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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-964) Inaccurate values in jobSummary logs
Date Fri, 25 Sep 2009 07:22:16 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12759417#action_12759417

Hemanth Yamijala commented on MAPREDUCE-964:

bq. Also of course, we must always set a start time before starting a task...

This happens.

bq. Sounds like things are very messy. Can we refactor the code to make this much simpler
/ obvious and make it more likely to be correctly maintained?

Yes, things are messy. I would not attempt refactor in this patch. Times not being set is
not the only thing that's messy. The whole status update logic needs a relook. There are duplicate
data structures and states and phases meaning different things in different contexts floating
all around.

bq. I'd call no end time a serious ERROR. Not an INFO level issue. I'd be tempted to assert...
Although this might not be best to do while trying to stabilize the code. Maybe in the mainline


> Inaccurate values in jobSummary logs
> ------------------------------------
>                 Key: MAPREDUCE-964
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-964
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 0.20.1
>            Reporter: Rajiv Chittajallu
>            Assignee: Sreekanth Ramakrishnan
>            Priority: Critical
>         Attachments: mapreduce-964-1.patch
> For some jobs the mapSlotSeconds is incorrect.
> negative value
> 09/09/01 18:31:44 INFOmapred.JobInProgress$JobSummary: jobId=job_200908270718_4568,submitTime=1251823543976,launchTime=1251823554310,finishTime=1251829904565,
> or too high
> 09/09/02 23:59:57 INFO mapred.JobInProgress$JobSummary: jobId=job_200908270718_5861,submitTime=1251935672924,launchTime=1251935687698,finishTime=1251935997949,
> mapSlotSeconds=1251949742,reduceSlotsSeconds=537,clusterMapCapacity=11262,clusterReduceCapacity=3754

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