[MAPREDUCE-3985] handleTaskAttemptCompletion() called twice for same task attempt from KillWaitAttemptKilledTransition & AttemptKilledTransition

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 0.23.0
• Fix Version/s: 0.23.2
• Component/s: mr-am
• Assignee: Bikas Saha
• Reporter: Bikas Saha
• Created: 07/Mar/12 23:03
• Updated: 07/Mar/12 23:16
• Resolved: 07/Mar/12 23:16

Description

TaskImpl state changes to KILL_WAIT after an AttemptKilledTransition. When the attempt reports that it has actually been killed then KILL_WAIT transitions out via the KillWaitAttemptKilledTransition. Both these transitions send task completion events to Job with the same Killed state.

The handler simply puts them in a list and so nothing bad has happened till now.