Github user edwinalu commented on a diff in the pull request: https://github.com/apache/spark/pull/21221#discussion_r191007795 --- Diff: core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala --- @@ -209,6 +210,16 @@ class DAGScheduler( private[scheduler] val eventProcessLoop = new DAGSchedulerEventProcessLoop(this) taskScheduler.setDAGScheduler(this) + /** driver heartbeat for collecting metrics */ + private val heartbeater: Heartbeater = new Heartbeater(reportHeartBeat, "driver-heartbeater", --- End diff -- Moved.
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