Karthik Kambatla created MAPREDUCE-5110:
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Summary: Long task launch delays can lead to multiple parallel
attempts of the task
Key: MAPREDUCE-5110
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5110
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: tasktracker
Affects Versions: 1.1.2
Reporter: Karthik Kambatla
Assignee: Karthik Kambatla
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.
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