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https://issues.apache.org/jira/browse/HDFS-457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12732789#action_12732789
 ] 

Hadoop QA commented on HDFS-457:
--------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12413868/HDFS-457.patch
  against trunk revision 794953.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 7 new or modified tests.

    -1 javadoc.  The javadoc tool appears to have generated 1 warning messages.

    +1 javac.  The applied patch does not increase the total number of javac 
compiler warnings.

    -1 findbugs.  The patch appears to introduce 1 new Findbugs warnings.

    -1 release audit.  The applied patch generated 285 release audit warnings 
(more than the trunk's current 282 warnings).

    -1 core tests.  The patch failed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: 
http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-vesta.apache.org/23/testReport/
Release audit warnings: 
http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-vesta.apache.org/23/artifact/trunk/current/releaseAuditDiffWarnings.txt
Findbugs warnings: 
http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-vesta.apache.org/23/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: 
http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-vesta.apache.org/23/artifact/trunk/build/test/checkstyle-errors.html
Console output: 
http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-vesta.apache.org/23/console

This message is automatically generated.

> better handling of volume failure in Data Node storage
> ------------------------------------------------------
>
>                 Key: HDFS-457
>                 URL: https://issues.apache.org/jira/browse/HDFS-457
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>            Reporter: Boris Shkolnik
>            Assignee: Boris Shkolnik
>         Attachments: HDFS-457.patch
>
>
> Current implementation shuts DataNode down completely when one of the 
> configured volumes of the storage fails.
> This is rather wasteful behavior because it  decreases utilization (good 
> storage becomes unavailable) and imposes extra load on the system 
> (replication of the blocks from the good volumes). These problems will become 
> even more prominent when we move to mixed (heterogeneous) clusters with many 
> more volumes per Data Node.

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