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https://issues.apache.org/jira/browse/HDFS-4182?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Joseph Evans updated HDFS-4182:
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Resolution: Fixed
Fix Version/s: 0.23.5
2.0.3-alpha
3.0.0
Status: Resolved (was: Patch Available)
I put this into trunk, branch-2, and branch-0.23
> SecondaryNameNode leaks NameCache entries
> -----------------------------------------
>
> Key: HDFS-4182
> URL: https://issues.apache.org/jira/browse/HDFS-4182
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.23.4, 3.0.0, 2.0.2-alpha
> Reporter: Todd Lipcon
> Assignee: Robert Joseph Evans
> Priority: Critical
> Fix For: 3.0.0, 2.0.3-alpha, 0.23.5
>
> Attachments: HDFS-4182-branch-0.23.txt, HDFS-4182.txt, HDFS-4182.txt,
> HDFS-4182.txt, HDFS-4182.txt
>
>
> We recently saw an issue where a 2NN ran out of memory, even though it had a
> relatively small fsimage. When we looked at the heap dump, we saw that all of
> the memory had gone to entries in the NameCache.
> It appears that the NameCache is staying in "initializing" mode forever, and
> therefore a long running 2NN leaks entries.
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