Jiang Xingbo created SPARK-25074:
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Summary: Implement maxNumConcurrentTasks() in
MesosFineGrainedSchedulerBackend
Key: SPARK-25074
URL: https://issues.apache.org/jira/browse/SPARK-25074
Project: Spark
Issue Type: Task
Components: Spark Core
Affects Versions: 2.4.0
Reporter: Jiang Xingbo
We added a new method `maxNumConcurrentTasks()` to `SchedulerBackend` to get
the max number of tasks that can be concurrent launched currently. However the
method is not implemented in `MesosFineGrainedSchedulerBackend`, so submit a
job containing barrier stage shall always fail fast with
`MesosFineGrainedSchedulerBackend` resource manager.
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