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Posted to commits@cassandra.apache.org by "Jason Brown (JIRA)" <ji...@apache.org> on 2014/01/03 17:53:52 UTC

[jira] [Comment Edited] (CASSANDRA-6541) Add JVM_OPTS="$JVM_OPTS -XX:+CMSClassUnloadingEnabled" to cassandra-env.sh

    [ https://issues.apache.org/jira/browse/CASSANDRA-6541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13861662#comment-13861662 ] 

Jason Brown edited comment on CASSANDRA-6541 at 1/3/14 4:53 PM:
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Yeah, a brute force check of some clusters confirms some are on 1.6.0_41, _37, and _45 - and, of course, they are mixed within the cluster, depending on when the instance was launched (if it was with an older AMI with older JVM).

I haven't narrowed the problem down to which instances had troubles with which JVM, but some clusters with < u45 did not have any problems, so I suspect it's at least > u41 (our most highest version), but probably [~benedict] is correct with u45.


was (Author: jasobrown):
Yeah, a brute force check of some clusters confirms some are on 1.6.0_41, _37, and _45 - and, of course, they are mixed within the cluster, depending on when the instance was launched (if it was with an older AMI with older JVM).

> Add JVM_OPTS="$JVM_OPTS -XX:+CMSClassUnloadingEnabled" to cassandra-env.sh
> --------------------------------------------------------------------------
>
>                 Key: CASSANDRA-6541
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6541
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Config
>            Reporter: jonathan lacefield
>            Priority: Minor
>
> Newer versions of Oracle's Hotspot JVM , post 6u45, are experiencing issues with GC and JMX where heap slowly fills up overtime until OOM or a full GC event occurs, specifically when CMS is leveraged.  Running repair exacerbates this issue.  The configuration added to the Summary line helps alleviate this behavior and should be included in the C* config files by default.



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