Cannot launch JBoss 5.1 on OpenJDK7 PPC

[Jose Ferrer]

I have a dual G4 running 10.5.8 and I'm able to run JBoss 5.1 with the
Apple JDK.  However, I'd like to run JBoss 6.  I can't find a JDK6 for
PPC so I'm trying the JDK7 builds.  It doesn't make it all the way up.
 The errors all seem similar to other errors trying to build the JDK
from source I saw on the mailing list; I don't know how to add a link.
 I tried to build the JDK from source using the build-ppc32.sh script
and I get similar errors, mostly unhandled signal 10, though setting
the owner of an already owned mutex and failed: invariant happen
sometimes.  In addition, sometimes it just hangs; nothing at all going
on.  Given the other errors, I suspect it's a missed signal.  I don't
know what I can do to help, but I have a small collection of
hs_err_pid*.log files and I'm happy to try anything.