup.UUID uuid) throws IOException, OrmException {
+  protected void doIndex(AccountGroup.UUID uuid, Optional<IndexEvent> indexEvent)
+      throws IOException, OrmException {
     indexer.index(uuid);
     log.debug("Group {} successfully indexed", uuid);
   }
 
   @Override
-  protected void doDelete(AccountGroup.UUID uuid) {
+  protected void doDelete(AccountGroup.UUID uuid, Optional<IndexEvent> indexEvent) {
     throw new UnsupportedOperationException("Delete from group index not supported");
   }
 }
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexingHandler.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexingHandler.java
index e64d97b..bfedf3f 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexingHandler.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexingHandler.java
@@ -14,9 +14,11 @@
 
 package com.ericsson.gerrit.plugins.highavailability.forwarder;
 
+import com.ericsson.gerrit.plugins.highavailability.Configuration;
 import com.google.common.util.concurrent.Striped;
 import com.google.gwtorm.server.OrmException;
 import java.io.IOException;
+import java.util.Optional;
 import java.util.concurrent.locks.Lock;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -40,22 +42,29 @@
     }
   }
 
-  private final Striped<Lock> idLocks = Striped.lock(10);
+  private final Striped<Lock> idLocks;
 
-  protected abstract void doIndex(T id) throws IOException, OrmException;
+  protected abstract void doIndex(T id, Optional<IndexEvent> indexEvent)
+      throws IOException, OrmException;
 
-  protected abstract void doDelete(T id) throws IOException;
+  protected abstract void doDelete(T id, Optional<IndexEvent> indexEvent) throws IOException;
+
+  protected ForwardedIndexingHandler(Configuration.Index indexConfig) {
+    idLocks = Striped.lock(indexConfig.numStripedLocks());
+  }
 
   /**
    * Index an item in the local node, indexing will not be forwarded to the other node.
    *
    * @param id The id to index.
    * @param operation The operation to do; index or delete
+   * @param indexEvent The index event details.
    * @throws IOException If an error occur while indexing.
    * @throws OrmException If an error occur while retrieving a change related to the item to index
    */
-  public void index(T id, Operation operation) throws IOException, OrmException {
-    log.debug("{} {}", operation, id);
+  public void index(T id, Operation operation, Optional<IndexEvent> indexEvent)
+      throws IOException, OrmException {
+    log.debug("{} {} {}", operation, id, indexEvent);
     try {
       Context.setForwardedEvent(true);
       Lock idLock = idLocks.get(id);
@@ -63,10 +72,10 @@
       try {
         switch (operation) {
           case INDEX:
-            doIndex(id);
+            doIndex(id, indexEvent);
             break;
           case DELETE:
-            doDelete(id);
+            doDelete(id, indexEvent);
             break;
           default:
             log.error("unexpected operation: {}", operation);
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/Forwarder.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/Forwarder.java
index ab09b65..b156563 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/Forwarder.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/Forwarder.java
@@ -23,34 +23,38 @@
    * Forward a account indexing event to the other master.
    *
    * @param accountId the account to index.
+   * @param indexEvent the details of the index event.
    * @return true if successful, otherwise false.
    */
-  boolean indexAccount(int accountId);
+  boolean indexAccount(int accountId, IndexEvent indexEvent);
 
   /**
    * Forward a change indexing event to the other master.
    *
    * @param projectName the project of the change to index.
    * @param changeId the change to index.
+   * @param indexEvent the details of the index event.
    * @return true if successful, otherwise false.
    */
-  boolean indexChange(String projectName, int changeId);
+  boolean indexChange(String projectName, int changeId, IndexEvent indexEvent);
 
   /**
    * Forward a delete change from index event to the other master.
    *
    * @param changeId the change to remove from the index.
+   * @param indexEvent the details of the index event.
    * @return rue if successful, otherwise false.
    */
-  boolean deleteChangeFromIndex(int changeId);
+  boolean deleteChangeFromIndex(int changeId, IndexEvent indexEvent);
 
   /**
    * Forward a group indexing event to the other master.
    *
    * @param uuid the group to index.
+   * @param indexEvent the details of the index event.
    * @return true if successful, otherwise false.
    */
-  boolean indexGroup(String uuid);
+  boolean indexGroup(String uuid, IndexEvent indexEvent);
 
   /**
    * Forward a stream event to the other master.
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/IndexEvent.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/IndexEvent.java
new file mode 100644
index 0000000..f6f24a7
--- /dev/null
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/IndexEvent.java
@@ -0,0 +1,30 @@
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.ericsson.gerrit.plugins.highavailability.forwarder;
+
+import java.time.LocalDateTime;
+import java.time.ZoneOffset;
+import java.time.format.DateTimeFormatter;
+
+public class IndexEvent {
+  public long eventCreatedOn = System.currentTimeMillis() / 1000;
+
+  @Override
+  public String toString() {
+    return "IndexEvent@"
+        + LocalDateTime.ofEpochSecond(eventCreatedOn, 0, ZoneOffset.UTC)
+            .format(DateTimeFormatter.ISO_DATE_TIME);
+  }
+}
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/AbstractIndexRestApiServlet.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/AbstractIndexRestApiServlet.java
index 7349ca5..8c429de 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/AbstractIndexRestApiServlet.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/AbstractIndexRestApiServlet.java
@@ -21,13 +21,20 @@
 
 import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedIndexingHandler;
 import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedIndexingHandler.Operation;
+import com.ericsson.gerrit.plugins.highavailability.forwarder.IndexEvent;
+import com.google.common.base.Charsets;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
 import com.google.gwtorm.server.OrmException;
 import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.Optional;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
 public abstract class AbstractIndexRestApiServlet<T> extends AbstractRestApiServlet {
   private static final long serialVersionUID = -1L;
+  private static final Gson gson = new GsonBuilder().create();
 
   private final ForwardedIndexingHandler<T> forwardedIndexingHandler;
   private final IndexName indexName;
@@ -80,7 +87,7 @@
     String path = req.getRequestURI();
     T id = parse(path.substring(path.lastIndexOf('/') + 1));
     try {
-      forwardedIndexingHandler.index(id, operation);
+      forwardedIndexingHandler.index(id, operation, parseBody(req));
       rsp.setStatus(SC_NO_CONTENT);
     } catch (IOException e) {
       sendError(rsp, SC_CONFLICT, e.getMessage());
@@ -91,4 +98,14 @@
       log.debug(msg, e);
     }
   }
+
+  protected Optional<IndexEvent> parseBody(HttpServletRequest req) throws IOException {
+    String contentType = req.getContentType();
+    if (contentType != null && contentType.contains("application/json")) {
+      return Optional.ofNullable(
+          gson.fromJson(
+              new InputStreamReader(req.getInputStream(), Charsets.UTF_8), IndexEvent.class));
+    }
+    return Optional.empty();
+  }
 }
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/HttpSession.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/HttpSession.java
index d3fce97..253dca7 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/HttpSession.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/HttpSession.java
@@ -16,14 +16,19 @@
 
