Hi, I tried to fix MAPREDUCE-5748
What I did is to add another condition in addition to checking for nulls. I'm checking whether mapIds is empty or not if (mapIds == null || mapIds.size() == 0 || reduceQ == null || jobQ == null) I also created a unit test where 'map' param is missing. I'm not sure about the quality of the unit test but I tried my best. Here in the email, you can find a patch file. Thanks for help and time. Best, Hussein. -- *Deep into that darkness peering, long I stood there, wondering, fearing, doubting, dreaming dreams no mortal ever dared to dream before. Edgar Allan Poe*
