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https://issues.apache.org/jira/browse/HADOOP-13362?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Junping Du resolved HADOOP-13362.
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Resolution: Fixed
Target Version/s: 2.7.4 (was: 2.7.4, 2.8.1)
I forget we have a different patch - YARN-5190 for 2.8 and after. Resolve it.
> DefaultMetricsSystem leaks the source name when a source unregisters
> --------------------------------------------------------------------
>
> Key: HADOOP-13362
> URL: https://issues.apache.org/jira/browse/HADOOP-13362
> Project: Hadoop Common
> Issue Type: Bug
> Components: metrics
> Affects Versions: 2.7.2
> Reporter: Jason Lowe
> Assignee: Junping Du
> Priority: Blocker
> Fix For: 2.7.4
>
> Attachments: HADOOP-13362-branch-2.7.patch
>
>
> Ran across a nodemanager that was spending most of its time in GC. Upon
> examination of the heap most of the memory was going to the map of names in
> org.apache.hadoop.metrics2.lib.UniqueNames. In this case the map had almost
> 2 million entries. Looking at a few of the map showed entries like
> "ContainerResource_container_e01_1459548490386_8560138_01_002020",
> "ContainerResource_container_e01_1459548490386_2378745_01_000410", etc.
> Looks like the ContainerMetrics for each container will cause a unique name
> to be registered with UniqueNames and the name will never be unregistered.
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