The maxRunningTasks property of the LimitTasksPerJob scheduler is ambiguous in
its description, and must be updated
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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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