diff --git a/src/main/java/com/googlesource/gerrit/plugins/multisite/LibModuleLogFile.java b/src/main/java/com/googlesource/gerrit/plugins/multisite/LibModuleLogFile.java
new file mode 100644
index 0000000..106bcde
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/multisite/LibModuleLogFile.java
@@ -0,0 +1,32 @@
+// Copyright (C) 2019 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.googlesource.gerrit.plugins.multisite;
+
+import com.google.gerrit.server.util.SystemLog;
+import org.apache.log4j.AsyncAppender;
+import org.apache.log4j.Layout;
+import org.apache.log4j.LogManager;
+import org.apache.log4j.Logger;
+
+public abstract class LibModuleLogFile {
+
+  public LibModuleLogFile(SystemLog systemLog, String logName, Layout layout) {
+    AsyncAppender asyncAppender = systemLog.createAsyncAppender(logName, layout, true, true);
+    Logger logger = LogManager.getLogger(logName);
+    logger.removeAppender(logName);
+    logger.addAppender(asyncAppender);
+    logger.setAdditivity(false);
+  }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/multisite/Log4jSharedRefLogger.java b/src/main/java/com/googlesource/gerrit/plugins/multisite/Log4jSharedRefLogger.java
new file mode 100644
index 0000000..90380e3
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/multisite/Log4jSharedRefLogger.java
@@ -0,0 +1,87 @@
+// Copyright (C) 2019 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.googlesource.gerrit.plugins.multisite;
+
+import com.google.common.flogger.FluentLogger;
+import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.server.CommonConverters;
+import com.google.gerrit.server.OutputFormat;
+import com.google.gerrit.server.git.GitRepositoryManager;
+import com.google.gerrit.server.util.SystemLog;
+import com.google.gson.Gson;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+import java.io.IOException;
+import org.apache.log4j.PatternLayout;
+import org.eclipse.jgit.lib.ObjectId;
+import org.eclipse.jgit.lib.Ref;
+import org.eclipse.jgit.lib.Repository;
+import org.eclipse.jgit.revwalk.RevCommit;
+import org.eclipse.jgit.revwalk.RevWalk;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@Singleton
+public class Log4jSharedRefLogger extends LibModuleLogFile implements SharedRefLogger {
+  private static final String LOG_NAME = "sharedref_log";
+  private final Logger sharedRefDBLog;
+  private final GitRepositoryManager gitRepositoryManager;
+  private static final Gson gson = OutputFormat.JSON_COMPACT.newGson();
+
+  private static final FluentLogger logger = FluentLogger.forEnclosingClass();
+
+  @Inject
+  public Log4jSharedRefLogger(SystemLog systemLog, GitRepositoryManager gitRepositoryManager) {
+    super(systemLog, LOG_NAME, new PatternLayout("[%d{ISO8601}] [%t] %-5p : %m%n"));
+    this.gitRepositoryManager = gitRepositoryManager;
+    sharedRefDBLog = LoggerFactory.getLogger(LOG_NAME);
+  }
+
+  @Override
+  public void logRefUpdate(String project, Ref currRef, ObjectId newRefValue) {
+    if (!ObjectId.zeroId().equals(newRefValue)) {
+      try (Repository repository =
+              gitRepositoryManager.openRepository(new Project.NameKey(project));
+          RevWalk walk = new RevWalk(repository)) {
+        RevCommit commit = walk.parseCommit(newRefValue);
+
+        sharedRefDBLog.info(
+            gson.toJson(
+                new SharedRefLogEntry.UpdateRef(
+                    project,
+                    currRef.getName(),
+                    currRef.getObjectId().getName(),
+                    newRefValue.getName(),
+                    CommonConverters.toGitPerson(commit.getCommitterIdent()),
+                    commit.getShortMessage())));
+      } catch (IOException e) {
+        logger.atSevere().withCause(e).log(
+            "Cannot log sharedRefDB interaction for ref %s on project %s",
+            currRef.getName(), project);
+      }
+
+    } else {
+      sharedRefDBLog.info(
+          gson.toJson(
+              new SharedRefLogEntry.DeleteRef(
+                  project, currRef.getName(), currRef.getObjectId().getName())));
+    }
+  }
+
+  @Override
+  public void logProjectDelete(String project) {
+    sharedRefDBLog.info(gson.toJson(new SharedRefLogEntry.DeleteProject(project)));
+  }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/multisite/SharedRefDatabaseWrapper.java b/src/main/java/com/googlesource/gerrit/plugins/multisite/SharedRefDatabaseWrapper.java
new file mode 100644
index 0000000..f59261e
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/multisite/SharedRefDatabaseWrapper.java
@@ -0,0 +1,71 @@
+// Copyright (C) 2019 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.googlesource.gerrit.plugins.multisite;
+
+import com.google.inject.Inject;
+import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.SharedLockException;
+import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.SharedRefDatabase;
+import java.io.IOException;
+import org.eclipse.jgit.lib.ObjectId;
