[jira] [Commented] (HBASE-4101) Regionserver Deadlock

["stack (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-4101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13065575#comment-13065575 ] 

stack commented on HBASE-4101:
------------------------------

>From up on list:

{code}
We aren't profiling right now.  Here's what is in the hbase-env.sh

export TZ="US/Mountain"
export HBASE_OPTS="$HBASE_OPTS -XX:+UseConcMarkSweepGC
-XX:+CMSIncrementalMode -verbose:gc -XX:+PrintGCDetails
-XX:+PrintGCTimeStamps -Xloggc:/home/hadoop/gc-hbase.log "
export HBASE_MANAGES_ZK=false
export HBASE_PID_DIR=/home/hadoop
export HBASE_HEAPSIZE=10240

Java is
java version "1.6.0_17"
Java(TM) SE Runtime Environment (build 1.6.0_17-b04)
Java HotSpot(TM) 64-Bit Server VM (build 14.3-b01, mixed mode)

We were planning an upgrade to 1.6.0_25 before we ran into this issue.
{code}

> Regionserver Deadlock
> ---------------------
>
>                 Key: HBASE-4101
>                 URL: https://issues.apache.org/jira/browse/HBASE-4101
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.90.3
>         Environment: CentOS 5.5, CDH3 u0 Hadoop, HBase 0.90.3
>            Reporter: Matt Davies
>             Fix For: 0.90.4
>
>         Attachments: jstack.txt
>
>
> We periodically see a situation where the regionserver process exists in the process list, zookeeper thread sends the keepalive so the master won't remove it from the active list, yet the regionserver will not serve data.
> Hadoop(cdh3u0), HBase 0.90.3 (Apache version), under load from an internal testing tool.
> Attached is the full JStack

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