I think you'll find the server has already stopped before
the resizer runs. The resizer is just a background task
that does garbage collection of pools.
1) There is a known problem with the JVM on linux
(possibly only in some versions of the 2.4 kernel) with
thread control. (There is a long discussion in the EJB
forum from last week). It seems to be part fixed in
2) I've seen it reported that running from the Windows
shell blocks the server (it goes to sleep) but then
you wouldn't see the resizer message. I've never seen
this on XP.
3) It could be a blocking problem with your application
What versions do you have (jboss/jvm/os)?