Crash Causing Error

Code:

2011-05-06 22:35:31 [SEVERE] java.lang.NullPointerException
2011-05-06 22:35:31 [SEVERE]  at net.minecraft.server.World.a(World.java:1896)
2011-05-06 22:35:31 [SEVERE]  at net.minecraft.server.TileEntityMobSpawner.a(TileEntityMobSpawner.java:19)
2011-05-06 22:35:31 [SEVERE]  at net.minecraft.server.TileEntityMobSpawner.g_(TileEntityMobSpawner.java:24)
2011-05-06 22:35:31 [SEVERE]  at net.minecraft.server.World.cleanUp(World.java:984)
2011-05-06 22:35:31 [SEVERE]  at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:367)
2011-05-06 22:35:31 [SEVERE]  at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:285)
2011-05-06 22:35:31 [SEVERE]  at net.minecraft.server.ThreadServerApplication.run(SourceFile:394)
2011-05-06 22:35:31 [SEVERE] Unexpected exception
java.lang.NullPointerException
 at net.minecraft.server.World.a(World.java:1896)
 at net.minecraft.server.TileEntityMobSpawner.a(TileEntityMobSpawner.java:19)
 at net.minecraft.server.TileEntityMobSpawner.g_(TileEntityMobSpawner.java:24)
 at net.minecraft.server.World.cleanUp(World.java:984)
 at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:367)
 at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:285)
 at net.minecraft.server.ThreadServerApplication.run(SourceFile:394)
2011-05-06 22:35:40 [INFO] Read timed out
2011-05-06 22:36:19 [INFO] Connection reset
2011-05-06 22:36:26 [INFO] Connection reset
2011-05-06 22:36:32 [INFO] Read timed out
2011-05-06 22:36:36 [INFO] Connection reset
2011-05-06 22:36:40 [INFO] Read timed out
2011-05-06 22:36:43 [INFO] Read timed out
2011-05-06 22:36:47 [INFO] Read timed out
2011-05-06 22:36:53 [INFO] Read timed out
2011-05-06 22:36:54 [INFO] Connection reset
2011-05-06 22:37:09 [INFO] Read timed out
2011-05-06 22:37:12 [INFO] Read timed out
2011-05-06 22:37:20 [INFO] Connection reset
2011-05-06 22:37:57 [INFO] Read timed out
2011-05-06 22:38:12 [INFO] Read timed out
2011-05-06 22:38:35 [INFO] Read timed out
2011-05-06 22:38:37 [INFO] Read timed out
2011-05-06 22:38:50 [INFO] Read timed out
2011-05-06 22:39:09 [INFO] Read timed out
2011-05-06 22:40:38 [INFO] Read timed out
2011-05-06 22:41:28 [INFO] Read timed out
2011-05-06 22:41:34 [INFO] Read timed out
2011-05-06 22:41:55 [INFO] Connection reset
2011-05-06 22:42:34 [INFO] Read timed out
2011-05-06 22:42:37 [INFO] Read timed out
2011-05-06 22:43:10 [INFO] Connection reset
2011-05-06 22:44:27 [INFO] Read timed out
2011-05-06 22:44:49 [INFO] Read timed out
2011-05-06 22:45:01 [INFO] Read timed out
2011-05-06 22:46:15 [INFO] Read timed out
2011-05-06 22:47:00 [INFO] Connection reset
2011-05-06 22:47:24 [INFO] Read timed out
2011-05-06 22:47:43 [INFO] Read timed out
2011-05-06 22:48:08 [INFO] Read timed out
2011-05-06 22:48:09 [INFO] Read timed out
2011-05-06 22:49:46 [INFO] Read timed out
2011-05-06 22:50:13 [INFO] Read timed out
2011-05-06 22:50:13 [INFO] Connection reset
2011-05-06 22:51:27 [INFO] Read timed out
2011-05-06 22:51:30 [INFO] Read timed out
2011-05-06 22:52:48 [INFO] Read timed out
2011-05-06 22:55:01 [INFO] Read timed out
2011-05-06 22:55:16 [INFO] Read timed out
2011-05-06 22:55:42 [INFO] Read timed out
2011-05-06 22:56:56 [INFO] Connection reset
2011-05-06 22:57:03 [INFO] Read timed out
2011-05-06 22:58:24 [INFO] Read timed out
2011-05-06 22:58:29 [INFO] Read timed out
2011-05-06 22:59:58 [INFO] Read timed out
2011-05-06 23:02:23 [INFO] Read timed out
2011-05-06 23:02:27 [INFO] Read timed out
2011-05-06 23:02:48 [INFO] Read timed out
2011-05-06 23:02:51 [INFO] Read timed out
2011-05-06 23:03:50 [INFO] Read timed out
2011-05-06 23:04:34 [INFO] Read timed out

I run on a 64bit windows 7 computer with java 6 update 25 my current plugins are

 

@ExplosiveBacoN Hmmm, never seen that error before, but from what I can tell, looks like a corrupt mob spawner or something, since it's specifically referencing mob spawners and that looks like a corrupted world error. Do you have any mods that can modify the mob that gets spawned, and is this a custom world from single player? Does the crash only occur when you get near a certain area, or as soon as you turn on the server, or as soon as a player tries to connect?

 

Honestly I have no clue, the problem occurs when the server runs for serveral hours. Also I have the mob limiter plugin and worldguard to prevent mobs from spawning in areas or at all. If thats the cause then I'm screwed, plus I can't really test this since it would have to run all night before the serror would pop up.
Edit--------------------------------
Also we run a 24/7 minecraft server with almost 2000 members so this is a servere problem to our uptime and reliability.

 

Hmmmm, it's probably not either of those plugins, and from the way you say the error comes about it's probably a player wandering within range for the server to load it, therefore causing the crash only when that player gets close enough. Have any backups you can roll back to, because I can't think of any easy ways to fix this one. If it is a corrupted mob spawner like I think it might be, you could probably delete all mob spawners within the world with MCEdit, but I'm not exactly sure.

 

No backups unfortunatley; crap though, never really relied on mcedit for these sort of things.

*bump* Anyone?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Same Problem here. But it was fine in 1.4...