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/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);
   }
 }