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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