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From "Tao Yang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-8774) Memory leak when CapacityScheduler allocates from reserved container with non-default label
Date Sat, 22 Sep 2018 00:13:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-8774?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tao Yang updated YARN-8774:
---------------------------
    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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