[MAPREDUCE-3402] AMScalability test of Sleep job with 100K 1-sec maps regressed into running very slowly

• Type: Sub-task
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.23.0
• Fix Version/s: 0.23.1
• Component/s: applicationmaster, mrv2
• Assignee: Vinod Kumar Vavilapalli
• Reporter: Vinod Kumar Vavilapalli
• Created: 15/Nov/11 15:27
• Updated: 05/Mar/12 02:49
• Resolved: 09/Jan/12 23:29

Description

The world was rosier before October 19-25, karams says.

The 100K 1 second sleep job used to take around 800mins or 13-14 mins. It now runs till 45 mins and still manages to complete only about 45K tasks.

One/more of the flurry of commits for 0.23.0 deserve(s) the blame.