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https://issues.apache.org/jira/browse/HBASE-9393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Busbey updated HBASE-9393:
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Summary: Region Server fails to properly close socket resulting in many
CLOSE_WAIT to Data Nodes (was: Hbase does not closing a closed socket
resulting in many CLOSE_WAIT )
> Region Server fails to properly close socket resulting in many CLOSE_WAIT to
> Data Nodes
> ---------------------------------------------------------------------------------------
>
> Key: HBASE-9393
> URL: https://issues.apache.org/jira/browse/HBASE-9393
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.94.2, 0.98.0, 1.0.1.1, 1.1.2
> Environment: Centos 6.4 - 7 regionservers/datanodes, 8 TB per node,
> 7279 regions
> Reporter: Avi Zrachya
> Assignee: Ashish Singhi
> Priority: Critical
> Fix For: 1.4.0, 1.3.2, 1.1.12, 2.0.0, 1.2.7
>
> Attachments: HBASE-9393-branch-1.patch, HBASE-9393.patch,
> HBASE-9393.v1.patch, HBASE-9393.v10.patch, HBASE-9393.v11.patch,
> HBASE-9393.v12.patch, HBASE-9393.v13.patch, HBASE-9393.v14.patch,
> HBASE-9393.v15.patch, HBASE-9393.v15.patch, HBASE-9393.v16.patch,
> HBASE-9393.v16.patch, HBASE-9393.v17.patch, HBASE-9393.v18.patch,
> HBASE-9393.v2.patch, HBASE-9393.v3.patch, HBASE-9393.v4.patch,
> HBASE-9393.v5.patch, HBASE-9393.v5.patch, HBASE-9393.v5.patch,
> HBASE-9393.v6.patch, HBASE-9393.v6.patch, HBASE-9393.v6.patch,
> HBASE-9393.v7.patch, HBASE-9393.v8.patch, HBASE-9393.v9.patch
>
>
> HBase dose not close a dead connection with the datanode.
> This resulting in over 60K CLOSE_WAIT and at some point HBase can not connect
> to the datanode because too many mapped sockets from one host to another on
> the same port.
> The example below is with low CLOSE_WAIT count because we had to restart
> hbase to solve the porblem, later in time it will incease to 60-100K sockets
> on CLOSE_WAIT
> [root@hd2-region3 ~]# netstat -nap |grep CLOSE_WAIT |grep 21592 |wc -l
> 13156
> [root@hd2-region3 ~]# ps -ef |grep 21592
> root 17255 17219 0 12:26 pts/0 00:00:00 grep 21592
> hbase 21592 1 17 Aug29 ? 03:29:06
> /usr/java/jdk1.6.0_26/bin/java -XX:OnOutOfMemoryError=kill -9 %p -Xmx8000m
> -ea -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode
> -Dhbase.log.dir=/var/log/hbase
> -Dhbase.log.file=hbase-hbase-regionserver-hd2-region3.swnet.corp.log ...
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