Out of Memory Problem

[JagSwag2014]

Lately, on my custom modpack, I have been having trouble on the server I made with memory. I am confused because we have 8GB's of ram dedicated to the server and ram usage levels stay below 50%. When it runs out of memory, it stops the server. Right before it runs out of memory, CPU usage fluctuates going above 50% then back down below 10% constantly. Here is the server log for the most recent crash:

http://www.pastebucket.com/21657

This didn't happen until recently, and it happens sporadically. It tends to point to different mods, but when they are removed, it points at other mods instead. Before, it pointed it's finger at Artifice. I removed the mod, then it pointed at a different mod. Any idea why this is happening?

[Clawx207]

Getting any console spam? When ever ive had an error like this, its because of all the spam thats happening in the console.

[JagSwag2014]

No, it doesn't spam the console. It's very abrupt. Never shows any signs of it until the server actually closes from it, then it shows the paste I showed above.

I have been told to increase the permgen size through the launch.bat file. I have tried a couple of things but it doesn't seem to work.

[Clawx207]

From what i get from this, theres a problem with your craft bukkit version. Tell me, where did you get your craftbukkit.jar from?

[JagSwag2014]

Using MCPC+ from here: http://ci.md-5.net/job/MCPC-Plus-Legacy/?

Downloaded the latest successful artifact for 1.5.2. (mcpc-plus-1.5.2-R1.1-forge738-B646.jar)

[JagSwag2014]

Tried using an older build of MCPC+ (mcpc-plus-1.5.2-R1.1-forge738-B645.jar), but it still didn't fix the problem.

[disconsented]

Set a world limit using world border and render out the entire thing, it should be significantly

[JagSwag2014]

Still runs out of memory. The uptime, however, lasts slightly longer.

[JagSwag2014]

Nevermind...... Now it won't even last an hour before shutting down. Tried resetting the bukkit.yml file, nothing changed.