Hi,
In the "syslog" for a MapReduce job flow step, I see the following:
Job Counters
Launched reduce tasks=4
Launched map tasks=39
Does the number of launched map tasks include failed tasks?
I am using NLineInputFormat class as input format to manage the number of map tasks.
However, I get slightly different numbers for exact same input occasionally, or depending on the number of instances (10, 15, and 20).
Can anyone tell me why I am seeing different number of tasks launched?