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https://issues.apache.org/jira/browse/HDFS-12942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16349453#comment-16349453
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Anu Engineer commented on HDFS-12942:
-------------------------------------

[~virajith], [~arpitagarwal] if you folks have no other comments, I would like 
to commit this patch.

I am +1 on this patch. I have run the tests locally too and can confirm the 
moveBlock tests are passing.

 

> 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, 
> HDFS-12942.006.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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