Xiaoqiao He commented on HDFS-15238:

Thanks [~xuzq_zander] for your works. Good catch here.
+1 for [^HDFS-15238-002.patch] after fix the typo 'Cachec' as [~elgoiri] 
mentioned above. Thanks.

> RBF:NamenodeHeartbeatService caused memory to grow rapidly
> ----------------------------------------------------------
>                 Key: HDFS-15238
>                 URL: https://issues.apache.org/jira/browse/HDFS-15238
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: xuzq
>            Assignee: xuzq
>            Priority: Major
>         Attachments: HDFS-15238-002.patch, HDFS-15238-trunk-001.patch
> NamenodeHeartbeatService will get NameNode's HA status every 5s, and created 
> HAServiceProtocol every time.
> When creating HAServiceProtocol, it also will new Configuration.
> Over time, there will be more and more entries for REGISTER in Configuration 
> until fullGc happen. 
> The entry will piles up again, after reaching a certain threshold,  the 
> fullGc is triggered again.

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