rdblue commented on issue #23608: [SPARK-26682][SQL] Use taskAttemptID instead of attemptNumber for Hadoop. URL: https://github.com/apache/spark/pull/23608#issuecomment-457001207 @gatorsmile, the main point is that Spark currently violates the contract for Hadoop OutputCommitter. A commonly-used committer that makes this assumption is FileOutputCommitter: https://github.com/apache/hadoop/blob/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/output/FileOutputCommitter.java#L266-L269.
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