It looks like weblogic client jar is creating some conflicts with glassfish. My application failed to deploy.
It doesn't sound new to me. Years ago, I tried a similar approach (let two different appserver talk each to other using EJBs) and after a while I gave up. Since my application servers were in LAN, and I did not need a lot of different services to be used by each other, I used webservices instead, and that approach worked.
It's a pity. EJBs are powerful and I like them a lot, but in my humble opinion when you're using them outside the appserver there are always troubles (lot of jars on the client side to be deployed, jar conflicts and others).
I'm sorry to not be able to advice you better, but I think you'd better try webservices to avoid such issues. No headaches :-)