For some days our server has been experiencing hickups and some times even total stops as a result from 100% cpu usuage by java.

As i do not have that much experience myself i point myself here for help on where to start looking.

We upgraded recently from version 6.0.9 to Release 7.2.0_GA_2669 and run on UBUNTU8_64 UBUNTU8_64

I have no clue where to start looking so any help is appreciated and if you require any more info please do ask.