On Job page of MR application master, the task attempts have a nice breakdown of different state: running, failed.... But for map/reduce task level, there's only one links to all tasks without breakdown for different states:
pending, running, complete, etc.
With Hadoop 1, the similar functionality exists: user can go thru jobtracker-> job-> map/reduce tasks -> attempts.
This ticket will improve the usability to allow user to go job-> total, pending, running, complete Map/Reduce task.