Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/18714#discussion_r128919802 --- Diff: core/src/main/scala/org/apache/spark/internal/io/HadoopMapReduceCommitProtocol.scala --- @@ -52,12 +55,22 @@ class HadoopMapReduceCommitProtocol(jobId: String, path: String) */ @transient private var addedAbsPathFiles: mutable.Map[String, String] = null + @transient private var partitionPaths: mutable.Set[String] = null + + @transient private var stagingDir: Path = _ --- End diff -- `stagingDir` may not needed, but we do need `partitionPaths`, which tracks partitions with default path.
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