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From "Jonathan Gray (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2545) Unresponsive region server, potential deadlock
Date Fri, 14 May 2010 18:48:53 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12867628#action_12867628

Jonathan Gray commented on HBASE-2545:

@stack, this bug does not exist in trunk.  no need to change the code to match branch (and
the change u made isn't actually the same since recursive is never set to true).  that style
is how this bug has been introduced twice.

> Unresponsive region server, potential deadlock
> ----------------------------------------------
>                 Key: HBASE-2545
>                 URL: https://issues.apache.org/jira/browse/HBASE-2545
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.20.4
>         Environment: Ubuntu 8.04.4 LTS, Hadoop 0.20.2, Amazon EC2 x-large cluster
>            Reporter: Kris Jirapinyo
>            Assignee: Todd Lipcon
>            Priority: Blocker
>         Attachments: 2545-trunk.txt, hbase-2545.txt, hbase-2545.txt, hbase-2545.txt,
hbase-2545.txt, hbase-hadoop-regionserver-mi-prod-hbase05.ec2.biz360.com.out
> We have a 15-node (14RS+1Master) hbase cluster.  We just recently upgraded from 0.20.3
to 0.20.4.  This cluster does have colocated hadoop MR, but we mostly use another MR cluster
to hit it.  Upon start, the cluster runs the jobs fine for about an hour.  Afterwards, an
RS seems to have locked up.  Doing a get for a row in region being served by that region server
hangs (cannot even ctrl+c out of the hbase shell).  Attached is the thread dump.  Verified
in UI that the affect server runs on 0.20.4 and not 0.20.3.

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