Runaway org.jboss.Main process on AIX

[sevenfan]

Running JBoss 3.0.x on AIX and third party application on top. I started the process yesterday, and noticed this morning that the web front-end seemed very slow. Rather than restart the app, I did a little poking around, and found that the process associated with this class was using all CPU on the machine, but very little memory.
Noted in the jboss.log that things didn't appear too out of the ordinary, but ran across one message indicating that all threads were waiting.
Have passed this information to third party vendor, but was wondering if this is a known JBoss issue which we might require patching?
I am complete JBoss newbie, so any help is appreciated.
Thanks.

[jonlee]

Some people have found issues with the JVM causing JBoss to display these problems. I still don't have enough cases or information to determine the source of the problem. However, so far Linux with Sun JDK 1.4.0 and HP-UX with Sun JDK 1.4.1 have displayed the problem you describe.

So possibly experiment with the JVM. I'd be interested in the results. I assume the patch levels recommended by IBM are in place for the JVM you are using?

[sevenfan]

The JVM in use here is an IBM version. IBM version ca131-20030122a. Patches are supposedly current, and machine has only been up for about 2 months. I'm also suspicious that a runaway thread inside the app may either be out of control, or issueing repeated database connection/release requests to the pool manager. Lots of log messages.

[jonlee]

Do you get the same problem if the application is not loaded? That would test your suspicion. Do you have a small sample of the log messages as it might help folks understand the issue or they might recognise the problem.

[jonlee]

You mentioned the "all threads waiting" message. Is this the "lots of log messages"? Perhaps a snippet pertaining to this section might be useful in the analysis.