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https://issues.apache.org/jira/browse/MAPREDUCE-4013?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bhallamudi Venkata Siva Kamesh updated MAPREDUCE-4013:
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Attachment: MAPREDUCE-4013.patch
Shuffle phase hangs,as long as *remainingMaps > 0*. We are decrementing the
count of *remainingMaps* only when the copy phase is sucessful.But for the
failedmaps, we are not decrementing *remainingMaps* count. We should decrement
it. Attaching the patch for the same.
Tested the patch by setting *mapreduce.map.failures.maxpercent* value as 2. Ran
a job having 104 map tasks and failed 2 map tasks. Job is till passing.
Please look into the patch and provide your comments.
> Reduce task gets stuck when a M/R job is configured to tolerate failures
> ------------------------------------------------------------------------
>
> Key: MAPREDUCE-4013
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4013
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.2
> Reporter: Amar Kamat
> Priority: Blocker
> Labels: shuffle
> Fix For: 0.24.0
>
> Attachments: MAPREDUCE-4013.patch
>
>
> When a M/R job is configured to run with some tolerance to task failures (via
> mapreduce.map.failures.maxpercent), then the reduce task of that job gets
> stuck in the shuffle phase.
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