The other night I was in the server admin console, and I was closing a file, then putting in a new one and then opening it. In the process the admin console locked up. So I closed Internet Explorer (no judging, that's all that's on this server). I opened it up again and the console page responded with an error. During this time there was a java process running that was using 50% of the 2x quad core 2.8ghz xeon's in the machine. That Java process took about 10 minutes to run.
After java was done with whatever it was doing, I was able to open up the fm server admin console. The log file there said that the fmadmin app had crashed and the app took about a minute to restart.
For those wondering, it's a raid 10 setup, 2x quad core, 50 or so GB of ram, etc. At the time I think there was 1 other user on connecting to a different file (and this user would never connect to the file I was closing).
So it made me wonder if there was an ideal version of java that works great with fm server 14 and windows 2012 r2, Current version is 1.80_31 looks like java has a 1.80_60 available.