i/o timeout

Players on my server keep disconnecting with this error: http://prntscr.com/2u1q1l (Underlined in red)

Help?

For the sake of your players, I would cover up there IP's.

And, from past experiences, an I/O error means is that there is an error that is causing your computer to have problems reading data. Though I got a I/O error by using a new disk usb drive. A simple restart worked to fix this. So, if you have full access to your server(not just your minecraft server) I would try a restart. Other than that little knowledge that I have, I would suggest posting a little more information. A nine word, not even a sentence, is not enough information to solve something. And a simple, "Help?", is somewhat impolite. Also, reading the READ ME BEFORE YOU POST, might have been helpful: http://www.lilypadmc.org/threads/read-me-what-you-need-to-know-before-posting.353/ . Please include configs also.