Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/14223#discussion_r71024004
--- Diff: core/src/main/scala/org/apache/spark/util/Clock.scala ---
@@ -21,7 +21,14 @@ package org.apache.spark.util
* An interface to represent clocks, so that they can be mocked out in
unit tests.
*/
private[spark] trait Clock {
+ /** @return the time in milliseconds */
def getTimeMillis(): Long
+
+ /**
+ * Wait until a clock's view of current time reaches the specified
target time.
+ * @param targetTime block until the current time is at least this value
--- End diff --
nit: blank line before argument list
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