Phil Yang created CASSANDRA-8860:
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Summary: Too many java.util.HashMap$Entry objects in heap
Key: CASSANDRA-8860
URL: https://issues.apache.org/jira/browse/CASSANDRA-8860
Project: Cassandra
Issue Type: Bug
Environment: Cassandra 2.1.3, jdk 1.7u51
Reporter: Phil Yang
Attachments: cassandra-env.sh, cassandra.yaml, jmap.txt, jstack.txt
While I upgrading my cluster to 2.1.3, I find some nodes (not all) may have GC
issue after the node restarting successfully. Old gen grows very fast and most
of the space can not be recycled after setting its status to normal
immediately. The qps of both reading and writing are very low and there is no
heavy compaction.
Jmap result seems strange that there are too many java.util.HashMap$Entry
objects in heap, where in my experience the "[B" is usually the No1.
If I downgrade it to 2.1.1, this issue will not appear.
I uploaded conf files and jstack/jmap outputs. I'll upload heap dump if someone
need it.
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