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Date: Mon, 25 Oct 2010 07:51:20 -0400 (EDT)
From: "Hadoop QA (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Subject: [jira] Commented: (MAPREDUCE-2141) Add an "extra data" field to
 Task for use by Mesos
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-2141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12924537#action_12924537 ] 

Hadoop QA commented on MAPREDUCE-2141:
--------------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12457646/mapreduce-2141-v2.patch
  against trunk revision 1026450.

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

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    +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 failed core unit tests.

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

    +1 system tests framework.  The patch passed system tests framework compile.

Test results: http://hudson.zones.apache.org/hudson/job/PreCommit-MAPREDUCE-Build/3/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/PreCommit-MAPREDUCE-Build/3/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/PreCommit-MAPREDUCE-Build/3/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/PreCommit-MAPREDUCE-Build/3/console

This message is automatically generated.

> Add an "extra data" field to Task for use by Mesos
> --------------------------------------------------
>
>                 Key: MAPREDUCE-2141
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2141
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Matei Zaharia
>            Assignee: Matei Zaharia
>            Priority: Minor
>         Attachments: mapreduce-2141-v1.patch, mapreduce-2141-v2.patch
>
>
> In order to support running Hadoop on the Mesos cluster manager (http://mesos.berkeley.edu/), I'd like to add an extra String field to the Task class to allow extra data (a Mesos task ID) to be associated with each task. This should have no impact on normal operation other than making the serialized form of Task a few bytes longer. In the Mesos support patch for Hadoop, this field is set by a pluggable Hadoop scheduler implementation to allow code on the TaskTracker side to see which Mesos task corresponds to each Hadoop task. 

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