patrickliu created SPARK-8323:
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Summary: Remove mapOutputTracker field in TaskSchedulerImpl
Key: SPARK-8323
URL: https://issues.apache.org/jira/browse/SPARK-8323
Project: Spark
Issue Type: Improvement
Components: Scheduler, Spark Core
Reporter: patrickliu
Because TaskSchedulerImpl's mapOutputTracker field is only referenced once in
TaskSetManager.
I think we could remove the mapOutputTracker field in the TaskSchedulerImpl
class.
Instead, we could reference the mapOutputTracker from SparkEnv directly in
TaskSetManager.
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