Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/11505#discussion_r55181294
--- Diff: core/src/main/scala/org/apache/spark/MapOutputTracker.scala ---
@@ -376,8 +376,6 @@ private[spark] class MapOutputTrackerMaster(conf:
SparkConf)
* @param numReducers total number of reducers in the shuffle
* @param fractionThreshold fraction of total map output size that a
location must have
* for it to be considered large.
- *
- * This method is not thread-safe.
--- End diff --
Are we sure this makes it thread-safe? I agree it seems to resolve a
problem that could arise when calling this from multiple threads, but I am not
as clear it solves all of them. I'm OK with removing this if we have no
particular reason to believe it's not thread-safe at this point.
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