Finding an infinite loop?

[flarosa]

Hi,

I have a web application running on JBoss. Every few hours I find that
the CPU meter of my machine is pegged near 100% and things are running
very slowly, although the application is still active and able to
serve requests.

I suspect that some request or circumstance is causing the server to
go into an infinite loop, but I don't know how to reproduce it on a
test machine.

Is there a way to query the JVM once it is in this state and try to
figure out what code is running?

Thanks,
Frank

 

[a24900]

Is there a way to query the JVM once it is in this state and try to
figure out what code is running?

Generate a thread dump. If supported on your platform generate a stack
trace, too.

 

[Adam Maass]

Hi,

I have a web application running on JBoss. Every few hours I find that
the CPU meter of my machine is pegged near 100% and things are running
very slowly, although the application is still active and able to
serve requests.

I suspect that some request or circumstance is causing the server to
go into an infinite loop, but I don't know how to reproduce it on a
test machine.

Is there a way to query the JVM once it is in this state and try to
figure out what code is running?

My first instinct is garbage collection.

-- Adam Maass