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:
220.127.116.11 - - [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.