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Andrew Purtell commented on HBASE-9393: --------------------------------------- [~esteban] [~ashish singhi] What are you thinking still needs doing? I have this applied on top of 1.3.1 pending deployment to our production later this year. We run on a HDFS that supports CanUnbuffer. If you're looking for someone to take it over I could do that, since we will be trying it out in earnest. > 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.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.v1.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 (v6.3.15#6346)