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https://issues.apache.org/jira/browse/HDFS-12942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16300648#comment-16300648
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Arpit Agarwal commented on HDFS-12942:
--------------------------------------
The v3 patch looks good to me. Very minor comment on the unit test
{{testMoveBlockFailure}}. The following log message should say
testMoveBlockFailure.
{code}
} catch (Exception ex) {
LOG.info("Exception in testMoveBlockSuccess ", ex);
{code}
+1 otherwise.
> 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
> Attachments: HDFS-12942.001.patch, HDFS-12942.002.patch,
> HDFS-12942.003.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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