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https://issues.apache.org/jira/browse/HBASE-16635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15502428#comment-15502428
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Duo Zhang commented on HBASE-16635:
-----------------------------------

Ah we should override the close method, not disconnect, sorry...

> RpcClient under heavy load leaks some netty bytebuf
> ---------------------------------------------------
>
>                 Key: HBASE-16635
>                 URL: https://issues.apache.org/jira/browse/HBASE-16635
>             Project: HBase
>          Issue Type: Bug
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: HBASE-16635.patch
>
>
> Yet to analyse the actual root cause. 
> But the case is that when we run a PE tool with 50 threads under heavy load 
> when the writes are clogged I think we have some netty Bytebuf leak. Not sure 
> if it is a serious issue but we get this log
> {code}
> 2016-09-14 19:37:09,767 ERROR [Default-IPC-NioEventLoopGroup-1-16] 
> util.ResourceLeakDetector: LEAK: ByteBuf.release() was not called before it's 
> garbage-collected. Enable advanced leak reporting to find out where the leak 
> occurred. To enable advanced leak reporting, specify the JVM option 
> '-Dio.netty.leakDetection.level=advanced' or call 
> ResourceLeakDetector.setLevel() See 
> http://netty.io/wiki/reference-counted-objects.html for more information.
> {code}
> So reading the given link it is because of some ByteBuf that was not released 
> properly by the client and hence it gets GCed automatically. Netty provides 
> tips and tricks to find the root cause. Will get back here.



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