 import com.ericsson.gerrit.plugins.highavailability.forwarder.rest.HttpResponseHandler.HttpResult;
 import com.ericsson.gerrit.plugins.highavailability.peers.PeerInfo;
-import com.google.common.base.Strings;
+import com.google.common.base.Supplier;
 import com.google.common.net.MediaType;
+import com.google.gerrit.server.events.SupplierSerializer;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
 import com.google.inject.Inject;
 import com.google.inject.Provider;
 import java.io.IOException;
+import java.net.URI;
 import java.nio.charset.StandardCharsets;
 import java.util.Optional;
 import org.apache.http.client.methods.HttpDelete;
+import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.entity.StringEntity;
 import org.apache.http.impl.client.CloseableHttpClient;
@@ -31,6 +36,8 @@
 class HttpSession {
   private final CloseableHttpClient httpClient;
   private final Provider<Optional<PeerInfo>> peerInfo;
+  private final Gson gson =
+      new GsonBuilder().registerTypeAdapter(Supplier.class, new SupplierSerializer()).create();
 
   @Inject
   HttpSession(CloseableHttpClient httpClient, Provider<Optional<PeerInfo>> peerInfo) {
@@ -42,18 +49,14 @@
     return post(endpoint, null);
   }
 
-  HttpResult post(String endpoint, String content) throws IOException {
+  HttpResult post(String endpoint, Object content) throws IOException {
     HttpPost post = new HttpPost(getPeerInfo().getDirectUrl() + endpoint);
-    if (!Strings.isNullOrEmpty(content)) {
-      post.addHeader("Content-Type", MediaType.JSON_UTF_8.toString());
-      post.setEntity(new StringEntity(content, StandardCharsets.UTF_8));
-    }
+    setContent(post, content);
     return httpClient.execute(post, new HttpResponseHandler());
   }
 
   HttpResult delete(String endpoint) throws IOException {
-    return httpClient.execute(
-        new HttpDelete(getPeerInfo().getDirectUrl() + endpoint), new HttpResponseHandler());
+    return delete(endpoint, null);
   }
 
   private PeerInfo getPeerInfo() throws PeerInfoNotAvailableException {
@@ -63,4 +66,35 @@
     }
     return info;
   }
+
+  HttpResult delete(String endpoint, Object content) throws IOException {
+    HttpDeleteWithBody delete = new HttpDeleteWithBody(getPeerInfo().getDirectUrl() + endpoint);
+    setContent(delete, content);
+    return httpClient.execute(delete, new HttpResponseHandler());
+  }
+
+  private void setContent(HttpEntityEnclosingRequestBase request, Object content) {
+    if (content != null) {
+      request.addHeader("Content-Type", MediaType.JSON_UTF_8.toString());
+      request.setEntity(new StringEntity(jsonEncode(content), StandardCharsets.UTF_8));
+    }
+  }
+
+  private String jsonEncode(Object content) {
+    if (content instanceof String) {
+      return (String) content;
+    }
+    return gson.toJson(content);
+  }
+
+  private class HttpDeleteWithBody extends HttpEntityEnclosingRequestBase {
+    @Override
+    public String getMethod() {
+      return HttpDelete.METHOD_NAME;
+    }
+
+    private HttpDeleteWithBody(String uri) {
+      setURI(URI.create(uri));
+    }
+  }
 }
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarder.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarder.java
index c2a0c6d..1e9e931 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarder.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarder.java
@@ -17,17 +17,17 @@
 import com.ericsson.gerrit.plugins.highavailability.Configuration;
 import com.ericsson.gerrit.plugins.highavailability.cache.Constants;
 import com.ericsson.gerrit.plugins.highavailability.forwarder.Forwarder;
+import com.ericsson.gerrit.plugins.highavailability.forwarder.IndexEvent;
 import com.ericsson.gerrit.plugins.highavailability.forwarder.rest.HttpResponseHandler.HttpResult;
 import com.google.common.base.Joiner;
-import com.google.common.base.Supplier;
 import com.google.gerrit.extensions.annotations.PluginName;
 import com.google.gerrit.extensions.restapi.Url;
 import com.google.gerrit.server.events.Event;
-import com.google.gerrit.server.events.SupplierSerializer;
-import com.google.gson.GsonBuilder;
 import com.google.inject.Inject;
 import java.io.IOException;
 import javax.net.ssl.SSLException;
+import org.apache.http.HttpException;
+import org.apache.http.client.ClientProtocolException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -46,42 +46,43 @@
   }
 
   @Override
-  public boolean indexAccount(final int accountId) {
+  public boolean indexAccount(final int accountId, IndexEvent event) {
     return new Request("index account", accountId) {
       @Override
       HttpResult send() throws IOException {
         return httpSession.post(
-            Joiner.on("/").join(pluginRelativePath, "index/account", accountId));
+            Joiner.on("/").join(pluginRelativePath, "index/account", accountId), event);
       }
     }.execute();
   }
 
   @Override
-  public boolean indexChange(final String projectName, final int changeId) {
+  public boolean indexChange(String projectName, int changeId, IndexEvent event) {
     return new Request("index change", changeId) {
       @Override
       HttpResult send() throws IOException {
-        return httpSession.post(buildIndexEndpoint(projectName, changeId));
+        return httpSession.post(buildIndexEndpoint(projectName, changeId), event);
       }
     }.execute();
   }
 
   @Override
-  public boolean deleteChangeFromIndex(final int changeId) {
+  public boolean deleteChangeFromIndex(final int changeId, IndexEvent event) {
     return new Request("delete change", changeId) {
       @Override
       HttpResult send() throws IOException {
-        return httpSession.delete(buildIndexEndpoint(changeId));
+        return httpSession.delete(buildIndexEndpoint(changeId), event);
       }
     }.execute();
   }
 
