java.lang.RuntimeException: java.lang.OutOfMemoryError: PermGen space
Hi All ..we are running with the following configuration.
Solaris Version 5.10
./prtconf
System Configuration: Sun Microsystems sun4v
Memory size: 8184 Megabytes
App Server Version,
Sun Java System Application Server Enterprise Edition 8.1_02 (build b11-fcs)
JVM Options in domain.xml,
<jvm-options>-Xmx512m</jvm-options>
but what Im facing is..say once in two days..when I open my application in the browser it shows..
Server Error
This server has encountered an internal error which prevents it from fulfilling your request. The most likely cause is a misconfiguration. Please ask the administrator to look for messages in the server's error log.
and in my server.log it shows..,
WARNING|sun-appserver-ee8.1_02|javax.enterprise.system.container.web|_ThreadID= 17;|WEB3061 : HttpService: Unhandled pipeline exception
java.lang.RuntimeException: java.lang.OutOfMemoryError: PermGen space
at com.sun.enterprise.web.connector.httpservice.HttpServiceProcessor.process(HttpS erviceProcessor.java:251)
at com.sun.enterprise.web.HttpServiceWebContainer.service(HttpServiceWebContainer. java:2071)
Caused by: java.lang.OutOfMemoryError: PermGen space
|#]
after getting this I used to reboot the machine..then It ll be fine for some time.,this happens repeatedly..
and some of the documents says..we need to increase the Xmx..
if it so.,how much I can incerase..we are running sun x-fire t2000
Thanks in Advance,
Ashik
[1569 byte] By [
ashik_s] at [2007-11-14]
Rebooting the machine is unnecessary; you can just stop and restart the application server.
The PermGen holds Class objects primarily (also interned strings and a few other things); are you doing a lot of deployment/redeployment? Those operations greatly increase the number of classes in use by the app server (because each new deployment is a new set of classes from the app server perspective), and that's the most common cause of this problem. In that case, the only thing to do is increase the PermGen size by including in your jvm-options -XX:MaxPermSize=<something>; I'd try 128m or 256m.
More recent versions of the app server (especially platform edition 9.0) have better handling of the multiple classes involved, so you might want to check them out.
A good reference on GC is http://java.sun.com/docs/hotspot/gc5.0/gc_tuning_5.html
-Scott
sdo at 2007-7-7 >
Permgen memory is the memory space used to store permanent objects. The objects that the JVM belives will be necessary throughout the life of the application. Like classes themselves and stuff.
Check this : http://www.thesorensens.org/?p=14
and this : http://wiki.caucho.com/Java.lang.OutOfMemoryError:_PermGen_space
Also, give it a read at this : http://forums.oracle.com/forums/message.jspa?messageID=1268268Although this thread is not with a problem exactly like yours, it should give you some pointers as to what might be happening.
Rp
Hi..many thanks.
I added an entry in my domain.xml as ,hope this be correct :)
<jvm-options>-XX:MaxPermSize=256m</jvm-options>
and increased.,the following from 512 from 1024
<jvm-options>-Xmx1024m</jvm-options>
whether this be enough? ,if I struck ,anywhere again I will get back you.
Ashik
