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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1717) Federation: FSDataset volumeMap access is not correctly synchronized
Date Thu, 03 Mar 2011 23:46:37 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13002331#comment-13002331
] 

Suresh Srinivas commented on HDFS-1717:
---------------------------------------

     [exec] -1 overall.  
     [exec] 
     [exec]     +1 @author.  The patch does not contain any @author tags.
     [exec] 
     [exec]     +1 tests included.  The patch appears to include 6 new or modified tests.
     [exec] 
     [exec]     +1 javadoc.  The javadoc tool did not generate any warning messages.
     [exec] 
     [exec]     +1 javac.  The applied patch does not increase the total number of javac compiler
warnings.
     [exec] 
     [exec]     +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.8)
warnings.
     [exec] 
     [exec]     +1 release audit.  The applied patch does not increase the total number of
release audit warnings.
     [exec] 
     [exec]     -1 system test framework.  The patch failed system test framework compile.

The -1 in system test framework is not related to this patch. It is not expected after merging
trunk to federation branch.



> Federation: FSDataset volumeMap access is not correctly synchronized 
> ---------------------------------------------------------------------
>
>                 Key: HDFS-1717
>                 URL: https://issues.apache.org/jira/browse/HDFS-1717
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: data-node
>    Affects Versions: Federation Branch
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>             Fix For: Federation Branch
>
>         Attachments: HDFS-1717.1.patch, HDFS-1717.2.patch, HDFS-1717.patch
>
>
> FSDataset volumeMap access has several issues:
> # Access to it is not synchronized all the time, using FSDataset.this as lock, as expected.
> # It is synchronized using different locks.

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