   @Override
-  public boolean indexGroup(final String uuid) {
+  public boolean indexGroup(final String uuid, IndexEvent event) {
     return new Request("index group", uuid) {
       @Override
       HttpResult send() throws IOException {
-        return httpSession.post(Joiner.on("/").join(pluginRelativePath, "index/group", uuid));
+        return httpSession.post(
+            Joiner.on("/").join(pluginRelativePath, "index/group", uuid), event);
       }
     }.execute();
   }
@@ -101,12 +102,7 @@
     return new Request("send event", event.type) {
       @Override
       HttpResult send() throws IOException {
-        String serializedEvent =
-            new GsonBuilder()
-                .registerTypeAdapter(Supplier.class, new SupplierSerializer())
-                .create()
-                .toJson(event);
-        return httpSession.post(Joiner.on("/").join(pluginRelativePath, "event"), serializedEvent);
+        return httpSession.post(Joiner.on("/").join(pluginRelativePath, "event"), event);
       }
     }.execute();
   }
@@ -204,7 +200,10 @@
     abstract HttpResult send() throws IOException;
 
     boolean isRecoverable(IOException e) {
-      return !(e instanceof SSLException);
+      Throwable cause = e.getCause();
+      return !(e instanceof SSLException
+          || cause instanceof HttpException
+          || cause instanceof ClientProtocolException);
     }
   }
 }
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/index/IndexEventHandler.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/index/IndexEventHandler.java
index 175eaaf..106422d 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/index/IndexEventHandler.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/index/IndexEventHandler.java
@@ -16,6 +16,7 @@
 
 import com.ericsson.gerrit.plugins.highavailability.forwarder.Context;
 import com.ericsson.gerrit.plugins.highavailability.forwarder.Forwarder;
+import com.ericsson.gerrit.plugins.highavailability.forwarder.IndexEvent;
 import com.google.common.base.Objects;
 import com.google.gerrit.extensions.annotations.PluginName;
 import com.google.gerrit.extensions.events.AccountIndexedListener;
@@ -82,6 +83,12 @@
   }
 
   abstract class IndexTask implements Runnable {
+    protected final IndexEvent indexEvent;
+
+    IndexTask() {
+      indexEvent = new IndexEvent();
+    }
+
     @Override
     public void run() {
       queuedTasks.remove(this);
@@ -105,9 +112,9 @@
     @Override
     public void execute() {
       if (deleted) {
-        forwarder.deleteChangeFromIndex(changeId);
+        forwarder.deleteChangeFromIndex(changeId, indexEvent);
       } else {
-        forwarder.indexChange(projectName, changeId);
+        forwarder.indexChange(projectName, changeId, indexEvent);
       }
     }
 
@@ -140,7 +147,7 @@
 
     @Override
     public void execute() {
-      forwarder.indexAccount(accountId);
+      forwarder.indexAccount(accountId, indexEvent);
     }
 
     @Override
@@ -172,7 +179,7 @@
 
     @Override
     public void execute() {
-      forwarder.indexGroup(groupUUID);
+      forwarder.indexGroup(groupUUID, indexEvent);
     }
 
     @Override
diff --git a/src/main/resources/Documentation/config.md b/src/main/resources/Documentation/config.md
index 12b00b9..b59b1fc 100644
--- a/src/main/resources/Documentation/config.md
+++ b/src/main/resources/Documentation/config.md
@@ -12,6 +12,8 @@
 ```
 [main]
   sharedDirectory = /directory/accessible/from/both/instances
+[autoReindex]
+  enabled = false
 [peerInfo]
   strategy = static
 [peerInfo "static"]
@@ -26,6 +28,8 @@
 ```
 [main]
   sharedDirectory = /directory/accessible/from/both/instances
+[autoReindex]
+  enabled = false
 [peerInfo]
   strategy = jgroups
 [peerInfo "jgroups"]
@@ -50,6 +54,32 @@
     directory is "/gerrit/root/shared/dir". When not specified, the default
     is "shared".
 
+```autoReindex.enabled```
+:   Enable the tracking of the latest change indexed under data/high-availability
+    for each of the indexes. At startup scans all the changes, accounts and groups
+    and reindex the ones that have been updated by other nodes while the server was down.
+    When not specified, the default is "false", that means no automatic tracking
+    and indexing at start.
+
+```autoReindex.delay```
+:   When autoReindex is enabled, indicates the delay aftere the plugin startup,
+    before triggering the conditional reindexing of all changes, accounts and groups.
+    Delay is expressed in Gerrit time values as in [websession.cleanupInterval](#websessioncleanupInterval).
+    When not specified, the default is "10 seconds".
+
+```autoReindex.pollInterval```
+:   When autoReindex is enabled, indicates the interval between the conditional
+    reindexing of all changes, accounts and groups.
+    Delay is expressed in Gerrit time values as in [websession.cleanupInterval](#websessioncleanupInterval).
+    When not specified, polling of conditional reindexing is disabled.
+
+```autoReindex.interval```
+:   Enable the tracking of the latest change indexed under data/high-availability
+    for each of the indexes. At startup scans all the changes, accounts and groups
+    and reindex the ones that have been updated by other nodes while the server was down.
+    When not specified, the default is "false", that means no automatic tracking
+    and indexing at start.
+
 ```peerInfo.strategy```
 :   Strategy to find other peers. Supported strategies are `static` or `jgroups`.
     Defaults to `static`.
@@ -150,6 +180,10 @@
 :   Whether to synchronize stream events.
     Defaults to true.
 
+```index.numStripedLocks```
+:   Number of striped locks to use during reindexing.
+    Defaults to 10.
+
 ```index.synchronize```
 :   Whether to synchronize secondary indexes.
     Defaults to true.
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/ConfigurationTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/ConfigurationTest.java
index bb4c360..efb3b75 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/ConfigurationTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/ConfigurationTest.java
@@ -14,46 +14,48 @@
 
 package com.ericsson.gerrit.plugins.highavailability;
 
