You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hbase.apache.org by "Vladimir Rodionov (JIRA)" <ji...@apache.org> on 2016/06/14 21:44:30 UTC
[jira] [Commented] (HBASE-9393) Hbase does not closing a closed
socket resulting in many CLOSE_WAIT
[ https://issues.apache.org/jira/browse/HBASE-9393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15330678#comment-15330678 ]
Vladimir Rodionov commented on HBASE-9393:
------------------------------------------
We see this issue in one of our customer's installation. HBase 1.1.2 (hdfs - 2.5.1). One question:
If we have scr enabled (no socket access, direct reads), how it is possible to get into thousands of sockets in CLOSE_WAIT states in RS? I read all this thread but found no explanation, may be I missed something.
> Hbase does not closing a closed socket resulting in many CLOSE_WAIT
> --------------------------------------------------------------------
>
> 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: 2.0.0
>
> Attachments: 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.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 ...
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)