swamirishi commented on code in PR #7402:
URL: https://github.com/apache/ozone/pull/7402#discussion_r1847194519


##########
hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/freon/ClosedContainerReplicator.java:
##########
@@ -82,66 +84,74 @@ public class ClosedContainerReplicator extends 
BaseFreonGenerator implements
   private ContainerReplicator replicator;
 
   private Timer timer;
+  private ReferenceCountedHandle<MasterVolumeMetadataStore> 
masterVolumeMetadataStoreReferenceCountedDB;
 
   private List<ReplicationTask> replicationTasks;
 
   @Override
   public Void call() throws Exception {
 
-    OzoneConfiguration conf = createOzoneConfiguration();
+    try {
+      OzoneConfiguration conf = createOzoneConfiguration();
 
-    final Collection<String> datanodeStorageDirs =
-        HddsServerUtil.getDatanodeStorageDirs(conf);
+      final Collection<String> datanodeStorageDirs =
+          HddsServerUtil.getDatanodeStorageDirs(conf);

Review Comment:
   done



##########
hadoop-hdds/framework/src/main/java/org/apache/hadoop/hdds/utils/db/DBTestUtils.java:
##########
@@ -0,0 +1,142 @@
+package org.apache.hadoop.hdds.utils.db;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ *
+ */
+
+import org.apache.hadoop.hdds.utils.MetadataKeyFilters;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Util class for mocking DB interactions happening in various tests.
+ */
+public final class DBTestUtils {
+
+  private DBTestUtils() {
+
+  }
+
+  public static <KEY, VALUE> Table<KEY, VALUE> getInMemoryTableForTest() {
+    return new Table<KEY, VALUE>() {
+      private final Map<KEY, VALUE> map = new ConcurrentHashMap<>();

Review Comment:
   done



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