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.CACHE_SECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.CLEANUP_INTERVAL_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.CLUSTER_NAME_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.CONNECTION_TIMEOUT_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_CLEANUP_INTERVAL_MS;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_CLUSTER_NAME;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_HEALTH_CHECK_ENABLED;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_MAX_TRIES;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_PEER_INFO_STRATEGY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_RETRY_INTERVAL;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_SHARED_DIRECTORY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_SKIP_INTERFACE_LIST;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_SYNCHRONIZE;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Cache.CACHE_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Cache.PATTERN_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_NUM_STRIPED_LOCKS;
 import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_THREAD_POOL_SIZE;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.DEFAULT_TIMEOUT_MS;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.ENABLE_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.EVENT_SECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.HEALTH_CHECK_SECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.HTTP_SECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.INDEX_SECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGROUPS_SECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGROUPS_SUBSECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.MAIN_SECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.MAX_TRIES_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.MY_URL_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.PASSWORD_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.PATTERN_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Event.EVENT_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Forwarding.DEFAULT_SYNCHRONIZE;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Forwarding.SYNCHRONIZE_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.HealthCheck.DEFAULT_HEALTH_CHECK_ENABLED;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.HealthCheck.ENABLE_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.HealthCheck.HEALTH_CHECK_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.CONNECTION_TIMEOUT_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.DEFAULT_MAX_TRIES;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.DEFAULT_RETRY_INTERVAL;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.DEFAULT_TIMEOUT_MS;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.HTTP_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.MAX_TRIES_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.PASSWORD_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.RETRY_INTERVAL_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.SOCKET_TIMEOUT_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Http.USER_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Index.INDEX_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGroups.CLUSTER_NAME_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGroups.DEFAULT_CLUSTER_NAME;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGroups.DEFAULT_SKIP_INTERFACE_LIST;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGroups.JGROUPS_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGroups.PROTOCOL_STACK_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.JGroups.SKIP_INTERFACE_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Main.DEFAULT_SHARED_DIRECTORY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Main.MAIN_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Main.SHARED_DIRECTORY_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.NUM_STRIPED_LOCKS;
 import static com.ericsson.gerrit.plugins.highavailability.Configuration.PEER_INFO_SECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.PROTOCOL_STACK_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.RETRY_INTERVAL_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.SHARED_DIRECTORY_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.SKIP_INTERFACE_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.SOCKET_TIMEOUT_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.STATIC_SUBSECTION;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.STRATEGY_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.SYNCHRONIZE_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.PeerInfo.DEFAULT_PEER_INFO_STRATEGY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.PeerInfo.STRATEGY_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.PeerInfoJGroups.JGROUPS_SUBSECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.PeerInfoJGroups.MY_URL_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.PeerInfoStatic.STATIC_SUBSECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.PeerInfoStatic.URL_KEY;
 import static com.ericsson.gerrit.plugins.highavailability.Configuration.THREAD_POOL_SIZE_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.URL_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.USER_KEY;
-import static com.ericsson.gerrit.plugins.highavailability.Configuration.WEBSESSION_SECTION;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Websession.CLEANUP_INTERVAL_KEY;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Websession.DEFAULT_CLEANUP_INTERVAL_MS;
+import static com.ericsson.gerrit.plugins.highavailability.Configuration.Websession.WEBSESSION_SECTION;
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.common.truth.Truth8.assertThat;
 import static java.util.concurrent.TimeUnit.SECONDS;
@@ -377,4 +379,12 @@
     globalPluginConfig.setBoolean(HEALTH_CHECK_SECTION, null, ENABLE_KEY, true);
     assertThat(getConfiguration().healthCheck().enabled()).isTrue();
   }
+
+  @Test
+  public void testGetIndexNumStripedLocks() throws Exception {
+    assertThat(getConfiguration().index().numStripedLocks()).isEqualTo(DEFAULT_NUM_STRIPED_LOCKS);
+
+    globalPluginConfig.setInt(INDEX_SECTION, null, NUM_STRIPED_LOCKS, 100);
+    assertThat(getConfiguration().index().numStripedLocks()).isEqualTo(100);
+  }
 }
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexAccountHandlerTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexAccountHandlerTest.java
index 0a96776..c2d3659 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexAccountHandlerTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexAccountHandlerTest.java
@@ -18,11 +18,14 @@
 import static org.junit.Assert.fail;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
 
+import com.ericsson.gerrit.plugins.highavailability.Configuration;
 import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedIndexingHandler.Operation;
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.server.index.account.AccountIndexer;
 import java.io.IOException;
+import java.util.Optional;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
@@ -37,18 +40,22 @@
 
   @Rule public ExpectedException exception = ExpectedException.none();
   @Mock private AccountIndexer indexerMock;
+  @Mock private Configuration configMock;
+  @Mock private Configuration.Index indexMock;
   private ForwardedIndexAccountHandler handler;
   private Account.Id id;
 
   @Before
   public void setUp() throws Exception {
-    handler = new ForwardedIndexAccountHandler(indexerMock);
+    when(configMock.index()).thenReturn(indexMock);
+    when(indexMock.numStripedLocks()).thenReturn(10);
+    handler = new ForwardedIndexAccountHandler(indexerMock, configMock);
     id = new Account.Id(123);
   }
 
   @Test
   public void testSuccessfulIndexing() throws Exception {
-    handler.index(id, Operation.INDEX);
+    handler.index(id, Operation.INDEX, Optional.empty());
     verify(indexerMock).index(id);
   }
 
@@ -56,7 +63,7 @@
   public void deleteIsNotSupported() throws Exception {
     exception.expect(UnsupportedOperationException.class);
     exception.expectMessage("Delete from account index not supported");
-    handler.index(id, Operation.DELETE);
+    handler.index(id, Operation.DELETE, Optional.empty());
   }
 
   @Test
@@ -73,7 +80,7 @@
         .index(id);
 
     assertThat(Context.isForwardedEvent()).isFalse();
-    handler.index(id, Operation.INDEX);
+    handler.index(id, Operation.INDEX, Optional.empty());
     assertThat(Context.isForwardedEvent()).isFalse();
 
     verify(indexerMock).index(id);
@@ -92,7 +99,7 @@
 
     assertThat(Context.isForwardedEvent()).isFalse();
     try {
-      handler.index(id, Operation.INDEX);
+      handler.index(id, Operation.INDEX, Optional.empty());
       fail("should have thrown an IOException");
     } catch (IOException e) {
       assertThat(e.getMessage()).isEqualTo("someMessage");
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandlerTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandlerTest.java
index 63db939..54cd266 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandlerTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandlerTest.java
@@ -23,6 +23,7 @@
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
+import com.ericsson.gerrit.plugins.highavailability.Configuration;
 import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedIndexingHandler.Operation;
 import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.server.ReviewDb;
@@ -34,6 +35,7 @@
 import com.google.gwtorm.server.OrmException;
 import com.google.gwtorm.server.SchemaFactory;
 import java.io.IOException;
+import java.util.Optional;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
@@ -62,6 +64,8 @@
   @Mock private ReviewDb dbMock;
   @Mock private ChangeFinder changeFinderMock;
   @Mock private ChangeNotes changeNotes;
+  @Mock private Configuration configMock;
+  @Mock private Configuration.Index indexMock;
   private ForwardedIndexChangeHandler handler;
   private Change.Id id;
   private Change change;
@@ -72,26 +76,30 @@
     id = new Change.Id(TEST_CHANGE_NUMBER);
     change = new Change(null, id, null, null, TimeUtil.nowTs());
     when(changeNotes.getChange()).thenReturn(change);
-    handler = new ForwardedIndexChangeHandler(indexerMock, schemaFactoryMock, changeFinderMock);
+    when(configMock.index()).thenReturn(indexMock);
+    when(indexMock.numStripedLocks()).thenReturn(10);
+    handler =
+        new ForwardedIndexChangeHandler(
+            indexerMock, schemaFactoryMock, changeFinderMock, configMock);
   }
 
