Did you accidentally click REMOVE in the server console and delete a decision service?

CNTL-Z won't bring it back I'm afraid. So how do you find out which one got removed?

Try looking here in the localhost_access_log.2015-03-27.txt: - - [27/Mar/2015:17:31:12 -0400] "GET /axis/CcDecisionServices.jsp?servicename=mortgageTest2&majorversion=1&minorversion=0&action=remove HTTP/1.1" 200 75793 244

You may still have to redeploy it, but at least you know which one it was.

Unfortunately you cannot  (currently) tell who removed it.