java/lang/OutOfMemoryError - what do I do about it?
Is there any advice available for what to do when you start getting problems with memory ? I’ve got a Jazz Team Server and CLM applications v6.0.6 running on a Windows Server 2012 Standard with MS SQL Server 2016 (SP2) databases. We are using the Liberty web-server. About two weeks ago we started having problems where users could not log on. If I rebooted the server everything was OK for a couple of days. Then the problem returned. I looked in the <install-dir>\server\logs\messages_<date>.log” file and there are “java.lang.OutOfMemory” exceptions. We are also getting some entries in the Windows Application Log from source=IBM Java mentioning this OutOfMemory Error. And I have core dump files and “javacore.txt” in the <install-dir>\server\liberty\server\clm” folder. I don’t really want to keep having to reboot the server every few days so what should my next move be ?
Thanks Peter |
2 answers
Ralph Schoon (62.7k●3●36●43)
| answered Nov 27 '19, 7:39 a.m.
FORUM ADMINISTRATOR / FORUM MODERATOR / JAZZ DEVELOPER Peter,
we have some information in the deployment Wiki: https://jazz.net/wiki/bin/view/Deployment/OomIntheLog
That was one example. There are more - you can search it.
You can only give the JVM memory that is available. There is no information about your node or your topology.
Given that, I would suggest to get in contact with support if your system is that unstable at the moment.
You should also consider monitoring your system https://jazz.net/wiki/bin/view/Deployment/DeploymentMonitoring to understand what happens and what changes.
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Eleven days ago I edited the "server.startup.bat" so that we now use -Xms8G and -Xmx8G (instead of the original 4G)
Since then the Jazz Team Server has been stable and there have been no OutOfMemory errors.
So I'm going to stick with these settings. |
Comments
Would increasing the Java Heap Size values in "server.startup.bat" be worth a try ?
i.e. set JAVA_OPTS=%JAVA_OPTS%-Xmx8G (instead of 4G)