Github user xuanyuanking commented on a diff in the pull request:
https://github.com/apache/spark/pull/21293#discussion_r188273722
--- Diff: core/src/main/scala/org/apache/spark/MapOutputTracker.scala ---
@@ -769,6 +796,43 @@ private[spark] class MapOutputTrackerWorker(conf:
SparkConf) extends MapOutputTr
}
}
+/**
+ * MapOutputTrackerWorker for continuous processing, the main difference
with MapOutputTracker
+ * is waiting for a time when the upstream's map output status not ready.
--- End diff --
The current implement of ContinuousShuffleMapOutputTracker didn't change
existing behavior, just choose the corresponding output tracker instance by the
job type. After we use a better way of mark a job is continuous mode(discuss in
https://github.com/apache/spark/pull/21293#discussion-diff-187368178R231), they
do different things and not use same codepath.
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