Method checkAndUpdate should also resolve duplicate replicas when memBlockInfo.metadataExists() return false

if (memBlockInfo.blockDataExists()) {
  if (memBlockInfo.getBlockURI().compareTo(diskFile.toURI()) != 0) {
    if (diskMetaFileExists) {
      if (memBlockInfo.metadataExists()) {
        // We have two sets of block+meta files. Decide which one to
        // keep.
        ReplicaInfo diskBlockInfo =
            new ReplicaBuilder(ReplicaState.FINALIZED)
              .setBlockId(blockId)
              .setLength(diskFile.length())
              .setGenerationStamp(diskGS)
              .setFsVolume(vol)
              .setDirectoryToUse(diskFile.getParentFile())
              .build();
        ((FsVolumeImpl) vol).resolveDuplicateReplicas(bpid,
            memBlockInfo, diskBlockInfo, volumeMap);
      }
    } else {
    // .....
}
      if (!fileIoProvider.delete(vol, diskFile)) {
        LOG.warn("Failed to delete " + diskFile);
      }
    }
  }
}