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https://issues.apache.org/jira/browse/SPARK-1771?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-1771.
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Resolution: Won't Fix
The PR says this was abandoned in favor of SPARK-4004
> CoarseGrainedSchedulerBackend is not resilient to Akka restarts
> ---------------------------------------------------------------
>
> Key: SPARK-1771
> URL: https://issues.apache.org/jira/browse/SPARK-1771
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Reporter: Aaron Davidson
>
> The exception reported in SPARK-1769 was propagated through the
> CoarseGrainedSchedulerBackend, and caused an Actor restart of the
> DriverActor. Unfortunately, this actor does not seem to have been written
> with Akka restartability in mind. For instance, the new DriverActor has lost
> all state about the prior Executors without cleanly disconnecting them. This
> means that the driver actually has executors attached to it, but doesn't
> think it does, which leads to mayhem of various sorts.
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