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https://issues.apache.org/jira/browse/HBASE-16004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15325732#comment-15325732
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Jurriaan Mous commented on HBASE-16004:
---------------------------------------
Yes. See
https://github.com/apache/hbase/blob/master/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/AsyncRpcChannelImpl.java
and search direct to see where we create our direct BBs.
> Update to Netty 4.1.1
> ---------------------
>
> Key: HBASE-16004
> URL: https://issues.apache.org/jira/browse/HBASE-16004
> Project: HBase
> Issue Type: Improvement
> Reporter: Jurriaan Mous
> Assignee: Jurriaan Mous
> Fix For: 2.0.0
>
> Attachments: HBASE-16004.patch
>
>
> Netty 4.1 is out and received first bug fix release so it seems good enough
> for hbase to migrate.
> It seems to have great performance improvements in Cassandra because of
> optimizations in cleaning direct buffers. (Now is on by default)
> https://issues.apache.org/jira/plugins/servlet/mobile#issue/CASSANDRA-11818/comment/15306030
> https://github.com/netty/netty/pull/5314
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