[MAPREDUCE-5110] Kill task early in case of long task launch delays

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 1.1.2
• Component/s: tasktracker
• Target Version/s: 1.3.0
• Assignee: Karthik Kambatla
• Reporter: Karthik Kambatla
• Created: 28/Mar/13 00:58
• Updated: 03/Nov/14 18:34
• Resolved: 12/Mar/14 18:44

Description

If a task takes too long to launch, the JT expires the task and schedules another attempt. The earlier attempt can start after the later attempt leading to two parallel attempts running at the same time. This is particularly an issue if the user turns off speculation and expects a single attempt of a task to run at any point in time.