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https://issues.apache.org/jira/browse/CASSANDRA-6541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13861662#comment-13861662
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Jason Brown commented on CASSANDRA-6541:
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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).
> 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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