Merge branch 'stable-3.1'

* stable-3.1:
  ElasticV6QueryChangesTest: Align with changes done in V7
  Update git submodules
  Update git submodules
  ElasticV6QueryChangesTest: Close indices after test
  Update git submodules
  Switch PatchListCache to using legacy cache backend
  Replace guava caches with caffeine
  Fix undefined branch in create-destination-dialog
  Add support for Elasticsearch version 7.5.*

Change-Id: I436f3a67ce12ed618b48c30b02af5028b822d767
diff --git a/WORKSPACE b/WORKSPACE
index e370f69..307e28c 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -235,6 +235,31 @@
     sha1 = GUAVA_BIN_SHA1,
 )
 
+CAFFEINE_VERS = "2.8.0"
+
+maven_jar(
+    name = "caffeine",
+    artifact = "com.github.ben-manes.caffeine:caffeine:" + CAFFEINE_VERS,
+    sha1 = "6000774d7f8412ced005a704188ced78beeed2bb",
+)
+
+# TODO(davido): Rename guava.jar to caffeine-guava.jar on fetch to prevent potential
+# naming collision between caffeine guava adapater and guava library itself.
+# Remove this renaming procedure, once this upstream issue is fixed:
+# https://github.com/ben-manes/caffeine/issues/364.
+http_file(
+    name = "caffeine-guava-renamed",
+    downloaded_file_path = "caffeine-guava-" + CAFFEINE_VERS + ".jar",
+    sha256 = "3a66ee3ec70971dee0bae6e56bda7b8742bc4bedd7489161bfbbaaf7137d89e1",
+    urls = [
+        "https://repo1.maven.org/maven2/com/github/ben-manes/caffeine/guava/" +
+        CAFFEINE_VERS +
+        "/guava-" +
+        CAFFEINE_VERS +
+        ".jar",
+    ],
+)
+
 maven_jar(
     name = "guava-failureaccess",
     artifact = "com.google.guava:failureaccess:1.0.1",
diff --git a/java/com/google/gerrit/elasticsearch/ElasticVersion.java b/java/com/google/gerrit/elasticsearch/ElasticVersion.java
index 309ee3e5..574a226 100644
--- a/java/com/google/gerrit/elasticsearch/ElasticVersion.java
+++ b/java/com/google/gerrit/elasticsearch/ElasticVersion.java
@@ -30,7 +30,8 @@
   V7_1("7.1.*"),
   V7_2("7.2.*"),
   V7_3("7.3.*"),
-  V7_4("7.4.*");
+  V7_4("7.4.*"),
+  V7_5("7.5.*");
 
   private final String version;
   private final Pattern pattern;
diff --git a/javatests/com/google/gerrit/acceptance/pgm/ElasticReindexIT.java b/javatests/com/google/gerrit/acceptance/pgm/ElasticReindexIT.java
index dcdca86..eeeacab 100644
--- a/javatests/com/google/gerrit/acceptance/pgm/ElasticReindexIT.java
+++ b/javatests/com/google/gerrit/acceptance/pgm/ElasticReindexIT.java
@@ -37,7 +37,7 @@
 
   @ConfigSuite.Config
   public static Config elasticsearchV7() {
-    return getConfig(ElasticVersion.V7_4);
+    return getConfig(ElasticVersion.V7_5);
   }
 
   @Override
diff --git a/javatests/com/google/gerrit/acceptance/ssh/ElasticIndexIT.java b/javatests/com/google/gerrit/acceptance/ssh/ElasticIndexIT.java
index 1c41b55..1940274 100644
--- a/javatests/com/google/gerrit/acceptance/ssh/ElasticIndexIT.java
+++ b/javatests/com/google/gerrit/acceptance/ssh/ElasticIndexIT.java
@@ -38,7 +38,7 @@
 
   @ConfigSuite.Config
   public static Config elasticsearchV7() {
-    return getConfig(ElasticVersion.V7_4);
+    return getConfig(ElasticVersion.V7_5);
   }
 
