- Server Freeze (java.lang.NullPointerException)

I've never really had any problems on my server except for about a week ago, which I would like to get rid of asap. The server randomly freezes about twice a day and times out every player that tries to connect to the server.

What does this error code look like to you?

Code:

2011-08-22 00:37:00 [SEVERE] java.lang.NullPointerException
2011-08-22 00:37:00 [SEVERE]     at net.minecraft.server.World.a(World.java:2058)
2011-08-22 00:37:00 [SEVERE]     at net.minecraft.server.SpawnerCreature.spawnEntities(SpawnerCreature.java:58)
2011-08-22 00:37:00 [SEVERE]     at net.minecraft.server.World.doTick(World.java:1715)
2011-08-22 00:37:00 [SEVERE]     at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:444)
2011-08-22 00:37:00 [SEVERE]     at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:363)
2011-08-22 00:37:00 [SEVERE]     at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)
2011-08-22 00:37:00 [SEVERE] Unexpected exception
java.lang.NullPointerException
    at net.minecraft.server.World.a(World.java:2058)
    at net.minecraft.server.SpawnerCreature.spawnEntities(SpawnerCreature.java:58)
    at net.minecraft.server.World.doTick(World.java:1715)
    at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:444)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:363)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)
2011-08-22 00:37:48 [INFO] Connection reset
2011-08-22 00:38:03 [INFO] Read timed out
2011-08-22 00:38:09 [INFO] Read timed out
2011-08-22 00:38:16 [INFO] Read timed out
2011-08-22 00:38:22 [INFO] Read timed out
2011-08-22 00:38:33 [INFO] Read timed out
2011-08-22 00:38:48 [INFO] Read timed out
2011-08-22 00:38:54 [INFO] Connection reset
2011-08-22 00:38:57 [INFO] Read timed out
2011-08-22 00:39:06 [INFO] Read timed out
2011-08-22 00:39:31 [INFO] Connection reset
2011-08-22 00:39:59 [INFO] Read timed out
2011-08-22 00:40:12 [INFO] Read timed out
2011-08-22 00:40:15 [INFO] Read timed out
2011-08-22 00:41:21 [INFO] Read timed out
2011-08-22 00:41:50 [INFO] Connection reset
2011-08-22 00:42:22 [INFO] Read timed out
2011-08-22 00:43:15 [INFO] Read timed out
2011-08-22 00:43:45 [INFO] Read timed out
2011-08-22 00:43:56 [INFO] Read timed out
2011-08-22 00:44:13 [INFO] Read timed out
2011-08-22 00:44:22 [INFO] Read timed out
2011-08-22 00:44:25 [INFO] Read timed out
2011-08-22 00:44:33 [INFO] Read timed out
2011-08-22 00:44:50 [INFO] Read timed out

I'd really appreciate some ideas!

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

 

Your world might be corrupted, try running Chunkster on it.

 

I have not had ANY problems at all after you gave me a headsup about Chunkster!
Thanks!

 

no problem