Jboss is crashing and throwing Out of swap space error.

[dmouli]

Hi,

We have  deployed our product in jboss4.02  server in windows environment.

we are getting the following exception while hitting the server with 5 concurrent requests.

Exception in thread "CompilerThread0" java.lang.OutOfMemoryError: requested 1383

13736 bytes for Chunk::new. Out of swap space?

Press any key to continue . . .

It is working fine with single request and failing in multi user environment only.

We deployed the same jboss with our application in Linux  environment it is working fine and it is not crashing.

And also we deployed  the same application in WEB LOGIC  server in Windows environment , it is working fine with out any crashes for n number users.

Please help us to resolve the issue.

Thanks in advance

Mouli.D

[erasmomarciano]

Did you set anything on the JVM?

[dmouli]

Hi Thanks for ur response,

These are the jvm options we have given.

JAVA_OPTS: -server -Xmx768M -Dprogram.name=run.bat -Xms512m -Xmx1024m -Xss512k

Server machine conguration :-

4 GB ram,Windows 2003 server,Xeon dual CPU.

[peterj]

The OOME exception you are seeing could be caused by one of two things :

a) The JVM is attempting ot expand the heap and Windows says it has no more memory available

b) The JVM is attempting to spawn a new thread and Windows says it can't due to memory limitations

Are you by any chance booting the Windows system with the /3G option? This can often lead to situation 'b' above.

How large is your page file? What is your memory usage like, particularly committed memory?

Are you ruinng a 32-bit or 64-bit OS?

Try running with -Xms and -Xmx set to the same value (that is recommended for production anyway).

[dmouli]

Hi Peter Johnson,

Thank u  for your response.

1.We tried with -Xms and -Xmx set to the same value then also same problem.

2.We tried both 32, 64 bit systems then also same problem.

3.We increased virtual memory also, no use.

4.We have'nt used /3G option. (we are not aware of this)

5. Same  jboss environment is working fine in LINUX environment, with out any crashes.

6.Same application is working fine in Web-Logic and Windows environment.(I think the problem with the combination of jboss and Windows, is it right??)

..

Thanks

Mouli.D

[peterj]

Looking a little more carefully at the error message I notice that it is the compiler thread that is throwing the OOME. What is the size or the perngen? You might try increasing its max size, say to 512MB: -XX:MaxPermGen=512M

Also, I juts now read an aarticle about a new sysinternals tool: vmmap. You might try using that and see if it provides and other clues.