   @Test
   public void changeIsIndexed() throws Exception {
     setupChangeAccessRelatedMocks(CHANGE_EXISTS);
-    handler.index(TEST_CHANGE_ID, Operation.INDEX);
+    handler.index(TEST_CHANGE_ID, Operation.INDEX, Optional.empty());
     verify(indexerMock, times(1)).index(any(ReviewDb.class), any(Change.class));
   }
 
   @Test
   public void changeIsDeletedFromIndex() throws Exception {
-    handler.index(TEST_CHANGE_ID, Operation.DELETE);
+    handler.index(TEST_CHANGE_ID, Operation.DELETE, Optional.empty());
     verify(indexerMock, times(1)).delete(id);
   }
 
   @Test
   public void changeToIndexDoesNotExist() throws Exception {
     setupChangeAccessRelatedMocks(CHANGE_DOES_NOT_EXIST);
-    handler.index(TEST_CHANGE_ID, Operation.INDEX);
+    handler.index(TEST_CHANGE_ID, Operation.INDEX, Optional.empty());
     verify(indexerMock, times(1)).delete(id);
   }
 
@@ -99,13 +107,13 @@
   public void schemaThrowsExceptionWhenLookingUpForChange() throws Exception {
     setupChangeAccessRelatedMocks(CHANGE_EXISTS, THROW_ORM_EXCEPTION);
     exception.expect(OrmException.class);
-    handler.index(TEST_CHANGE_ID, Operation.INDEX);
+    handler.index(TEST_CHANGE_ID, Operation.INDEX, Optional.empty());
   }
 
   @Test
   public void indexerThrowsNoSuchChangeExceptionTryingToPostChange() throws Exception {
     doThrow(new NoSuchChangeException(id)).when(schemaFactoryMock).open();
-    handler.index(TEST_CHANGE_ID, Operation.INDEX);
+    handler.index(TEST_CHANGE_ID, Operation.INDEX, Optional.empty());
     verify(indexerMock, times(1)).delete(id);
   }
 
@@ -113,7 +121,7 @@
   public void indexerThrowsNestedNoSuchChangeExceptionTryingToPostChange() throws Exception {
     OrmException e = new OrmException("test", new NoSuchChangeException(id));
     doThrow(e).when(schemaFactoryMock).open();
-    handler.index(TEST_CHANGE_ID, Operation.INDEX);
+    handler.index(TEST_CHANGE_ID, Operation.INDEX, Optional.empty());
     verify(indexerMock, times(1)).delete(id);
   }
 
@@ -121,7 +129,7 @@
   public void indexerThrowsIOExceptionTryingToIndexChange() throws Exception {
     setupChangeAccessRelatedMocks(CHANGE_EXISTS, DO_NOT_THROW_ORM_EXCEPTION, THROW_IO_EXCEPTION);
     exception.expect(IOException.class);
-    handler.index(TEST_CHANGE_ID, Operation.INDEX);
+    handler.index(TEST_CHANGE_ID, Operation.INDEX, Optional.empty());
   }
 
   @Test
@@ -139,7 +147,7 @@
         .index(any(ReviewDb.class), any(Change.class));
 
     assertThat(Context.isForwardedEvent()).isFalse();
-    handler.index(TEST_CHANGE_ID, Operation.INDEX);
+    handler.index(TEST_CHANGE_ID, Operation.INDEX, Optional.empty());
     assertThat(Context.isForwardedEvent()).isFalse();
 
     verify(indexerMock, times(1)).index(any(ReviewDb.class), any(Change.class));
@@ -159,7 +167,7 @@
 
     assertThat(Context.isForwardedEvent()).isFalse();
     try {
-      handler.index(TEST_CHANGE_ID, Operation.INDEX);
+      handler.index(TEST_CHANGE_ID, Operation.INDEX, Optional.empty());
       fail("should have thrown an IOException");
     } catch (IOException e) {
       assertThat(e.getMessage()).isEqualTo("someMessage");
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexGroupHandlerTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexGroupHandlerTest.java
index d2387d9..ab55b73 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexGroupHandlerTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexGroupHandlerTest.java
@@ -18,11 +18,14 @@
 import static org.junit.Assert.fail;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
 
+import com.ericsson.gerrit.plugins.highavailability.Configuration;
 import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedIndexingHandler.Operation;
 import com.google.gerrit.reviewdb.client.AccountGroup;
 import com.google.gerrit.server.index.group.GroupIndexer;
 import java.io.IOException;
+import java.util.Optional;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
@@ -37,18 +40,22 @@
 
   @Rule public ExpectedException exception = ExpectedException.none();
   @Mock private GroupIndexer indexerMock;
+  @Mock private Configuration configMock;
+  @Mock private Configuration.Index indexMock;
   private ForwardedIndexGroupHandler handler;
   private AccountGroup.UUID uuid;
 
   @Before
   public void setUp() throws Exception {
-    handler = new ForwardedIndexGroupHandler(indexerMock);
+    when(configMock.index()).thenReturn(indexMock);
+    when(indexMock.numStripedLocks()).thenReturn(10);
+    handler = new ForwardedIndexGroupHandler(indexerMock, configMock);
     uuid = new AccountGroup.UUID("123");
   }
 
   @Test
   public void testSuccessfulIndexing() throws Exception {
-    handler.index(uuid, Operation.INDEX);
+    handler.index(uuid, Operation.INDEX, Optional.empty());
     verify(indexerMock).index(uuid);
   }
 
@@ -56,7 +63,7 @@
   public void deleteIsNotSupported() throws Exception {
     exception.expect(UnsupportedOperationException.class);
     exception.expectMessage("Delete from group index not supported");
-    handler.index(uuid, Operation.DELETE);
+    handler.index(uuid, Operation.DELETE, Optional.empty());
   }
 
