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https://issues.apache.org/jira/browse/SPARK-8323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14583033#comment-14583033
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Apache Spark commented on SPARK-8323:
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User 'yufan-liu' has created a pull request for this issue:
https://github.com/apache/spark/pull/6778
> 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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