05:44:31 [SEVERE] java.net.SocketException: Broken pipe call super mario but seriously post here your plugins list and post whats above this error cause i think you didnt post all and whats below
You either have Vanilla or Bukkit, so which one is it? If you have Bukkit, which version? Also post what happens before the error, the thing you posted can mean anything.
saul100 is right i just read your message wrong i was sure you mean you have normal minecraft server and not bukkit since you have bukkit just that you dont use plugins problem should be solved on this forum now if you can run your server and paste full log from the start of serve to the error here