Infinite loop?

[Dieter.Bender@xxxxxxxxxxx (Dieter Bender)]

Hi,

we use WebSphere 3.5.6 running on as400 V5R1;
from time to time CPU usage reaches near 100% all used by one thread of the
application server. Nobody is working with the application and only PWRDWNSYS
*immed brings down WebSphere. It's impossible to end the server from the
WepSphere console, or to stop it in another way. Neither endjob, normal or
abnormal, nor endsbs kills WebsFear.
It looks like an infinite loop, maybe in the JIT compile. CRTJVAPGM to
clearify this is a little bit complicated, beacause we use JSPs and it is
running hours to days.
The problem doesn't occur running WebSphere on another box (NT).

any ideas?
--
mfG

Dieter Bender