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huaxiang sun edited comment on HBASE-19320 at 11/22/17 12:52 AM: ----------------------------------------------------------------- Attach two screenshots for this issue. The first one is query DirectByteBuffer whose capacity > 4M. The second one is the gc root path to illustrate who holds this DM. I checked all of these objects, they are have the same gc root path. Adding these objects' capacity together, it is more than 2GB. was (Author: huaxiang): Attach two screenshots for this issue. The first one is query DirectByteBuffer whose capacity > 5M. The second one is the gc root path to illustrate who holds this DM. I checked all of these objects, they are have the same gc root path. Adding these objects' capacity together, it is more than 2GB. > 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 > Attachments: 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. -- This message was sent by Atlassian JIRA (v6.4.14#64029)