configuring JVM parameters

[satya sahu]

Hi,
After running my java application for around 10-12 hours i am getting the following error and finally the server stops.
Error: "java.lang.OutOfMemoryError: unable to create new native thread"
System configuration:
1. Java : j2sdk1.4.2_08
2. System configruation: Windows XP service pack 3, (2x3.0Ghz with 4 GB RAM)
3. I run my application as Java Services and the java services has the "-Xmx512m", no other JVM args settings.

Can somebody help me in knowing the cause of the problem and suggest me the best solution.

Regards,
Satya

[Sérgio Lopes]

You can run the JVM with -verbose:gc and -XX:+PrintGCDetails to see more details about memory usage an memory freeing. Of course you can increase Xmx and Xms but maybe you have some kind of memory leak on your application.

[William Brogden]

If your application creates lots of Threads, perhaps you are not allowing the JVM to dispose of them correctly by exiting the run method.

This happened to me once - I was creating Threads but not starting them properly.

Bill