Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20082#discussion_r158897401
--- Diff: core/src/main/scala/org/apache/spark/TaskContext.scala ---
@@ -150,6 +150,11 @@ abstract class TaskContext extends Serializable {
*/
def stageId(): Int
+ /**
+ * An ID that is unique to the stage attempt that this task belongs to.
+ */
+ def stageAttemptId(): Int
--- End diff --
I think we should call it `stageAttempNumber` to be consistent with
`taskAttemptNumber`. Also let's follow the comment of `attemptNumber`
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