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https://issues.apache.org/jira/browse/MAPREDUCE-964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12759413#action_12759413
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eric baldeschwieler commented on MAPREDUCE-964:
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Also of course, we must always set a start time before starting a task...
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?
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 though...
> 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$JobSummary:
> jobId=job_200908270718_4568,submitTime=1251823543976,launchTime=1251823554310,finishTime=1251829904565,
>
> numMaps=7965,numSlotsPerMap=1,numReduces=40,numSlotsPerReduce=1,user=wile,queue=runner,status=SUCCEEDED,
>
> mapSlotSeconds=-2503133523,reduceSlotsSeconds=186536,clusterMapCapacity=11262,clusterReduceCapacity=3754
> or too high
> 09/09/02 23:59:57 INFO mapred.JobInProgress$JobSummary:
> jobId=job_200908270718_5861,submitTime=1251935672924,launchTime=1251935687698,finishTime=1251935997949,
>
> numMaps=1026,numSlotsPerMap=1,numReduces=10,numSlotsPerReduce=1,user=dfsload,queue=gridops,status=SUCCEEDED,
>
> mapSlotSeconds=1251949742,reduceSlotsSeconds=537,clusterMapCapacity=11262,clusterReduceCapacity=3754
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