@Override
  public void shutdown() throws ReplicationException {
    if (cloudStorageCompactor != null) {
      cloudStorageCompactor.shutdown();
      Utils.shutDownExecutorService(cloudCompactionScheduler, cloudConfig.cloudBlobCompactionShutdownTimeoutSecs,
          TimeUnit.SECONDS);
    }
    super.shutdown();
  }
Remove a replica of given {@link PartitionId} and its {@link RemoteReplicaInfo}s from the backup list.
@param partitionId the {@link PartitionId} of the replica to removed.
ambry-cloud/src/main/java/com/github/ambry/cloud/VcrReplicationManager.java