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From "Amareshwari Sriramadasu (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-5548) Observed negative running maps on the job tracker
Date Tue, 24 Mar 2009 10:21:50 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5548?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Amareshwari Sriramadasu updated HADOOP-5548:
--------------------------------------------

    Attachment: patch-5548.txt

Patch fixing -ve numbers in cluster summary, and adding synchronization for JobTracker methods
in RecoveryManager.

-ve numbers are reproducible on cluster by running MRReliability test 95% of the time. Patch
has been tested by running 4 runs of MRReliability on 100 node clusters. And we dont see -ve
numbers anymore.

test-patch result:
{noformat}
     [exec]
     [exec] -1 overall.
     [exec]
     [exec]     +1 @author.  The patch does not contain any @author tags.
     [exec]
     [exec]     -1 tests included.  The patch doesn't appear to include any new or modified
tests.
     [exec]                         Please justify why no tests are needed for this patch.
     [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 Eclipse classpath. The patch retains Eclipse classpath integrity.
     [exec]
     [exec]     +1 release audit.  The applied patch does not increase the total number of
release audit warnings.
     [exec]
{noformat}
It is difficult to write unit-test for this.

> Observed negative running maps on the job tracker
> -------------------------------------------------
>
>                 Key: HADOOP-5548
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5548
>             Project: Hadoop Core
>          Issue Type: Bug
>    Affects Versions: 0.20.0
>            Reporter: Owen O'Malley
>            Assignee: Amareshwari Sriramadasu
>            Priority: Blocker
>         Attachments: patch-5548.txt
>
>
> We saw in both the web/ui and cli tools:
> {noformat}
> Cluster Summary (Heap Size is 11.7 GB/13.37 GB)
> Maps  Reduces Total       Nodes  Map Task  Reduce Task  Avg.     Blacklisted 
>               Submissions        Capacity   Capacity   Tasks/Node Nodes
> -971  0       133         434     1736        1736      8.00        0
> {noformat}

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