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https://issues.apache.org/jira/browse/HADOOP-5641?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hemanth Yamijala updated HADOOP-5641:
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Attachment: HADOOP-5641.patch
This patch fixes the NPE by implementing the proposal described in comments
above. It checks for Null in the lookup for the job in MemoryMatcher, and
returns nothing to the TT when such a state is determined. It also includes a
test case for simulating this condition.
Both the unit test and manual tests were run with and without the patch to make
sure the fix works.
> Possible NPE in CapacityScheduler's MemoryMatcher
> -------------------------------------------------
>
> Key: HADOOP-5641
> URL: https://issues.apache.org/jira/browse/HADOOP-5641
> Project: Hadoop Core
> Issue Type: Bug
> Reporter: Vinod K V
> Assignee: rahul k singh
> Attachments: HADOOP-5641.patch
>
>
> MemoryMatches does a job lookup based on a JobID in its
> getMemReservedForTasks(TaskTrackerStatus taskTracker) method. By this time,
> job might have been removed from JT's memory resulting in a NPE.
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