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https://issues.apache.org/jira/browse/MAPREDUCE-2788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13089647#comment-13089647
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Ahmed Radwan commented on MAPREDUCE-2788:
-----------------------------------------
Thanks Arun! The LeafQueue uses the CapacitySchedulerContext interface (CS is
an implementation), so other implementations can be added. We don't need to tie
the LeafQueue to the CS implementation. So I think the
LeafQueue.assignContainer() should check/ensure that the request has no zero
memory request before dividing by zero. In my last patch I added
normalizeRequest() to the interface so any other implementations are enforced
to implement this method (which takes care of this zero memory case). What do
you think?
> LeafQueue.assignContainer() can cause a crash if
> request.getCapability().getMemory() == 0
> -----------------------------------------------------------------------------------------
>
> 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
>
>
> 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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