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  1. Cassandra
  2. CASSANDRA-6541

New versions of Hotspot create new Class objects on every JMX connection causing the heap to fill up with them if CMSClassUnloadingEnabled isn't set.

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      Newer versions of Oracle's Hotspot JVM , post 6u43 (maybe earlier) and 7u25 (maybe earlier), 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. Adding:

      JVM_OPTS="$JVM_OPTS -XX:+CMSClassUnloadingEnabled"

      The the options in cassandra-env.sh alleviates the problem.

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            brandon.williams Brandon Williams Assign to me
            jlacefie jonathan lacefield
            Brandon Williams
            Michael Shuler
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