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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6541) Add JVM_OPTS="$JVM_OPTS -XX:+CMSClassUnloadingEnabled" to cassandra-env.sh
Date Fri, 03 Jan 2014 16:05:01 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13861622#comment-13861622
] 

Jonathan Ellis commented on CASSANDRA-6541:
-------------------------------------------

[~nickmbailey] did you ever file an openjdk bug, or are we convinced this is the new Working
As Designed?

> 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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