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https://issues.apache.org/jira/browse/HBASE-16635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15502654#comment-15502654
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Duo Zhang commented on HBASE-16635:
-----------------------------------
+1.
There are still some bad practices but not your fault. I will file other issues
to fix it.
Thanks.
> 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, HBASE-16635_1.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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