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From "Ajay Kumar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12942) Synchronization issue in FSDataSetImpl#moveBlock
Date Fri, 02 Feb 2018 16:25:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16350603#comment-16350603
] 

Ajay Kumar commented on HDFS-12942:
-----------------------------------

[~anu] thanks for review and commit, [~virajith],[~arpitagarwal] thanks for reviews.

> 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
>             Fix For: 3.0.1
>
>         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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