Symptoms
OA UI is down or UI Java process constantly consumes 100% CPU.
/var/log/pa/pui/pui.log contains the entries:
2016-11-29 16:26:53,886 0b49b3d5a2 8373) DEBUG ERR java.lang.OutOfMemoryError: Java heap space
2016-11-29 16:26:53,894 8354) DEBUG ERR java.lang.OutOfMemoryError: Java heap
The following errors are logged to /var/log/pa/console.log
171011 10:54:45 INFO [stdout] (default task-114) Turbine: Double initializaton of Turbine was attempted!
java.lang.OutOfMemoryError: GC overhead limit exceeded
Dumping heap to /var/log/pa/java_pid2624.hprof ...
Heap dump file created [2910748866 bytes in 27.098 secs]
Cause
Various reasons may occupy the whole Java heap space of the UI service.
Resolution
As an immediate resolution, restart the service:
# service pau restart
For permanent resolution, contact Odin Technical Support to provide root cause analysis.
If the issue is repeatable and amount of RAM on the UI node allows, the memory limit can be increased:
Edit the Wildfly configuration file:
[root@ui ~]# grep Xmx /usr/local/pem/wildfly-10.1.0.Final/bin/standalone.conf JAVA_OPTS="-Xms64m -Xmx2048m -XX:MetaspaceSize=96M -XX:MaxMetaspaceSize=256m -Djava.net.preferIPv4Stack=true"and change it to:
[root@ui ~]# grep Xmx /usr/local/pem/wildfly-10.1.0.Final/bin/standalone.conf JAVA_OPTS="-Xms64m -Xmx4096m -XX:MetaspaceSize=96M -XX:MaxMetaspaceSize=256m -Djava.net.preferIPv4Stack=true"Restart the UI service:
# service pau restart