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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3953) Gridmix throws NPE and does not simulate a job if the trace contains null taskStatus for a task
Date Fri, 16 Mar 2012 08:39:44 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13230973#comment-13230973

Hadoop QA commented on MAPREDUCE-3953:

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

    +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 patch.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2065//console

This message is automatically generated.
> Gridmix throws NPE and does not simulate a job if the trace contains null taskStatus
for a task
> -----------------------------------------------------------------------------------------------
>                 Key: MAPREDUCE-3953
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3953
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Ravi Gummadi
>            Assignee: Ravi Gummadi
>         Attachments: 3953.v1.patch
> In a trace file, if a succeeded job contains a failed task, then that task's taskStatus
will be null. This is causing NPE in Gridmix and then Gridmix is ignoring/not-considering
such jobs for simulation. The job could succeed even with failed tasks if the job submitter
in original cluster configured that job to tolerate failures using mapreduce.map.failures.maxpercent
and mapreduce.reduce.failures.maxpercent.

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