Random Server Crashing

My server randomly crashes, and spams console/logs with the same error. The spam causes a fresh logs file to become 200MB+.

First set of errors, which is spammed at first:

Code:

[SEVERE] java.lang.NullPointerException
[SEVERE]    at java.io.ByteArrayInputStream.<init>(ByteArrayInputStream.java:106)
[SEVERE]    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:1371)
[SEVERE]    at net.minecraft.server.Packet250CustomPayload.handle(SourceFile:56)
[SEVERE]    at net.minecraft.server.NetworkManager.b(NetworkManager.java:282)
[SEVERE]    at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:109)
[SEVERE]    at net.minecraft.server.ServerConnection.b(SourceFile:35)
[SEVERE]    at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)
[SEVERE]    at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:577)
[SEVERE]    at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:213)
[SEVERE]    at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:473)
[SEVERE]    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:405)
[SEVERE]    at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)

Second set of errors, which are spammed after first set is over:

Code:

[SEVERE] java.lang.NullPointerException

During the first set of errors no one can join the server, execute commands, load chunks, or anything of that sort. Although they can still chat.

 

an u post a list of your plugins

 

http://forums.bukkit.org/threads/you-need-help-we-need-this-information-to-help-you.2018/

 

OS: Debian
OS architecture: 64 bit
Java version/architecture: 1.7.0_05/64 bit
Wrapper: Multicraft
Craftbukkit version: #2377
Command to run bukkit server: "{JAVA}" -Xmx20480M -Xms20480M -Djline.terminal=jline.UnsupportedTerminal -jar craftbukkit-1.3.2-R1.0.jar nogui