Todd Lipcon created HDFS-4182:
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Summary: 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: 2.0.2-alpha, 0.23.4, 3.0.0
Reporter: Todd Lipcon
Priority: Critical
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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