Server Hanging

[Eliminator]

My Tekkit Lite Server hangs as soon as it start with the message:

[Minecraft] Can't keep up! Did the system time change, or is the server overloaded?

And the server terminal is completely unresponsive.

I still have plenty of memory and CPU freed up so that is not he problem.

Is a mod causing this?

[Eliminator]

The exact error is:

2013-04-01 21:32:33 [sEVERE] [ForgeModLoader] Detected leaking worlds in memory. There are 4 worlds that appear to be persisting. A mod is likely caching the world incorrectly

 

2013-04-01 21:32:33 [sEVERE] [ForgeModLoader] The world 6ce2546f (world) has leaked.



2013-04-01 21:32:33 [sEVERE] [ForgeModLoader] The world 530eb6a4 (world) has leaked.

[Jebussz]

hmm. how is your launching file modified? ( the .bat file ) If you modified it incorrectly that may have the terminal become unresponsive. This error your seeing is because of dimmensional doors. when the server first starts as of 6.1 it loads the limbo dimension along with all the others. As it unloads the limbo dimension ( as with the end dimension for some reason ) it comes up with the error. Idk how this error impacts the server as mine seems fine after it comes up.

[Eliminator]

I removed dimensional doors and my server has this error now:

2013-04-03 13:00:39 [WARNING] [Minecraft] Can't keep up! Did the system time change, or is the server overloaded?

2013-04-03 13:01:06 [iNFO] [ForgeModLoader] Unloading dimension 1

2013-04-03 13:01:07 [sEVERE] [ForgeModLoader] Detected leaking worlds in memory. There are 2 worlds that appear to be persisting. A mod is likely caching the world incorrectly

 

2013-04-03 13:01:07 [sEVERE] [ForgeModLoader] The world 6aa2f4d8 (world) has leaked.

Also if any of my users travel too fast (telaporting or super fast power armour) the chunks don't load and the server hangs.

[Teraku]

Sounds like the PC running the server either isn't powerful enough, or the server isn't getting enough RAM.

[Eliminator]

I allocated it 6 GB of ram for it and it only uses 2.2 GB when it crashes.

Also my quad core CPU is never pined.

[Eliminator]

Here is another error my server had:

2013-04-03 15:30:53 [sEVERE] [ForgeModLoader] The ForgeModLoader state engine has become corrupted. Probably, a state was missed by and invalid modification to a base classForgeModLoader depends on. This is a critical error and not recoverable. Investigate any modifications to base classes outside ofForgeModLoader, especially Optifine, to see if there are fixes available.

2013-04-03 15:30:53 [iNFO] [sTDERR] Exception in thread "Server thread" java.lang.RuntimeException: The ForgeModLoader state engine is invalid