+import org.eclipse.jgit.lib.Ref;
+
+public class SharedRefDatabaseWrapper implements SharedRefDatabase {
+
+  private final SharedRefDatabase sharedRefDb;
+  private final SharedRefLogger sharedRefLogger;
+
+  @Inject
+  public SharedRefDatabaseWrapper(
+      SharedRefDatabase sharedRefDatabase, SharedRefLogger sharedRefLogger) {
+    this.sharedRefDb = sharedRefDatabase;
+    this.sharedRefLogger = sharedRefLogger;
+  }
+
+  @Override
+  public boolean isUpToDate(String project, Ref ref) throws SharedLockException {
+    return sharedRefDb.isUpToDate(project, ref);
+  }
+
+  @Override
+  public boolean compareAndPut(String project, Ref currRef, ObjectId newRefValue)
+      throws IOException {
+    boolean succeeded = sharedRefDb.compareAndPut(project, currRef, newRefValue);
+    if (succeeded) {
+      sharedRefLogger.logRefUpdate(project, currRef, newRefValue);
+    }
+    return succeeded;
+  }
+
+  @Override
+  public boolean compareAndRemove(String project, Ref oldRef) throws IOException {
+    return sharedRefDb.compareAndRemove(project, oldRef);
+  }
+
+  @Override
+  public AutoCloseable lockRef(String project, String refName) throws SharedLockException {
+    return sharedRefDb.lockRef(project, refName);
+  }
+
+  @Override
+  public boolean exists(String project, String refName) {
+    return sharedRefDb.exists(project, refName);
+  }
+
+  @Override
+  public void removeProject(String project) throws IOException {
+    sharedRefDb.removeProject(project);
+    sharedRefLogger.logProjectDelete(project);
+  }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/multisite/SharedRefLogEntry.java b/src/main/java/com/googlesource/gerrit/plugins/multisite/SharedRefLogEntry.java
new file mode 100644
index 0000000..50c7949
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/multisite/SharedRefLogEntry.java
@@ -0,0 +1,75 @@
+// Copyright (C) 2019 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.googlesource.gerrit.plugins.multisite;
+
+import com.google.gerrit.extensions.common.GitPerson;
+
+public class SharedRefLogEntry {
+
+  public enum Type {
+    UPDATE_REF,
+    DELETE_REF,
+    DELETE_PROJECT
+  }
+
+  public String projectName;
+  public Type type;
+
+  public static class UpdateRef extends SharedRefLogEntry {
+
+    public String refName;
+    public String oldId;
+    public String newId;
+    public GitPerson committer;
+    public String comment;
+
+    UpdateRef(
+        String projectName,
+        String refName,
+        String oldId,
+        String newId,
+        GitPerson committer,
+        String comment) {
+      this.type = Type.UPDATE_REF;
+      this.projectName = projectName;
+      this.refName = refName;
+      this.oldId = oldId;
+      this.newId = newId;
+      this.committer = committer;
+      this.comment = comment;
+    }
+  }
+
+  public static class DeleteProject extends SharedRefLogEntry {
+
+    DeleteProject(String projectName) {
+      this.type = Type.DELETE_PROJECT;
+      this.projectName = projectName;
+    }
+  }
+
+  public static class DeleteRef extends SharedRefLogEntry {
+
+    public String refName;
+    public String oldId;
+
+    DeleteRef(String projectName, String refName, String oldId) {
+      this.type = Type.DELETE_REF;
+      this.projectName = projectName;
+      this.refName = refName;
+      this.oldId = oldId;
+    }
+  }
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/multisite/SharedRefLogger.java b/src/main/java/com/googlesource/gerrit/plugins/multisite/SharedRefLogger.java
new file mode 100644
index 0000000..0311a53
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/multisite/SharedRefLogger.java
@@ -0,0 +1,25 @@
+// Copyright (C) 2019 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.googlesource.gerrit.plugins.multisite;
+
+import org.eclipse.jgit.lib.ObjectId;
+import org.eclipse.jgit.lib.Ref;
+
+public interface SharedRefLogger {
+
+  void logRefUpdate(String project, Ref currRef, ObjectId newRefValue);
+
+  void logProjectDelete(String project);
+}
diff --git a/src/main/java/com/googlesource/gerrit/plugins/multisite/validation/BatchRefUpdateValidator.java b/src/main/java/com/googlesource/gerrit/plugins/multisite/validation/BatchRefUpdateValidator.java
index 33be190..15c0a13 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/multisite/validation/BatchRefUpdateValidator.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/multisite/validation/BatchRefUpdateValidator.java
@@ -17,6 +17,7 @@
 import com.google.common.flogger.FluentLogger;
 import com.google.inject.Inject;
 import com.google.inject.assistedinject.Assisted;
+import com.googlesource.gerrit.plugins.multisite.SharedRefDatabaseWrapper;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.SharedRefDatabase;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.SharedRefEnforcement;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.SharedRefEnforcement.EnforcePolicy;
@@ -43,7 +44,7 @@
 
