What causes this socket error?

23:35:28 [INFO] Icomic [/122.151.65.251:49566] logged in with entity id 28041 at
([Windfall] 456.375, 72.0, 506.53125)
23:36:23 [INFO] Connection reset
23:36:23 [INFO] Icomic lost connection: disconnect.quitting
23:36:23 [SEVERE] java.net.SocketException: Socket closed
23:36:23 [SEVERE] at java.net.SocketOutputStream.socketWrite(Unknown Sourc
e)
23:36:23 [SEVERE] at java.net.SocketOutputStream.write(Unknown Source)
23:36:23 [SEVERE] at java.io.BufferedOutputStream.flushBuffer(Unknown Sour
ce)
23:36:23 [SEVERE] at java.io.BufferedOutputStream.flush(Unknown Source)
23:36:23 [SEVERE] at java.io.DataOutputStream.flush(Unknown Source)
23:36:23 [SEVERE] at net.minecraft.server.NetworkWriterThread.run(SourceFi
le:116)
>

 

Do you get this if you disable your plugins? If not try enable your plugins one after the other and see what plugin causes the problem.

 

I have this problem on my dedicated server when I close the lid on my laptop that i've connnected with. It hasn't caused any problems i'm aware of.