I\'m working with WAS 7.0 and I found this error:
[27/10/13 11:55:06:727 CET] 00000023 servlet E com.ibm.ws.webcontainer.servlet.ServletWrapper run [Servle
I found the problem. Despite what it looks like, it is not a platform problem, I just forgot to initialize an ArrayList and hell broke loose. Hooray for such useful compiler '¬¬