cloud-fan commented on a change in pull request #27604:
URL: https://github.com/apache/spark/pull/27604#discussion_r494738627
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File path: core/src/main/scala/org/apache/spark/MapOutputTracker.scala
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@@ -851,8 +852,16 @@ private[spark] class MapOutputTrackerWorker(conf:
SparkConf) extends MapOutputTr
var fetchedStatuses = mapStatuses.get(shuffleId).orNull
if (fetchedStatuses == null) {
logInfo("Doing the fetch; tracker endpoint = " + trackerEndpoint)
- val fetchedBytes =
askTracker[Array[Byte]](GetMapOutputStatuses(shuffleId))
- fetchedStatuses =
MapOutputTracker.deserializeMapStatuses(fetchedBytes, conf)
+ try {
+ val fetchedBytes =
askTracker[Array[Byte]](GetMapOutputStatuses(shuffleId))
+ fetchedStatuses =
MapOutputTracker.deserializeMapStatuses(fetchedBytes, conf)
+ } catch {
+ case e: IOException if
+
Throwables.getCausalChain(e).asScala.exists(_.isInstanceOf[BlockNotFoundException])
=>
+ mapStatuses.clear()
Review comment:
But here is the broadcast being invalid issue. I don't think it usually
happens for a lot of shuffles at the same time.
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