Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/8766#discussion_r39536647
--- Diff: core/src/main/scala/org/apache/spark/util/Clock.scala ---
@@ -65,3 +75,18 @@ private[spark] class SystemClock extends Clock {
-1
}
}
+
+/**
+ * A clock whose time monotonically increases, irrespective of
+ * changes in the system clock (VM host clock shift, operations or NTP
+ * initiated time shift)
+ */
+private[spark] class MonotonicClock extends SystemClock {
+ /**
+ * @return the same time in milliseconds
--- End diff --
nit: whole comment fits on the same line.
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