Original User: javidel
Luis,
Judging by your log file, it seems like corruption in one of your geoevent definition files is causing the problem. Unfortunately, this occasionally happens if GEP exits unexpectedly or is force-killed.
At this point, I'd recommend renaming the directory C:\ProgramData\ESRI\GeoEventProcessor\geoeventdefinitions to something like C:\ProgramData\ESRI\GeoEventProcessor\geoeventdefinitions.original and restarting GEP. That should get you up and running again, although you will have to recreate any GeoEvent Definitions you authored manually after a restart.
Let us know if this gets you up and running again.
-Javier