Satellite 5 performance: apparent deadlocks with Hibernate C3P0 pools (tomcat catalina, rhn search and taskomatic etc)
Issue
- "APPARENT DEADLOCK" warning messages are found in Satellite 5.6 or 5.7 logs such as /var/log/tomcat6/catalina.out log or /var/log/rhn/rhn_taskomatic_daemon.log:
INFO | jvm 1 | 2016/01/07 10:19:44 | Jan 7, 2016 10:19:44 AM com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector run
INFO | jvm 1 | 2016/01/07 10:19:44 | WARNING: com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@5c885c88 -- APPARENT DEADLOCK!!! Complete Status:
- If running external Oracle database the logs indicate processes are being killed:
Process q003 died, see its trace file
Thu Jan 7 10:19:44 2016
ksvcreate: Process(q003) creation failed
- possibly accompanied by high memory / cpu usage
Environment
- Red Hat Satellite 5.6
- Red Hat Satellite 5.7
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