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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3748) Flag to make tasks to send counter information only at the end of the task
Date Tue, 02 Sep 2008 09:30:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12627615#action_12627615

Hadoop QA commented on HADOOP-3748:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision 691099.

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

    +1 tests included.  The patch appears to include 6 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 generated 306 release audit warnings (more than the
trunk's current 305 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/Hadoop-Patch/3157/testReport/
Release audit warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3157/artifact/trunk/current/releaseAuditDiffWarnings.txt
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3157/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3157/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3157/console

This message is automatically generated.

> Flag to make tasks to send counter information only at the end of the task
> --------------------------------------------------------------------------
>                 Key: HADOOP-3748
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3748
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>         Environment: all
>            Reporter: Alejandro Abdelnur
>         Attachments: [HADOOP-3748].patch
> Currently counters are streaming from the task to the jobtracker as the task progresses.
If the number of counters is large this has a significant impact on the network traffic as
well as in the JobTracker load.
> The should be a flag, for example by counter-group, that indicates that the counters
are to be reported at the end of the task. By default this flag should be set to false for
all counter-groups maintaining the current behavior.

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