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https://issues.apache.org/jira/browse/YARN-8774?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tao Yang updated YARN-8774:
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Attachment: YARN-8774.002.patch
> 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
> Affects Versions: 3.2.0, 2.8.5
> Reporter: Tao Yang
> Assignee: Tao Yang
> Priority: Critical
> Attachments: YARN-8774.001.patch, YARN-8774.002.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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