Our app is kind of complex, because it talks to many other applications using JMS and dumps data on queues! Rest of it is pretty straight forward.
But - here is what happened
- We got Java VM hanging with thread core dump
- We got duplicate class error when there was duplicate class
- We could talk to MQSeries
- We got database problems
Here is what we did - we searched google, it helped alot, but crux of the whole issue is that you can not even think that there can be duplicate class error because of a bug in Websphere - and on top of that, you have to give permissions for queue manager even if you have security turned off.
Basically - we had to patch websphere + java again and again to resolve these issues.
I am frustated!