Solved Strange FTB: Ultimate Server Crashes

[Captain Digital]

So I've been running a Feed the Beast: Ultimate server for a few weeks now and there's a crash that's been coming up recently and is annoying me. It doesn't create any crash log, it just shuts down the server for some reason.

It comes out of nowhere as well. Everything seems to be fine one moment and then it goes down.

Here is what the server log says when this happens: http://pastebin.com/eA1J6Naz

Update: There's also a 2nd crash that I've started to get recently that I'm getting sick of. If anybody can figure out the issue from this crash log, please help me out. http://pastebin.com/nGE3SNmb

Anyone have any ideas? Thanks in advance!

I'm using MCPC Plus Legacy Build 7 to run Bukkit Plugins, if that matters at all.
The most notable plugins are: Essentials, GriefPrevention, LogBlock, Multiverse, WorldEdit, and WorldGaurd.

Edit:
The crashes have been resolved thanks to Jawshee. Here's the solution:

at codechicken.xycraftcopy.core.world.WorldExtension.unloadChunk(WorldExtension.java:52) is a problem with XyCraft, which they don't seem to be caring about after many support requests, we simply removed the mod.

The other error is your perm gen running out, simply add this to your startup script: -XX:MaxPermSize=512M

Let me know if you need to know how to do that

 

[Captain Digital]

Updated the main post to include another issue I had. I thought it'd be better posted here instead of creating a new thread.

 

[Captain Digital]

Please, anybody?

 

[Jawshee]

at codechicken.xycraftcopy.core.world.WorldExtension.unloadChunk(WorldExtension.java:52) is a problem with XyCraft, which they don't seem to be caring about after many support requests, we simply removed the mod.

The other error is your perm gen running out, simply add this to your startup script: -XX:MaxPermSize=512M

Let me know if you need to know how to do that


Here is our start.bat script I made:

title "CraftAU FTB Server (Ultimate Pack)"
java -server -Dcom.sun.management.jmxremote -Xms8G -Xmx12G -Xmn1G -XX:NewRatio=2 -XX:CMSFullGCsBeforeCompaction=1 -XX:SoftRefLRUPolicyMSPerMB=4096 -XX:+CMSParallelRemarkEnabled -XX:+UseParNewGC -XX:+DisableExplicitGC -Xnoclassgc -oss4M -ss4M -XX:+UseFastAccessorMethods -XX:CMSInitiatingOccupancyFraction=90 -XX:+UseConcMarkSweepGC -XX:UseSSE=4 -XX:+UseCMSCompactAtFullCollection -XX:ParallelGCThreads=4 -XX:+AggressiveOpts -XX:+UseLargePages -XX:ReservedCodeCacheSize=1G -XX:MaxPermSize=512M -cp spigot.jar -jar spigot.jar
pause

 

[UnionCraft]

Try removing Xycraft Tanks from the world, it probably wont stop the crash but it might subdue it alot.

In regards to the PermGen error I would like to confirm with Jawshee, we added -XX:_PermSize=128M -XX:MaxPermSize=512M (no underscore) to our start up script and havent seen the PermGen error since.

 

[Captain Digital]

at codechicken.xycraftcopy.core.world.WorldExtension.unloadChunk(WorldExtension.java:52) is a problem with XyCraft, which they don't seem to be caring about after many support requests, we simply removed the mod.

The other error is your perm gen running out, simply add this to your startup script: -XX:MaxPermSize=512M

Let me know if you need to know how to do that

Sorry for the late response, but this solved it. Thanks for the help!