Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/9610#discussion_r44743137
--- Diff:
core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala ---
@@ -93,6 +154,31 @@ private[spark] class IndexShuffleBlockResolver(conf:
SparkConf) extends ShuffleB
} {
out.close()
}
+
+ val dataFile = getDataFile(shuffleId, mapId)
+ // Note: there is only one IndexShuffleBlockResolver per executor
+ synchronized {
+ val existedLengths = checkIndexAndDataFile(indexFile, dataFile,
lengths.length)
+ if (existedLengths != null) {
+ // Use the lengths of existed output for MapStatus
--- End diff --
```
// A previous attempt has already written the map outputs for this task,
// so just use them and delete the ones we've written
```
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