   @Test
@@ -73,7 +80,7 @@
         .index(uuid);
 
     assertThat(Context.isForwardedEvent()).isFalse();
-    handler.index(uuid, Operation.INDEX);
+    handler.index(uuid, Operation.INDEX, Optional.empty());
     assertThat(Context.isForwardedEvent()).isFalse();
 
     verify(indexerMock).index(uuid);
@@ -92,7 +99,7 @@
 
     assertThat(Context.isForwardedEvent()).isFalse();
     try {
-      handler.index(uuid, Operation.INDEX);
+      handler.index(uuid, Operation.INDEX, Optional.empty());
       fail("should have thrown an IOException");
     } catch (IOException e) {
       assertThat(e.getMessage()).isEqualTo("someMessage");
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexAccountRestApiServletTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexAccountRestApiServletTest.java
index c41a4a9..4622a17 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexAccountRestApiServletTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexAccountRestApiServletTest.java
@@ -17,6 +17,8 @@
 import static javax.servlet.http.HttpServletResponse.SC_CONFLICT;
 import static javax.servlet.http.HttpServletResponse.SC_METHOD_NOT_ALLOWED;
 import static javax.servlet.http.HttpServletResponse.SC_NO_CONTENT;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.doThrow;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
@@ -57,7 +59,7 @@
   @Test
   public void accountIsIndexed() throws Exception {
     servlet.doPost(requestMock, responseMock);
-    verify(handlerMock, times(1)).index(id, Operation.INDEX);
+    verify(handlerMock, times(1)).index(eq(id), eq(Operation.INDEX), any());
     verify(responseMock).setStatus(SC_NO_CONTENT);
   }
 
@@ -69,14 +71,14 @@
 
   @Test
   public void indexerThrowsIOExceptionTryingToIndexAccount() throws Exception {
-    doThrow(new IOException(IO_ERROR)).when(handlerMock).index(id, Operation.INDEX);
+    doThrow(new IOException(IO_ERROR)).when(handlerMock).index(eq(id), eq(Operation.INDEX), any());
     servlet.doPost(requestMock, responseMock);
     verify(responseMock).sendError(SC_CONFLICT, IO_ERROR);
   }
 
   @Test
   public void sendErrorThrowsIOException() throws Exception {
-    doThrow(new IOException(IO_ERROR)).when(handlerMock).index(id, Operation.INDEX);
+    doThrow(new IOException(IO_ERROR)).when(handlerMock).index(eq(id), eq(Operation.INDEX), any());
     doThrow(new IOException("someError")).when(responseMock).sendError(SC_CONFLICT, IO_ERROR);
     servlet.doPost(requestMock, responseMock);
     verify(responseMock).sendError(SC_CONFLICT, IO_ERROR);
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexChangeRestApiServletTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexChangeRestApiServletTest.java
index 7fccc21..c1fa765 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexChangeRestApiServletTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexChangeRestApiServletTest.java
@@ -17,6 +17,8 @@
 import static javax.servlet.http.HttpServletResponse.SC_CONFLICT;
 import static javax.servlet.http.HttpServletResponse.SC_NOT_FOUND;
 import static javax.servlet.http.HttpServletResponse.SC_NO_CONTENT;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.doThrow;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
@@ -58,34 +60,40 @@
   @Test
   public void changeIsIndexed() throws Exception {
     servlet.doPost(requestMock, responseMock);
-    verify(handlerMock, times(1)).index(CHANGE_ID, Operation.INDEX);
+    verify(handlerMock, times(1)).index(eq(CHANGE_ID), eq(Operation.INDEX), any());
     verify(responseMock).setStatus(SC_NO_CONTENT);
   }
 
   @Test
   public void changeIsDeletedFromIndex() throws Exception {
     servlet.doDelete(requestMock, responseMock);
-    verify(handlerMock, times(1)).index(CHANGE_ID, Operation.DELETE);
+    verify(handlerMock, times(1)).index(eq(CHANGE_ID), eq(Operation.DELETE), any());
     verify(responseMock).setStatus(SC_NO_CONTENT);
   }
 
   @Test
   public void indexerThrowsIOExceptionTryingToIndexChange() throws Exception {
-    doThrow(new IOException(IO_ERROR)).when(handlerMock).index(CHANGE_ID, Operation.INDEX);
+    doThrow(new IOException(IO_ERROR))
+        .when(handlerMock)
+        .index(eq(CHANGE_ID), eq(Operation.INDEX), any());
     servlet.doPost(requestMock, responseMock);
     verify(responseMock).sendError(SC_CONFLICT, IO_ERROR);
   }
 
   @Test
   public void indexerThrowsOrmExceptionTryingToIndexChange() throws Exception {
-    doThrow(new OrmException("some message")).when(handlerMock).index(CHANGE_ID, Operation.INDEX);
+    doThrow(new OrmException("some message"))
+        .when(handlerMock)
+        .index(eq(CHANGE_ID), eq(Operation.INDEX), any());
     servlet.doPost(requestMock, responseMock);
     verify(responseMock).sendError(SC_NOT_FOUND, "Error trying to find change");
   }
 
   @Test
   public void sendErrorThrowsIOException() throws Exception {
-    doThrow(new IOException(IO_ERROR)).when(handlerMock).index(CHANGE_ID, Operation.INDEX);
+    doThrow(new IOException(IO_ERROR))
+        .when(handlerMock)
+        .index(eq(CHANGE_ID), eq(Operation.INDEX), any());
     doThrow(new IOException("someError")).when(responseMock).sendError(SC_CONFLICT, IO_ERROR);
     servlet.doPost(requestMock, responseMock);
     verify(responseMock).sendError(SC_CONFLICT, IO_ERROR);
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexGroupRestApiServletTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexGroupRestApiServletTest.java
index f03727e..6291142 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexGroupRestApiServletTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexGroupRestApiServletTest.java
@@ -17,6 +17,8 @@
 import static javax.servlet.http.HttpServletResponse.SC_CONFLICT;
 import static javax.servlet.http.HttpServletResponse.SC_METHOD_NOT_ALLOWED;
 import static javax.servlet.http.HttpServletResponse.SC_NO_CONTENT;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.doThrow;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
@@ -56,7 +58,7 @@
   @Test
   public void groupIsIndexed() throws Exception {
     servlet.doPost(requestMock, responseMock);
-    verify(handlerMock, times(1)).index(uuid, Operation.INDEX);
+    verify(handlerMock, times(1)).index(eq(uuid), eq(Operation.INDEX), any());
     verify(responseMock).setStatus(SC_NO_CONTENT);
   }
 
