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Posted to mapreduce-issues@hadoop.apache.org by "Ramkumar Vadali (JIRA)" <ji...@apache.org> on 2010/09/29 02:35:35 UTC

[jira] Commented: (MAPREDUCE-1908) DistributedRaidFileSystem does not handle ChecksumException correctly

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1908?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12915981#action_12915981 ] 

Ramkumar Vadali commented on MAPREDUCE-1908:
--------------------------------------------

ant test result:

All but org.apache.hadoop.streaming.TestUlimit passed. TestUlimit failure is unrelated to this.


ant test-patch result:

     [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 2 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 warnings.
     [exec] 
     [exec]     +1 release audit.  The applied patch does not increase the total number of release audit warnings.
     [exec] 
     [exec]     +1 system tests framework.  The patch passed system tests framework compile.
     [exec] 
     [exec] 
     [exec] 
     [exec] 
     [exec] ======================================================================
     [exec] ======================================================================
     [exec]     Finished build.
     [exec] ======================================================================
     [exec] ======================================================================


> DistributedRaidFileSystem does not handle ChecksumException correctly
> ---------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1908
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1908
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Ramkumar Vadali
>            Assignee: Ramkumar Vadali
>         Attachments: MAPREDUCE-1908.patch
>
>
> ChecksumException reports the offset of corruption within a block,
> whereas DistributedRaidFileSystem.setAlternateLocations was expecting it
> to report the offset of corruption within the file.
> The best way of dealing with a missing block/corrupt block is to just
> use the current seek offset in the file as the position of corruption.

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