Karthik Kambatla created MAPREDUCE-5110: -------------------------------------------
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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira