Let's start off by stating that I'm not a WAS expert.
I'm currently busy installing ES2 on a WAS / Windows 2003 machine which connects to an Oracle 10g DB. I've following the installation instructions quite carefully, but I ran into a brick wall that I can't seem to move myself. Hopefully someone over here can help me out.
Over many attempts I've had various different issues while running the configuration manager. Most of these issues pop up after the ear files are configured and are ready to be deployed. Reviewing the log files I noticed that the I get a java.lang.OutOfMemoryError at the times when the issues pop up. The server itself doesn't have a shortage of RAM (16GB) and I did increase the deployer heap size as described in the manual.
Eventually I've now given up searching and decided to throw myself at the mercy of the forums for some help 
. Since I don't really even know where to begin investigating the issue (besides confirming that I followed the steps in the manual), I'd be appreciative of almost any suggestions.
Thanks
Greg