   @Inject
   public BatchRefUpdateValidator(
-      SharedRefDatabase sharedRefDb,
+      SharedRefDatabaseWrapper sharedRefDb,
       ValidationMetrics validationMetrics,
       SharedRefEnforcement refEnforcement,
       @Assisted String projectName,
diff --git a/src/main/java/com/googlesource/gerrit/plugins/multisite/validation/RefUpdateValidator.java b/src/main/java/com/googlesource/gerrit/plugins/multisite/validation/RefUpdateValidator.java
index 15e8602..5330bca 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/multisite/validation/RefUpdateValidator.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/multisite/validation/RefUpdateValidator.java
@@ -20,6 +20,7 @@
 import com.google.common.flogger.FluentLogger;
 import com.google.inject.Inject;
 import com.google.inject.assistedinject.Assisted;
+import com.googlesource.gerrit.plugins.multisite.SharedRefDatabaseWrapper;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.OutOfSyncException;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.SharedDbSplitBrainException;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.SharedLockException;
@@ -36,7 +37,7 @@
 public class RefUpdateValidator {
   private static final FluentLogger logger = FluentLogger.forEnclosingClass();
 
-  protected final SharedRefDatabase sharedRefDb;
+  protected final SharedRefDatabaseWrapper sharedRefDb;
   protected final ValidationMetrics validationMetrics;
 
   protected final String projectName;
@@ -66,7 +67,7 @@
 
   @Inject
   public RefUpdateValidator(
-      SharedRefDatabase sharedRefDb,
+      SharedRefDatabaseWrapper sharedRefDb,
       ValidationMetrics validationMetrics,
       SharedRefEnforcement refEnforcement,
       @Assisted String projectName,
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 1dfc3f9..9626739 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 +20,8 @@
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.inject.Scopes;
 import com.googlesource.gerrit.plugins.multisite.Configuration;
+import com.googlesource.gerrit.plugins.multisite.Log4jSharedRefLogger;
+import com.googlesource.gerrit.plugins.multisite.SharedRefLogger;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.CustomSharedRefEnforcementByProject;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.DefaultSharedRefEnforcement;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.SharedRefEnforcement;
@@ -35,6 +37,8 @@
 
