Robbie Strickland created CASSANDRA-9938:
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Summary: Significant GC pauses
Key: CASSANDRA-9938
URL: https://issues.apache.org/jira/browse/CASSANDRA-9938
Project: Cassandra
Issue Type: Bug
Components: Core
Environment: Ubuntu 14.04, Java 1.8.0u45
Reporter: Robbie Strickland
Attachments: gc_log.txt
We have an 18-node analytics cluster, running 2.1.7 patched with
CASSANDRA-9662. On a couple of the nodes we are seeing very long GC pauses,
especially in old gen. Eventually these nodes OOM:
{code}
ERROR [SharedPool-Worker-167] 2015-07-30 00:36:20,746
JVMStabilityInspector.java:94 - JVM state determined to be unstable. Exiting
forcefully due to: java.lang.OutOfMemoryError: Java heap space
{code}
We use G1 with the following settings:
Max heap = 16G
New size = 1.6G
+UseTLAB
+ResizeTLAB
+PerfDisableSharedMem
-UseBiasedLocking
The nodes in question have average load profiles for the cluster, and caches
are disabled on all tables. There is no obvious difference with the
problematic nodes. Unfortunately we're currently getting an assertion error
when trying to get a heap dump, or I would post that.
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