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https://issues.apache.org/jira/browse/MAPREDUCE-2788?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ahmed Radwan updated MAPREDUCE-2788:
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Attachment: MAPREDUCE-2788_rev4.patch
The attached new patch pulls out requests' normalization methods to
SchedulerUtils, and both FS and CS now use them. FS.allocate() already calls
normalizeRequests(), but the previous implementation for normalizeRequest() in
FS doesn't rectify the case where memory==0. This is now fixed. Please let me
know if you have further comments.
> Normalize requests in FifoScheduler.allocate to prevent NPEs later
> ------------------------------------------------------------------
>
> Key: MAPREDUCE-2788
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2788
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Reporter: Ahmed Radwan
> Assignee: Ahmed Radwan
> Attachments: MAPREDUCE-2788.patch, MAPREDUCE-2788_rev2.patch,
> MAPREDUCE-2788_rev3.patch, MAPREDUCE-2788_rev4.patch
>
>
> The assignContainer() method in
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue
> can cause the scheduler to crash if the ResourseRequest capability memory ==
> 0 (divide by zero).
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