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Posted to yarn-issues@hadoop.apache.org by "Tao Yang (JIRA)" <ji...@apache.org> on 2018/09/14 13:45:00 UTC
[jira] [Commented] (YARN-8774) Memory leak when CapacityScheduler
allocates from reserved container with non-default label
[ https://issues.apache.org/jira/browse/YARN-8774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16614866#comment-16614866 ]
Tao Yang commented on YARN-8774:
--------------------------------
Attached v1 patch for review.
> Memory leak when CapacityScheduler allocates from reserved container with non-default label
> -------------------------------------------------------------------------------------------
>
> Key: YARN-8774
> URL: https://issues.apache.org/jira/browse/YARN-8774
> Project: Hadoop YARN
> Issue Type: Bug
> Components: capacityscheduler
> Reporter: Tao Yang
> Assignee: Tao Yang
> Priority: Critical
> Attachments: YARN-8774.001.patch
>
>
> The cause is that the RMContainerImpl instance of reserved container lost its node label expression, when scheduler reserves containers for non-default node-label requests, it will be wrongly added into LeafQueue#ignorePartitionExclusivityRMContainers and never be removed.
> To reproduce this memory leak:
> (1) create reserved container
> RegularContainerAllocator#doAllocation: create RMContainerImpl instanceA (nodeLabelExpression="")
> LeafQueue#allocateResource: RMContainerImpl instanceA is put into LeafQueue#ignorePartitionExclusivityRMContainers
> (2) allocate from reserved container
> RegularContainerAllocator#doAllocation: create RMContainerImpl instanceB (nodeLabelExpression="test-label")
> (3) From now on, RMContainerImpl instanceA will be left in memory (be kept in LeafQueue#ignorePartitionExclusivityRMContainers) forever until RM restarted
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