I had 3 jobs running and I saw something a bit odd. Two of the tasks are reducing, one of them is using all the reducers so the other is waiting, this is OK. However the 3rd job is still in the mapping phase and even though the web interface shows map capacity at 96 I only see about 7-12 mappers actually running. I'm wondering if theres some setting I need to change, perhaps I've hit some system limit. Can someone point me in the right direction please?
The other thing was that with the two jobs that are in the reducing phase, the reducer for one job wouldn't actually start until all the mappers of the _other_ job completed which seems kind of odd. Is this expected ? thanks, M
