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https://issues.apache.org/jira/browse/HDFS-14702?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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He Xiaoqiao updated HDFS-14702:
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Attachment: datanode.dump.png
> Datanode.ReplicaMap memory leak
> -------------------------------
>
> Key: HDFS-14702
> URL: https://issues.apache.org/jira/browse/HDFS-14702
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Affects Versions: 2.7.1
> Reporter: He Xiaoqiao
> Priority: Major
> Attachments: datanode.dump.png
>
>
> DataNode memory is occupied by ReplicaMaps and cause GC high frequency then
> write performance degrade.
> It is about 600K block replicas located at DataNode, but when dump heap,
> there are over 8M items of ReplicaMaps and footprint over 500MB. It seems
> that memory leak. One more situation, the block w/r ops is very high.
> Do not test HDFS-8859 and no idea if it can solve this issue.
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