@@ -68,14 +70,18 @@
 
   @Test
   public void indexerThrowsIOExceptionTryingToIndexGroup() throws Exception {
-    doThrow(new IOException(IO_ERROR)).when(handlerMock).index(uuid, Operation.INDEX);
+    doThrow(new IOException(IO_ERROR))
+        .when(handlerMock)
+        .index(eq(uuid), eq(Operation.INDEX), any());
     servlet.doPost(requestMock, responseMock);
     verify(responseMock).sendError(SC_CONFLICT, IO_ERROR);
   }
 
   @Test
   public void sendErrorThrowsIOException() throws Exception {
-    doThrow(new IOException(IO_ERROR)).when(handlerMock).index(uuid, Operation.INDEX);
+    doThrow(new IOException(IO_ERROR))
+        .when(handlerMock)
+        .index(eq(uuid), eq(Operation.INDEX), any());
     doThrow(new IOException("someError")).when(responseMock).sendError(SC_CONFLICT, IO_ERROR);
     servlet.doPost(requestMock, responseMock);
     verify(responseMock).sendError(SC_CONFLICT, IO_ERROR);
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarderTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarderTest.java
index f49f2a3..fd2aa52 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarderTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarderTest.java
@@ -15,13 +15,16 @@
 package com.ericsson.gerrit.plugins.highavailability.forwarder.rest;
 
 import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.doThrow;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
 import com.ericsson.gerrit.plugins.highavailability.Configuration;
 import com.ericsson.gerrit.plugins.highavailability.cache.Constants;
+import com.ericsson.gerrit.plugins.highavailability.forwarder.IndexEvent;
 import com.ericsson.gerrit.plugins.highavailability.forwarder.rest.HttpResponseHandler.HttpResult;
 import com.google.common.base.Joiner;
 import com.google.gerrit.reviewdb.client.Account;
@@ -64,7 +67,6 @@
   // Event
   private static final String EVENT_ENDPOINT = Joiner.on("/").join(PLUGINS, PLUGIN_NAME, "event");
   private static Event event = new Event("test-event") {};
-  private static String eventJson = new GsonBuilder().create().toJson(event);
 
   private RestForwarder forwarder;
   private HttpSession httpSessionMock;
@@ -80,99 +82,100 @@
 
   @Test
   public void testIndexAccountOK() throws Exception {
-    when(httpSessionMock.post(INDEX_ACCOUNT_ENDPOINT))
+    when(httpSessionMock.post(eq(INDEX_ACCOUNT_ENDPOINT), any()))
         .thenReturn(new HttpResult(SUCCESSFUL, EMPTY_MSG));
-    assertThat(forwarder.indexAccount(ACCOUNT_NUMBER)).isTrue();
+    assertThat(forwarder.indexAccount(ACCOUNT_NUMBER, new IndexEvent())).isTrue();
   }
 
   @Test
   public void testIndexAccountFailed() throws Exception {
-    when(httpSessionMock.post(INDEX_ACCOUNT_ENDPOINT))
+    when(httpSessionMock.post(eq(INDEX_ACCOUNT_ENDPOINT), any()))
         .thenReturn(new HttpResult(FAILED, EMPTY_MSG));
-    assertThat(forwarder.indexAccount(ACCOUNT_NUMBER)).isFalse();
+    assertThat(forwarder.indexAccount(ACCOUNT_NUMBER, new IndexEvent())).isFalse();
   }
 
   @Test
   public void testIndexAccountThrowsException() throws Exception {
-    doThrow(new IOException()).when(httpSessionMock).post(INDEX_ACCOUNT_ENDPOINT);
-    assertThat(forwarder.indexAccount(ACCOUNT_NUMBER)).isFalse();
+    doThrow(new IOException()).when(httpSessionMock).post(eq(INDEX_ACCOUNT_ENDPOINT), any());
+    assertThat(forwarder.indexAccount(ACCOUNT_NUMBER, new IndexEvent())).isFalse();
   }
 
   @Test
   public void testIndexGroupOK() throws Exception {
-    when(httpSessionMock.post(INDEX_GROUP_ENDPOINT))
+    when(httpSessionMock.post(eq(INDEX_GROUP_ENDPOINT), any()))
         .thenReturn(new HttpResult(SUCCESSFUL, EMPTY_MSG));
-    assertThat(forwarder.indexGroup(UUID)).isTrue();
+    assertThat(forwarder.indexGroup(UUID, new IndexEvent())).isTrue();
   }
 
   @Test
   public void testIndexGroupFailed() throws Exception {
-    when(httpSessionMock.post(INDEX_GROUP_ENDPOINT)).thenReturn(new HttpResult(FAILED, EMPTY_MSG));
-    assertThat(forwarder.indexGroup(UUID)).isFalse();
+    when(httpSessionMock.post(eq(INDEX_GROUP_ENDPOINT), any()))
+        .thenReturn(new HttpResult(FAILED, EMPTY_MSG));
+    assertThat(forwarder.indexGroup(UUID, new IndexEvent())).isFalse();
   }
 
   @Test
   public void testIndexGroupThrowsException() throws Exception {
-    doThrow(new IOException()).when(httpSessionMock).post(INDEX_GROUP_ENDPOINT);
-    assertThat(forwarder.indexGroup(UUID)).isFalse();
+    doThrow(new IOException()).when(httpSessionMock).post(eq(INDEX_GROUP_ENDPOINT), any());
+    assertThat(forwarder.indexGroup(UUID, new IndexEvent())).isFalse();
   }
 
   @Test
   public void testIndexChangeOK() throws Exception {
-    when(httpSessionMock.post(INDEX_CHANGE_ENDPOINT))
+    when(httpSessionMock.post(eq(INDEX_CHANGE_ENDPOINT), any()))
         .thenReturn(new HttpResult(SUCCESSFUL, EMPTY_MSG));
-    assertThat(forwarder.indexChange(PROJECT_NAME, CHANGE_NUMBER)).isTrue();
+    assertThat(forwarder.indexChange(PROJECT_NAME, CHANGE_NUMBER, new IndexEvent())).isTrue();
   }
 
   @Test
   public void testIndexChangeFailed() throws Exception {
-    when(httpSessionMock.post(INDEX_CHANGE_ENDPOINT)).thenReturn(new HttpResult(FAILED, EMPTY_MSG));
-    assertThat(forwarder.indexChange(PROJECT_NAME, CHANGE_NUMBER)).isFalse();
+    when(httpSessionMock.post(eq(INDEX_CHANGE_ENDPOINT), any()))
+        .thenReturn(new HttpResult(FAILED, EMPTY_MSG));
+    assertThat(forwarder.indexChange(PROJECT_NAME, CHANGE_NUMBER, new IndexEvent())).isFalse();
   }
 
