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From "Jeremiah Jordan (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-6541) Add JVM_OPTS="$JVM_OPTS -XX:+CMSClassUnloadingEnabled" to
Date Thu, 09 Jan 2014 15:56:54 GMT


Jeremiah Jordan commented on CASSANDRA-6541:

Yeah, I was adding 1.6 versions where we've seen it, since we can't know when they put that
into 1.6.

> Add JVM_OPTS="$JVM_OPTS -XX:+CMSClassUnloadingEnabled" to
> --------------------------------------------------------------------------
>                 Key: CASSANDRA-6541
>                 URL:
>             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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