   @Override
   protected void configure() {
+    bind(SharedRefLogger.class).to(Log4jSharedRefLogger.class);
+
     factory(MultiSiteRepository.Factory.class);
     factory(MultiSiteRefDatabase.Factory.class);
     factory(MultiSiteRefUpdate.Factory.class);
diff --git a/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/BatchRefUpdateValidatorTest.java b/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/BatchRefUpdateValidatorTest.java
index bf5fc44..29c0a0c 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/BatchRefUpdateValidatorTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/BatchRefUpdateValidatorTest.java
@@ -19,6 +19,7 @@
 import static org.eclipse.jgit.transport.ReceiveCommand.Type.UPDATE;
 
 import com.google.gerrit.metrics.DisabledMetricMaker;
+import com.googlesource.gerrit.plugins.multisite.SharedRefDatabaseWrapper;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.DefaultSharedRefEnforcement;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.SharedRefDatabase;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.SharedRefEnforcement;
@@ -54,7 +55,7 @@
   private RevCommit B;
 
   ZookeeperTestContainerSupport zookeeperContainer;
-  ZkSharedRefDatabase zkSharedRefDatabase;
+  SharedRefDatabaseWrapper zkSharedRefDatabase;
 
   @Before
   public void setup() throws Exception {
@@ -79,11 +80,13 @@
     int NUMBER_OF_RETRIES = 5;
 
     zkSharedRefDatabase =
-        new ZkSharedRefDatabase(
-            zookeeperContainer.getCurator(),
-            new ZkConnectionConfig(
-                new RetryNTimes(NUMBER_OF_RETRIES, SLEEP_BETWEEN_RETRIES_MS),
-                TRANSACTION_LOCK_TIMEOUT));
+        new SharedRefDatabaseWrapper(
+            new ZkSharedRefDatabase(
+                zookeeperContainer.getCurator(),
+                new ZkConnectionConfig(
+                    new RetryNTimes(NUMBER_OF_RETRIES, SLEEP_BETWEEN_RETRIES_MS),
+                    TRANSACTION_LOCK_TIMEOUT)),
+            new DisabledSharedRefLogger());
   }
 
   @Test
diff --git a/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/DisabledSharedRefLogger.java b/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/DisabledSharedRefLogger.java
new file mode 100644
index 0000000..5fc66ad
--- /dev/null
+++ b/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/DisabledSharedRefLogger.java
@@ -0,0 +1,30 @@
+// Copyright (C) 2019 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.googlesource.gerrit.plugins.multisite.validation;
+
+import com.googlesource.gerrit.plugins.multisite.SharedRefLogger;
+import org.eclipse.jgit.lib.ObjectId;
+import org.eclipse.jgit.lib.Ref;
+import org.junit.Ignore;
+
+@Ignore
+public class DisabledSharedRefLogger implements SharedRefLogger {
+
+  @Override
+  public void logRefUpdate(String project, Ref currRef, ObjectId newRefValue) {}
+
+  @Override
+  public void logProjectDelete(String project) {}
+}
diff --git a/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/MultiSiteBatchRefUpdateTest.java b/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/MultiSiteBatchRefUpdateTest.java
index 9acedef..fb7b58d 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/MultiSiteBatchRefUpdateTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/MultiSiteBatchRefUpdateTest.java
@@ -23,8 +23,8 @@
 import static org.mockito.Mockito.verifyZeroInteractions;
 import static org.mockito.Mockito.when;
 
+import com.googlesource.gerrit.plugins.multisite.SharedRefDatabaseWrapper;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.DefaultSharedRefEnforcement;
-import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.SharedRefDatabase;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.zookeeper.RefFixture;
 import java.io.IOException;
 import java.util.Collections;
@@ -48,7 +48,7 @@
 @RunWith(MockitoJUnitRunner.class)
 public class MultiSiteBatchRefUpdateTest implements RefFixture {
 
-  @Mock SharedRefDatabase sharedRefDb;
+  @Mock SharedRefDatabaseWrapper sharedRefDb;
   @Mock BatchRefUpdate batchRefUpdate;
   @Mock RefDatabase refDatabase;
   @Mock RevWalk revWalk;
diff --git a/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/MultiSiteRefUpdateTest.java b/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/MultiSiteRefUpdateTest.java
index 8dcaf3a..74a45e1 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/MultiSiteRefUpdateTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/MultiSiteRefUpdateTest.java
@@ -21,9 +21,9 @@
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.verifyZeroInteractions;
 
