mridulm commented on code in PR #42296:
URL: https://github.com/apache/spark/pull/42296#discussion_r1292611462
##########
core/src/main/scala/org/apache/spark/MapOutputTracker.scala:
##########
@@ -1288,6 +1288,30 @@ private[spark] class MapOutputTrackerWorker(conf:
SparkConf) extends MapOutputTr
mapSizesByExecutorId.iter
}
+ def getMapOutputLocationWithRefresh(
+ shuffleId: Int,
+ mapId: Long,
+ prevLocation: BlockManagerId): BlockManagerId = {
+ // Try to get the cached location first in case other concurrent tasks
+ // fetched the fresh location already
+ var currentLocationOpt = getMapOutputLocation(shuffleId, mapId)
+ if (currentLocationOpt.isDefined && currentLocationOpt.get ==
prevLocation) {
+ // Address in the cache unchanged. Try to clean cache and get a fresh
location
+ unregisterShuffle(shuffleId)
+ currentLocationOpt = getMapOutputLocation(shuffleId, mapId)
+ }
+ if (currentLocationOpt.isEmpty) {
+ throw new MetadataFetchFailedException(shuffleId, -1,
+ message = s"Failed to get map output location for shuffleId
$shuffleId, mapId $mapId")
+ }
+ currentLocationOpt.get
Review Comment:
Let us filter it out here, and add support for fetching from fallback in a
separate pr.
+CC @dongjoon-hyun as well.
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