   @Test
   public void testIndexChangeThrowsException() throws Exception {
-    doThrow(new IOException()).when(httpSessionMock).post(INDEX_CHANGE_ENDPOINT);
-    assertThat(forwarder.indexChange(PROJECT_NAME, CHANGE_NUMBER)).isFalse();
+    doThrow(new IOException()).when(httpSessionMock).post(eq(INDEX_CHANGE_ENDPOINT), any());
+    assertThat(forwarder.indexChange(PROJECT_NAME, CHANGE_NUMBER, new IndexEvent())).isFalse();
   }
 
   @Test
   public void testChangeDeletedFromIndexOK() throws Exception {
-    when(httpSessionMock.delete(DELETE_CHANGE_ENDPOINT))
+    when(httpSessionMock.delete(eq(DELETE_CHANGE_ENDPOINT), any()))
         .thenReturn(new HttpResult(SUCCESSFUL, EMPTY_MSG));
-    assertThat(forwarder.deleteChangeFromIndex(CHANGE_NUMBER)).isTrue();
+    assertThat(forwarder.deleteChangeFromIndex(CHANGE_NUMBER, new IndexEvent())).isTrue();
   }
 
   @Test
   public void testChangeDeletedFromIndexFailed() throws Exception {
-    when(httpSessionMock.delete(DELETE_CHANGE_ENDPOINT))
+    when(httpSessionMock.delete(eq(DELETE_CHANGE_ENDPOINT), any()))
         .thenReturn(new HttpResult(FAILED, EMPTY_MSG));
-    assertThat(forwarder.deleteChangeFromIndex(CHANGE_NUMBER)).isFalse();
+    assertThat(forwarder.deleteChangeFromIndex(CHANGE_NUMBER, new IndexEvent())).isFalse();
   }
 
   @Test
   public void testChangeDeletedFromThrowsException() throws Exception {
-    doThrow(new IOException()).when(httpSessionMock).delete(DELETE_CHANGE_ENDPOINT);
-    assertThat(forwarder.deleteChangeFromIndex(CHANGE_NUMBER)).isFalse();
+    doThrow(new IOException()).when(httpSessionMock).delete(eq(DELETE_CHANGE_ENDPOINT), any());
+    assertThat(forwarder.deleteChangeFromIndex(CHANGE_NUMBER, new IndexEvent())).isFalse();
   }
 
   @Test
   public void testEventSentOK() throws Exception {
-    when(httpSessionMock.post(EVENT_ENDPOINT, eventJson))
+    when(httpSessionMock.post(EVENT_ENDPOINT, event))
         .thenReturn(new HttpResult(SUCCESSFUL, EMPTY_MSG));
     assertThat(forwarder.send(event)).isTrue();
   }
 
   @Test
   public void testEventSentFailed() throws Exception {
-    when(httpSessionMock.post(EVENT_ENDPOINT, eventJson))
-        .thenReturn(new HttpResult(FAILED, EMPTY_MSG));
+    when(httpSessionMock.post(EVENT_ENDPOINT, event)).thenReturn(new HttpResult(FAILED, EMPTY_MSG));
     assertThat(forwarder.send(event)).isFalse();
   }
 
   @Test
   public void testEventSentThrowsException() throws Exception {
-    doThrow(new IOException()).when(httpSessionMock).post(EVENT_ENDPOINT, eventJson);
+    doThrow(new IOException()).when(httpSessionMock).post(EVENT_ENDPOINT, event);
     assertThat(forwarder.send(event)).isFalse();
   }
 
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/index/IndexEventHandlerTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/index/IndexEventHandlerTest.java
index 39d7128..43c2fd7 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/index/IndexEventHandlerTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/index/IndexEventHandlerTest.java
@@ -15,6 +15,8 @@
 package com.ericsson.gerrit.plugins.highavailability.index;
 
 import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
@@ -63,25 +65,25 @@
   @Test
   public void shouldIndexInRemoteOnChangeIndexedEvent() throws Exception {
     indexEventHandler.onChangeIndexed(PROJECT_NAME, changeId.get());
-    verify(forwarder).indexChange(PROJECT_NAME, CHANGE_ID);
+    verify(forwarder).indexChange(eq(PROJECT_NAME), eq(CHANGE_ID), any());
   }
 
   @Test
   public void shouldIndexInRemoteOnAccountIndexedEvent() throws Exception {
     indexEventHandler.onAccountIndexed(accountId.get());
-    verify(forwarder).indexAccount(ACCOUNT_ID);
+    verify(forwarder).indexAccount(eq(ACCOUNT_ID), any());
   }
 
   @Test
   public void shouldDeleteFromIndexInRemoteOnChangeDeletedEvent() throws Exception {
     indexEventHandler.onChangeDeleted(changeId.get());
-    verify(forwarder).deleteChangeFromIndex(CHANGE_ID);
+    verify(forwarder).deleteChangeFromIndex(eq(CHANGE_ID), any());
   }
 
   @Test
   public void shouldIndexInRemoteOnGroupIndexedEvent() throws Exception {
     indexEventHandler.onGroupIndexed(accountGroupUUID.get());
-    verify(forwarder).indexGroup(UUID);
+    verify(forwarder).indexGroup(eq(UUID), any());
   }
 
   @Test
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/websession/file/FileBasedWebSessionCacheTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/websession/file/FileBasedWebSessionCacheTest.java
index bccf300..d29bb99 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/websession/file/FileBasedWebSessionCacheTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/websession/file/FileBasedWebSessionCacheTest.java
@@ -127,7 +127,7 @@
   public void getIfPresentInvalidKeyTest() throws Exception {
     loadKeyToCacheDir(INVALID_KEY);
     Path path = websessionDir.resolve(INVALID_KEY);
-    assertThat(cache.getIfPresent((Object) path)).isNull();
+    assertThat(cache.getIfPresent(path.toString())).isNull();
   }
 
   @Test
diff --git a/tools/BUILD b/tools/BUILD
index e69de29..c5ed0b7 100644
--- a/tools/BUILD
+++ b/tools/BUILD
@@ -0,0 +1 @@
+# Empty file required by Bazel
diff --git a/tools/bzl/BUILD b/tools/bzl/BUILD
index e69de29..c5ed0b7 100644
--- a/tools/bzl/BUILD
+++ b/tools/bzl/BUILD
@@ -0,0 +1 @@
+# Empty file required by Bazel