huaxiang sun commented on HBASE-19320:

thanks [~saint....@gmail.com] for review. It needs some manual work as the fix 
from JDK only applies to JDK8u102+, enable it by default sometimes may work 
(sometimes may not if jvm version is not right).

> document the mysterious direct memory leak in hbase 
> ----------------------------------------------------
>                 Key: HBASE-19320
>                 URL: https://issues.apache.org/jira/browse/HBASE-19320
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.0.0, 1.2.6
>            Reporter: huaxiang sun
>            Assignee: huaxiang sun
>            Priority: Major
>         Attachments: HBASE-19320-master-v001.patch, Screen Shot 2017-11-21 at 
> 4.43.36 PM.png, Screen Shot 2017-11-21 at 4.44.22 PM.png
> Recently we run into a direct memory leak case, which takes some time to 
> trace and debug. Internally discussed with our [~saint....@gmail.com], we 
> thought we had some findings and want to share with the community.
> Basically, it is the issue described in 
> http://www.evanjones.ca/java-bytebuffer-leak.html and it happened to one of 
> our hbase clusters.
> Create the jira first and will fill in more details later.

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