[jira] Commented: (HBASE-1988) OutOfMemoryError in RegionServer

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

    [ https://issues.apache.org/jira/browse/HBASE-1988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12780151#action_12780151 ] 

stack commented on HBASE-1988:
------------------------------

Hey Stefan: Whats the load characteristic?  Short scans?  Many of them concurrently?  Big cells?  Yeah, looks like hbase-1927 but must be something else.  You are closing your scanners when done?  Please do a thread dump on the RS.  Its supposed to go down on OOME.  I'd like to see whats keeping it up.  Also, the RS will dump its heap on OOME (by default we've that flag set on JVM).  Any chance of your putting that dump in a public place so I can pull it and take a look?  Thanks.

> OutOfMemoryError in RegionServer
> --------------------------------
>
>                 Key: HBASE-1988
>                 URL: https://issues.apache.org/jira/browse/HBASE-1988
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.20.2
>         Environment: Java 1.6.0_16 64bit on CentOS with 3000M max heap
>            Reporter: Stefan Will
>         Attachments: regionserver.log.gz
>
>
> RegionServers tend to die with an OutOfMemoryError under load. I expected this problem to go away with the fix for HBASE-1927 in 0.20.2 RC1, but it's still happening. Also, when this happens the cluster becomes unresponsive, even once the load on the machines has gone back down. Interestingly there are lots and lots of scanner lease expired messages right before the OOM.

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