+import com.googlesource.gerrit.plugins.multisite.SharedRefDatabaseWrapper;
 import com.googlesource.gerrit.plugins.multisite.validation.RefUpdateValidator.Factory;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.DefaultSharedRefEnforcement;
-import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.SharedRefDatabase;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.zookeeper.RefFixture;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.zookeeper.RefUpdateStub;
 import java.io.IOException;
@@ -46,7 +46,7 @@
 // working, and the other way around
 public class MultiSiteRefUpdateTest implements RefFixture {
 
-  @Mock SharedRefDatabase sharedRefDb;
+  @Mock SharedRefDatabaseWrapper sharedRefDb;
   @Mock ValidationMetrics validationMetrics;
   @Mock RefDatabase refDb;
 
diff --git a/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/RefUpdateValidatorTest.java b/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/RefUpdateValidatorTest.java
index 6fa7ed4..4177b02 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/RefUpdateValidatorTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/RefUpdateValidatorTest.java
@@ -22,6 +22,7 @@
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.verify;
 
+import com.googlesource.gerrit.plugins.multisite.SharedRefDatabaseWrapper;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.DefaultSharedRefEnforcement;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.OutOfSyncException;
 import com.googlesource.gerrit.plugins.multisite.validation.dfsrefdb.SharedDbSplitBrainException;
@@ -44,7 +45,7 @@
   private static final DefaultSharedRefEnforcement defaultRefEnforcement =
       new DefaultSharedRefEnforcement();
 
-  @Mock SharedRefDatabase sharedRefDb;
+  @Mock SharedRefDatabaseWrapper sharedRefDb;
 
   @Mock RefDatabase localRefDb;
 
diff --git a/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/dfsrefdb/zookeeper/ZkSharedRefDatabaseIT.java b/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/dfsrefdb/zookeeper/ZkSharedRefDatabaseIT.java
index cfa5476..3f10908 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/dfsrefdb/zookeeper/ZkSharedRefDatabaseIT.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/multisite/validation/dfsrefdb/zookeeper/ZkSharedRefDatabaseIT.java
@@ -20,7 +20,9 @@
 
 import com.google.gerrit.acceptance.AbstractDaemonTest;
 import com.google.gerrit.metrics.DisabledMetricMaker;
+import com.googlesource.gerrit.plugins.multisite.SharedRefDatabaseWrapper;
 import com.googlesource.gerrit.plugins.multisite.validation.BatchRefUpdateValidator;
+import com.googlesource.gerrit.plugins.multisite.validation.DisabledSharedRefLogger;
 import com.googlesource.gerrit.plugins.multisite.validation.MultiSiteBatchRefUpdate;
 import com.googlesource.gerrit.plugins.multisite.validation.ValidationMetrics;
 import com.googlesource.gerrit.plugins.multisite.validation.ZkConnectionConfig;
@@ -46,7 +48,7 @@
   @Rule public TestName nameRule = new TestName();
 
   ZookeeperTestContainerSupport zookeeperContainer;
-  ZkSharedRefDatabase zkSharedRefDatabase;
+  SharedRefDatabaseWrapper zkSharedRefDatabase;
   SharedRefEnforcement refEnforcement;
 
   int SLEEP_BETWEEN_RETRIES_MS = 30;
@@ -58,11 +60,13 @@
     refEnforcement = new DefaultSharedRefEnforcement();
     zookeeperContainer = new ZookeeperTestContainerSupport(false);
     zkSharedRefDatabase =
-        new ZkSharedRefDatabase(
-            zookeeperContainer.getCurator(),
-            new ZkConnectionConfig(
-                new RetryNTimes(NUMBER_OF_RETRIES, SLEEP_BETWEEN_RETRIES_MS),
-                TRANSACTION_LOCK_TIMEOUT));
+        new SharedRefDatabaseWrapper(
+            new ZkSharedRefDatabase(
+                zookeeperContainer.getCurator(),
+                new ZkConnectionConfig(
+                    new RetryNTimes(NUMBER_OF_RETRIES, SLEEP_BETWEEN_RETRIES_MS),
+                    TRANSACTION_LOCK_TIMEOUT)),
+            new DisabledSharedRefLogger());
   }
 
   @After