cloud-fan commented on code in PR #52606:
URL: https://github.com/apache/spark/pull/52606#discussion_r2495524659
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core/src/main/scala/org/apache/spark/MapOutputTracker.scala:
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@@ -689,9 +689,17 @@ private[spark] abstract class MapOutputTracker(conf:
SparkConf) extends Logging
def getShufflePushMergerLocations(shuffleId: Int): Seq[BlockManagerId]
/**
- * Deletes map output status information for the specified shuffle stage.
+ * Deletes the single-source-of-truth map output status information for
+ * the specified shuffle stage. This currently should only be called
+ * through [[ContextCleaner]] when the shuffle is considered no longer
+ * referenced anywhere.
*/
- def unregisterShuffle(shuffleId: Int): Unit
+ def unregisterShuffle(shuffleId: Int): Unit = {}
Review Comment:
```suggestion
def unregisterShuffle(shuffleId: Int): Unit
```
alll sub-classes should implement it, as before
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