Its best if you put a scene up, the error log isn't really verbose enough.
Looks like your doing fur rendering right? Take it out of your scene and see if it fails.
Also may renderer is pretty limited in terms of debugging, go on mental ray instead.
As you can see its dumping out a z depth from the camera to comp it in as a post process, which is rubbish. Makes it even more tricky to debug as something like this is happening:
Render maya scene > render fur with slightly different renderer> fudge the fur on top .
FX supervisor - double negative