Github user fangshil commented on a diff in the pull request:
https://github.com/apache/spark/pull/20931#discussion_r179346911
--- Diff:
core/src/main/scala/org/apache/spark/internal/io/HadoopMapReduceCommitProtocol.scala
---
@@ -186,7 +186,9 @@ class HadoopMapReduceCommitProtocol(
logDebug(s"Clean up default partition directories for overwriting:
$partitionPaths")
for (part <- partitionPaths) {
val finalPartPath = new Path(path, part)
- fs.delete(finalPartPath, true)
+ if (!fs.delete(finalPartPath, true) &&
!fs.exists(finalPartPath.getParent)) {
+ fs.mkdirs(finalPartPath.getParent)
--- End diff --
@cloud-fan yes, in official HDFS
document(https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-common/filesystem/filesystem.html),
the rename command has precondition "dest must be root, or have a parent that
exists"
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