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Posted to common-issues@hadoop.apache.org by "Junping Du (JIRA)" <ji...@apache.org> on 2016/08/01 20:58:20 UTC
[jira] [Commented] (HADOOP-13362) DefaultMetricsSystem leaks the
source name when a source unregisters
[ https://issues.apache.org/jira/browse/HADOOP-13362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15402805#comment-15402805 ]
Junping Du commented on HADOOP-13362:
-------------------------------------
Hi [~jlowe], forget to ask, any reason to not putting this patch to 2.7.3?
> 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: Critical
> 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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