Randome server error please help

2011-05-19 15:30:48 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2011-05-19 15:31:17 [SEVERE] Exception in thread "TimerQueue"
2011-05-19 15:31:17 [SEVERE] java.lang.OutOfMemoryError: Java heap space
2011-05-19 15:31:17 [SEVERE] at javax.swing.Timer.post(Timer.java:612)
2011-05-19 15:31:17 [SEVERE] at javax.swing.TimerQueue.run(TimerQueue.java:177)
2011-05-19 15:31:17 [SEVERE] at java.lang.Thread.run(Thread.java:636)
2011-05-19 15:31:29 [SEVERE] Exception in thread "Connection #1554 read thread"
2011-05-19 15:31:29 [SEVERE] java.lang.OutOfMemoryError: Java heap space
2011-05-19 15:31:29 [SEVERE] at java.net.SocketInputStream.read(SocketInputStream.java:198)
2011-05-19 15:31:29 [SEVERE] at java.io.FilterInputStream.read(FilterInputStream.java:83)
2011-05-19 15:31:29 [SEVERE] at net.minecraft.server.Packet.a(Packet.java:72)
2011-05-19 15:31:30 [SEVERE] at net.minecraft.server.NetworkManager.f(NetworkManager.java:128)
2011-05-19 15:31:30 [SEVERE] at net.minecraft.server.NetworkManager.c(NetworkManager.java:227)
2011-05-19 15:31:30 [SEVERE] at net.minecraft.server.NetworkReaderThread.run(SourceFile:69)
2011-05-19 15:31:45 [SEVERE] Exception in thread "Connection #1552 read thread"
2011-05-19 15:31:45 [SEVERE] java.lang.OutOfMemoryError: Java heap space
2011-05-19 15:31:50 [SEVERE] at java.net.SocketInputStream.read(SocketInputStream.java:198)
2011-05-19 15:31:50 [SEVERE] at java.io.DataInputStream.readShort(DataInputStream.java:313)
2011-05-19 15:31:50 [SEVERE] at net.minecraft.server.Packet15Place.a(SourceFile:33)
2011-05-19 15:31:50 [SEVERE] at net.minecraft.server.Packet.a(Packet.java:86)
2011-05-19 15:31:50 [SEVERE] at net.minecraft.server.NetworkManager.f(NetworkManager.java:128)
2011-05-19 15:31:50 [SEVERE] at net.minecraft.server.NetworkManager.c(NetworkManager.java:227)
2011-05-19 15:31:51 [SEVERE] at net.minecraft.server.NetworkReaderThread.run(SourceFile:69)
2011-05-19 15:31:51 [SEVERE] java.lang.OutOfMemoryError: Java heap space
2011-05-19 15:31:51 [SEVERE] at net.minecraft.server.NBTTagByteArray.a(SourceFile:21)
2011-05-19 15:31:51 [SEVERE] at net.minecraft.server.NBTBase.b(SourceFile:64)
2011-05-19 15:31:51 [SEVERE] at net.minecraft.server.NBTTagCompound.a(SourceFile:19)
2011-05-19 15:31:51 [SEVERE] at net.minecraft.server.NBTBase.b(SourceFile:64)
2011-05-19 15:31:57 [SEVERE] at net.minecraft.server.NBTTagCompound.a(SourceFile:19)
2011-05-19 15:31:57 [SEVERE] at net.minecraft.server.NBTBase.b(SourceFile:64)
2011-05-19 15:31:57 [SEVERE] at net.minecraft.server.CompressedStreamTools.a(SourceFile:46)
2011-05-19 15:31:57 [SEVERE] at net.minecraft.server.ChunkRegionLoader.a(SourceFile:29)
2011-05-19 15:31:57 [SEVERE] at net.minecraft.server.ChunkProviderServer.loadChunk(ChunkProviderServer.java:132)
2011-05-19 15:32:01 [INFO] Stopping server

 

What is the startup script you use to launch your server?

 

this is it
screen -S minecraft java -Xmx1024M -Xms1024M -jar craftbukkit.jar nogui

my server has 4gigs

any news ???

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

 

Try upping the 1024M to 2048 (2GB instead of 1), see if it helps? The error does say out of memory.

 

Try this (if you have x86):

Code:

screen -S minecraft java -Xincgc -Xmx1536M -jar craftbukkit.jar nogui

Try this (if you have x64):

Code:

screen -S minecraft java -Xincgc -Xmx2G -jar craftbukkit.jar nogui

Post results.