   @Override
diff --git a/javatests/com/google/gerrit/elasticsearch/ElasticContainer.java b/javatests/com/google/gerrit/elasticsearch/ElasticContainer.java
index c15f1a7..c692a3b 100644
--- a/javatests/com/google/gerrit/elasticsearch/ElasticContainer.java
+++ b/javatests/com/google/gerrit/elasticsearch/ElasticContainer.java
@@ -62,6 +62,8 @@
         return "blacktop/elasticsearch:7.3.2";
       case V7_4:
         return "blacktop/elasticsearch:7.4.2";
+      case V7_5:
+        return "blacktop/elasticsearch:7.5.0";
     }
     throw new IllegalStateException("No tests for version: " + version.name());
   }
diff --git a/javatests/com/google/gerrit/elasticsearch/ElasticV6QueryChangesTest.java b/javatests/com/google/gerrit/elasticsearch/ElasticV6QueryChangesTest.java
index da64d53..1601756 100644
--- a/javatests/com/google/gerrit/elasticsearch/ElasticV6QueryChangesTest.java
+++ b/javatests/com/google/gerrit/elasticsearch/ElasticV6QueryChangesTest.java
@@ -14,6 +14,8 @@
 
 package com.google.gerrit.elasticsearch;
 
+import static java.util.concurrent.TimeUnit.MINUTES;
+
 import com.google.gerrit.elasticsearch.ElasticTestUtils.ElasticNodeInfo;
 import com.google.gerrit.server.query.change.AbstractQueryChangesTest;
 import com.google.gerrit.testing.ConfigSuite;
@@ -22,7 +24,12 @@
 import com.google.gerrit.testing.IndexConfig;
 import com.google.inject.Guice;
 import com.google.inject.Injector;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.client.protocol.HttpClientContext;
+import org.apache.http.impl.nio.client.CloseableHttpAsyncClient;
+import org.apache.http.impl.nio.client.HttpAsyncClients;
 import org.eclipse.jgit.lib.Config;
+import org.junit.After;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Rule;
@@ -35,6 +42,7 @@
 
   private static ElasticNodeInfo nodeInfo;
   private static ElasticContainer container;
+  private static CloseableHttpAsyncClient client;
 
   @BeforeClass
   public static void startIndexService() {
@@ -45,6 +53,8 @@
 
     container = ElasticContainer.createAndStart(ElasticVersion.V6_8);
     nodeInfo = new ElasticNodeInfo(container.getHttpHost().getPort());
+    client = HttpAsyncClients.createDefault();
+    client.start();
   }
 
   @AfterClass
@@ -56,6 +66,19 @@
 
   @Rule public final GerritTestName testName = new GerritTestName();
 
+  @After
+  public void closeIndex() throws Exception {
+    client
+        .execute(
+            new HttpPost(
+                String.format(
+                    "http://localhost:%d/%s*/_close",
+                    nodeInfo.port, testName.getSanitizedMethodName())),
+            HttpClientContext.create(),
+            null)
+        .get(5, MINUTES);
+  }
+
   @Override
   protected void initAfterLifecycleStart() throws Exception {
     super.initAfterLifecycleStart();
diff --git a/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryAccountsTest.java b/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryAccountsTest.java
index 021a80d..c55417e 100644
--- a/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryAccountsTest.java
+++ b/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryAccountsTest.java
@@ -41,7 +41,7 @@
       return;
     }
 
-    container = ElasticContainer.createAndStart(ElasticVersion.V7_4);
+    container = ElasticContainer.createAndStart(ElasticVersion.V7_5);
     nodeInfo = new ElasticNodeInfo(container.getHttpHost().getPort());
   }
 
diff --git a/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryChangesTest.java b/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryChangesTest.java
index 6bb2f8fb..b4feb32 100644
--- a/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryChangesTest.java
+++ b/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryChangesTest.java
@@ -51,7 +51,7 @@
       return;
     }
 
-    container = ElasticContainer.createAndStart(ElasticVersion.V7_4);
+    container = ElasticContainer.createAndStart(ElasticVersion.V7_5);
     nodeInfo = new ElasticNodeInfo(container.getHttpHost().getPort());
     client = HttpAsyncClients.createDefault();
     client.start();
diff --git a/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryGroupsTest.java b/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryGroupsTest.java
index 9312f01..c2d6246 100644
--- a/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryGroupsTest.java
+++ b/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryGroupsTest.java
@@ -41,7 +41,7 @@
       return;
     }
 
-    container = ElasticContainer.createAndStart(ElasticVersion.V7_4);
+    container = ElasticContainer.createAndStart(ElasticVersion.V7_5);
     nodeInfo = new ElasticNodeInfo(container.getHttpHost().getPort());
   }
 
diff --git a/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryProjectsTest.java b/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryProjectsTest.java
index 4b9ede8..2fc4366 100644
--- a/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryProjectsTest.java
+++ b/javatests/com/google/gerrit/elasticsearch/ElasticV7QueryProjectsTest.java
@@ -41,7 +41,7 @@
       return;
     }
 
-    container = ElasticContainer.createAndStart(ElasticVersion.V7_4);
+    container = ElasticContainer.createAndStart(ElasticVersion.V7_5);
     nodeInfo = new ElasticNodeInfo(container.getHttpHost().getPort());
   }
 
diff --git a/javatests/com/google/gerrit/elasticsearch/ElasticVersionTest.java b/javatests/com/google/gerrit/elasticsearch/ElasticVersionTest.java
index f9cfe35..5d2f99c 100644
--- a/javatests/com/google/gerrit/elasticsearch/ElasticVersionTest.java
+++ b/javatests/com/google/gerrit/elasticsearch/ElasticVersionTest.java
@@ -60,6 +60,9 @@
 
     assertThat(ElasticVersion.forVersion("7.4.0")).isEqualTo(ElasticVersion.V7_4);
     assertThat(ElasticVersion.forVersion("7.4.1")).isEqualTo(ElasticVersion.V7_4);
+
+    assertThat(ElasticVersion.forVersion("7.5.0")).isEqualTo(ElasticVersion.V7_5);
+    assertThat(ElasticVersion.forVersion("7.5.1")).isEqualTo(ElasticVersion.V7_5);
   }
 
   @Test
@@ -89,6 +92,7 @@
     assertThat(ElasticVersion.V7_2.isAtLeastMinorVersion(ElasticVersion.V6_7)).isFalse();
     assertThat(ElasticVersion.V7_3.isAtLeastMinorVersion(ElasticVersion.V6_7)).isFalse();
     assertThat(ElasticVersion.V7_4.isAtLeastMinorVersion(ElasticVersion.V6_7)).isFalse();
+    assertThat(ElasticVersion.V7_5.isAtLeastMinorVersion(ElasticVersion.V6_7)).isFalse();
   }
 
   @Test
@@ -106,6 +110,7 @@
     assertThat(ElasticVersion.V7_2.isV6OrLater()).isTrue();
     assertThat(ElasticVersion.V7_3.isV6OrLater()).isTrue();
     assertThat(ElasticVersion.V7_4.isV6OrLater()).isTrue();
+    assertThat(ElasticVersion.V7_5.isV6OrLater()).isTrue();
   }
 
   @Test
@@ -123,5 +128,6 @@
     assertThat(ElasticVersion.V7_2.isV7OrLater()).isTrue();
     assertThat(ElasticVersion.V7_3.isV7OrLater()).isTrue();
     assertThat(ElasticVersion.V7_4.isV7OrLater()).isTrue();
+    assertThat(ElasticVersion.V7_5.isV7OrLater()).isTrue();
   }
 }
diff --git a/tools/nongoogle.bzl b/tools/nongoogle.bzl
index 1dfc2f4..6a29da6 100644
--- a/tools/nongoogle.bzl
+++ b/tools/nongoogle.bzl
@@ -69,8 +69,8 @@
     # elasticsearch-rest-client explicitly depends on this version
     maven_jar(
         name = "httpcore-nio",
-        artifact = "org.apache.httpcomponents:httpcore-nio:4.4.11",
-        sha1 = "7d0a97d01d39cff9aa3e6db81f21fddb2435f4e6",
+        artifact = "org.apache.httpcomponents:httpcore-nio:4.4.12",
+        sha1 = "84cd29eca842f31db02987cfedea245af020198b",
     )
 
     maven_jar(
@@ -102,8 +102,8 @@
     # and httpasyncclient as necessary.
     maven_jar(
         name = "elasticsearch-rest-client",
-        artifact = "org.elasticsearch.client:elasticsearch-rest-client:7.4.2",
-        sha1 = "f48725523c0b3402f869214433602f8d3f4c737c",
+        artifact = "org.elasticsearch.client:elasticsearch-rest-client:7.5.0",
+        sha1 = "62535b6fc3a4e943e88e7640eac22e29f03a696d",
     )
 
     maven_jar(