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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1486) Configuration data should be preserved within the same MapTask
Date Fri, 19 Feb 2010 04:47:28 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12835584#action_12835584
] 

Hadoop QA commented on MAPREDUCE-1486:
--------------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12435649/MAPREDUCE-1486.patch
  against trunk revision 911519.

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

    +1 tests included.  The patch appears to include 2 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/Mapreduce-Patch-h3.grid.sp2.yahoo.net/328/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h3.grid.sp2.yahoo.net/328/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h3.grid.sp2.yahoo.net/328/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h3.grid.sp2.yahoo.net/328/console

This message is automatically generated.

> Configuration data should be preserved within the same MapTask
> --------------------------------------------------------------
>
>                 Key: MAPREDUCE-1486
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1486
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: task
>            Reporter: Aaron Kimball
>            Assignee: Aaron Kimball
>         Attachments: MAPREDUCE-1486.patch
>
>
> Map tasks involve a number of Contexts -- at least a TaskAttemptContext and a MapContext.
These context objects contain a Configuration each; when one context is initialized, it initializes
its own Configuration by deep-copying a previous Configuration.
> If one Context instance is used entirely prior to a second, more specific Context then
the second Context should contain the configuration data initialized in the previous Context.
This specifically affects the interaction between an InputFormat and its RecordReader instance(s).

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