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https://issues.apache.org/jira/browse/HDFS-12942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16340102#comment-16340102
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Virajith Jalaparti commented on HDFS-12942:
-------------------------------------------

Thanks for the updated patch [~ajayydv]. A couple of issues with patch v5 that 
are causing the failed tests.
{code:java}
+      FsVolumeImpl volume = (FsVolumeImpl) newReplicaInfo.getVolume();
+      volume.incDfsUsedAndNumBlocks(bpid, newReplicaInfo.getBytesOnDisk())
{code}
This shouldn't be added to {{finalizeReplica}}. This should be called in 
{{finalizeNewReplica}} if  {{finalizeReplica}} succeeds.

Also, after the deletions in the catch block in {{finalizeNewReplica}}, the 
exception has to be re-thrown.


> Synchronization issue in FSDataSetImpl#moveBlock
> ------------------------------------------------
>
>                 Key: HDFS-12942
>                 URL: https://issues.apache.org/jira/browse/HDFS-12942
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Ajay Kumar
>            Assignee: Ajay Kumar
>            Priority: Major
>         Attachments: HDFS-12942.001.patch, HDFS-12942.002.patch, 
> HDFS-12942.003.patch, HDFS-12942.004.patch, HDFS-12942.005.patch
>
>
> FSDataSetImpl#moveBlock  works in following following 3 steps:
> # first creates a new replicaInfo object
> # calls finalizeReplica to finalize it.
> # Calls removeOldReplica to remove oldReplica.
> A client can potentially append to the old replica between step 1 and 2.



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