When running the jboss-all-config-tests I have been seeing OutOfMemoryErrors well into the tests, but -verbose:gc clearly shows that there is plenty of memory. The process views also show that the handle/thread count is fine. That pretty much only left the MaxPermSize as becoming full, and I was able to run the tests using:

JAVA_OPTS="-verbose:gc -XX:MaxPermSize=70m -Xmx128m"

This seems like an excessive amount of perm heap memory so I would like to look into this further. This does not happen when running JDK 1.4.2.