Server excecuting commands

How can i see which command the server is trying to execute? because im getting:

Code:

23.04 17:11:42 [Server] INFO Unknown command. Type "help" for help.
23.04 16:11:42 [Server] INFO Unknown command. Type "help" for help.
23.04 16:11:42 [Server] INFO Unknown command. Type "help" for help.
23.04 16:11:42 [Server] INFO Unknown command. Type "help" for help.
23.04 16:11:42 [Server] INFO Unknown command. Type "help" for help.
23.04 16:11:42 [Server] INFO Unknown command. Type "help" for help.

every 30 seconds or so in the console.

 

Start by listing your CraftBukkit version and plugins.

 

I know which plugin causes it. I just want to be able to see which commands the server((Bukkit.getConsoleSender()) is executing.