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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1080) PigStorage may miss records when loading a file
Date Wed, 11 Nov 2009 04:25:27 GMT

    [ https://issues.apache.org/jira/browse/PIG-1080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12776267#action_12776267
] 

Hadoop QA commented on PIG-1080:
--------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12424531/PIG-1080.patch
  against trunk revision 834285.

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

    +1 tests included.  The patch appears to include 3 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

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

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

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

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

Test results: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h7.grid.sp2.yahoo.net/147/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h7.grid.sp2.yahoo.net/147/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h7.grid.sp2.yahoo.net/147/console

This message is automatically generated.

> PigStorage may miss records when loading a file
> -----------------------------------------------
>
>                 Key: PIG-1080
>                 URL: https://issues.apache.org/jira/browse/PIG-1080
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.6.0
>            Reporter: Richard Ding
>            Assignee: Richard Ding
>         Attachments: PIG-1080.patch, PIG-1080.patch, PIG-1080.patch
>
>
> When a file is assigned to multiple mappers (one block per mapper), the blocks may not
end at the exact record boundary. Special care is taken to ensure that all records are loaded
by mappers (and exactly once), even for records that cross the block boundary. 
> The PigStorage, however, doesn't correctly handle the case where a block ends at exactly
record boundary and results in missing records.
>  

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