Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/15497#discussion_r83567889
--- Diff: core/src/main/scala/org/apache/spark/util/ManualClock.scala ---
@@ -27,6 +27,7 @@ package org.apache.spark.util
private[spark] class ManualClock(private var time: Long) extends Clock {
private var _isWaiting = false
+ private var _readyForFirstPeek = false
--- End diff --
Can you add more docs on what does peek mean, what does this variable
supposed to do?
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