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From "Harsh J (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-2640) The maxRunningTasks property of the LimitTasksPerJob scheduler is ambiguous in its description, and must be updated
Date Mon, 04 Jul 2011 06:45:22 GMT
The maxRunningTasks property of the LimitTasksPerJob scheduler is ambiguous in its description,
and must be updated
-------------------------------------------------------------------------------------------------------------------

                 Key: MAPREDUCE-2640
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2640
             Project: Hadoop Map/Reduce
          Issue Type: Task
          Components: documentation
    Affects Versions: 0.20.2
            Reporter: Harsh J
            Assignee: Harsh J
             Fix For: 0.23.0


The property's entry in mapred-default.xml is like so:

{code}
<property>
  <name>mapreduce.jobtracker.taskscheduler.maxrunningtasks.perjob</name>
  <value></value>
  <description>The maximum number of running tasks for a job before
  it gets preempted. No limits if undefined.
  </description>
</property>
{code}

There is no mention that this is a property exclusive to the LimitTasksPerJob scheduler alone.
The doc ought to be updated to note that unless there's a plan of reusing such a property
(I do not see fair or capacity schedulers utilizing this, and they use their own configs).

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