diff --git a/setup_local_env/README.md b/setup_local_env/README.md
index e6ec9e7..8d9665f 100644
--- a/setup_local_env/README.md
+++ b/setup_local_env/README.md
@@ -74,7 +74,7 @@
 [--gerrit2-httpd-port]          Gerrit Instance 2 http port; default 18081
 [--gerrit2-sshd-port]           Gerrit Instance 2 sshd port; default 49418
 
-[--replication-delay]           Replication delay across the two instances in seconds
+[--replication-delay]           Replication delay across the two instances in seconds; default 5 seconds
 
 [--just-cleanup-env]            Cleans up previous deployment; default false
 
diff --git a/src/main/java/com/googlesource/gerrit/plugins/multisite/index/ChangeChecker.java b/src/main/java/com/googlesource/gerrit/plugins/multisite/index/ChangeChecker.java
index 3277150..4a081d0 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/multisite/index/ChangeChecker.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/multisite/index/ChangeChecker.java
@@ -27,7 +27,7 @@
    *
    * @return notes of the Change
    */
-  public Optional<ChangeNotes> getChangeNotes();
+  Optional<ChangeNotes> getChangeNotes();
 
   /**
    * Create a new index event POJO associated with the current Change.
@@ -39,7 +39,7 @@
    * @return new IndexEvent
    * @throws IOException if the current Change cannot read
    */
-  public Optional<ChangeIndexEvent> newIndexEvent(String projectName, int changeId, boolean deleted)
+  Optional<ChangeIndexEvent> newIndexEvent(String projectName, int changeId, boolean deleted)
       throws IOException;
 
   /**
@@ -48,7 +48,7 @@
    * @param indexEvent indexing event
    * @return true if the local Change is up-to-date, false otherwise.
    */
-  public boolean isUpToDate(Optional<ChangeIndexEvent> indexEvent);
+  boolean isUpToDate(Optional<ChangeIndexEvent> indexEvent);
 
   /**
    * Return the last computed up-to-date Change time-stamp.
@@ -58,12 +58,12 @@
    * @return the Change timestamp epoch in seconds
    * @throws IOException if an I/O error occurred while reading the local Change
    */
-  public Optional<Long> getComputedChangeTs() throws IOException;
+  Optional<Long> getComputedChangeTs() throws IOException;
 
   /**
    * Check if the local Change contains current patchset refs
    *
    * @return true if local change contains meta and current patchset refs
    */
-  public boolean isChangeConsistent();
+  boolean isChangeConsistent();
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/multisite/validation/ValidationModule.java b/src/main/java/com/googlesource/gerrit/plugins/multisite/validation/ValidationModule.java
index fc4d505..ed22855 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/multisite/validation/ValidationModule.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/multisite/validation/ValidationModule.java
@@ -20,6 +20,7 @@
 import com.gerritforge.gerrit.globalrefdb.validation.RefUpdateValidator;
 import com.gerritforge.gerrit.globalrefdb.validation.SharedRefDatabaseWrapper;
 import com.gerritforge.gerrit.globalrefdb.validation.SharedRefDbBatchRefUpdate;
+import com.gerritforge.gerrit.globalrefdb.validation.SharedRefDbExceptionHook;
 import com.gerritforge.gerrit.globalrefdb.validation.SharedRefDbGitRepositoryManager;
 import com.gerritforge.gerrit.globalrefdb.validation.SharedRefDbRefDatabase;
 import com.gerritforge.gerrit.globalrefdb.validation.SharedRefDbRefUpdate;
@@ -30,6 +31,8 @@
 import com.gerritforge.gerrit.globalrefdb.validation.dfsrefdb.SharedRefEnforcement;
 import com.google.common.collect.ImmutableSet;
 import com.google.gerrit.extensions.config.FactoryModule;
+import com.google.gerrit.extensions.registration.DynamicSet;
+import com.google.gerrit.server.ExceptionHook;
 import com.google.gerrit.server.config.RepositoryConfig;
 import com.google.inject.Scopes;
 import com.google.inject.TypeLiteral;
@@ -73,5 +76,7 @@
           .to(CustomSharedRefEnforcementByProject.class)
           .in(Scopes.SINGLETON);
     }
+
+    DynamicSet.bind(binder(), ExceptionHook.class).to(SharedRefDbExceptionHook.class);
   }
 }
diff --git a/src/main/resources/Documentation/about.md b/src/main/resources/Documentation/about.md
index d7c5648..7cd3f5c 100644
--- a/src/main/resources/Documentation/about.md
+++ b/src/main/resources/Documentation/about.md
@@ -16,12 +16,7 @@
 * connected to the same message broker
 * behind a load balancer (e.g., HAProxy)
 
-Currently, the mode supported is one primary read/write master and multiple
-read-only masters but eventually the plan is to support `n` read/write masters.
-The read/write master is handling any traffic while the
-read-only masters are serving the Gerrit GUI assets, the HTTP GET REST API and
-git-upload-pack. The read-only masters are kept updated to be always
-ready to become a read/write master.
+Currently, the plugin can support multiple read/write masters as required.
 
 The areas of alignment between the masters are: