Github user markhamstra commented on a diff in the pull request:
https://github.com/apache/spark/pull/186#discussion_r11099324
--- Diff: core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
---
@@ -150,7 +162,10 @@ class DAGScheduler(
}
}
}))
- }
+ }))
+
+ // set the dagscheduler until after the actor system is ready
+ taskScheduler.setDAGScheduler(this)
--- End diff --
To really be sure about this, we could setDAGScheduler(this) within the
preStart() hook of eventProcessActor. During actor restart, the default
implementation of postRestart() will call preStart(), but: 1) After this PR
we're not restarting the eventProcessActor anyway; 2) Re-running
setDAGScheduler should just reset the TaskScheduler's reference back to the
same DAGScheduler instance (i.e., this.)
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