We are currently using a locally patches JacORB 2.2.4.

The 2.30.GA includes our patch and also has some other fixes as well.

From Francisco Reverbel:

Yes, that patch is in JacORB 2.3.0, which includes at least another
RMI-related fix as well. It would be good to upgrade. (Disclaimer: I have
never tested JacORB 2.3.0 with JBossAS. A full run of the iiop testsuite
is needed.)

Notice that JacORB 2.3.0 has a "new property interop.sun to fix RMI/IIOP
related interoperability issues". Perhaps this makes a difference with
respect to the iiop testcase that has been recently disabled on JDK1.5...

NOTE: This upgrade involves JBoss TS recovery