[MAPREDUCE-1158] running_maps is not decremented when the tasks of a job is killed/failed

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.22.0
• Fix Version/s: 0.21.0
• Component/s: jobtracker
• Hadoop Flags: Reviewed
• Release Note: Fix Jobtracker running maps/reduces metrics.
• Assignee: Sharad Agarwal
• Reporter: Ramya Sunil
• Created: 27/Oct/09 11:06
• Updated: 24/Aug/10 21:19
• Resolved: 28/Oct/09 13:33

Description

running_maps counter in the metrics is not decremented when the tasks of a job is killed/failed. Below are the exact steps to reproduce the problem:

• Initially running_maps=0
• Submit a job with 5 maps. running_maps is set to 5
• Kill 2 attempts of a map task
• Fail 4 attempts of the same map task so that the job is finally marked killed.
• Once the job is marked killed, running_maps is set to 3 and not 0.