mridulm commented on a change in pull request #35085:
URL: https://github.com/apache/spark/pull/35085#discussion_r795085545
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File path: core/src/main/scala/org/apache/spark/storage/DiskBlockManager.scala
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@@ -94,7 +95,13 @@ private[spark] class DiskBlockManager(
} else {
val newDir = new File(localDirs(dirId), "%02x".format(subDirId))
if (!newDir.exists()) {
- Files.createDirectory(newDir.toPath)
+ // SPARK-37618: Create dir as group writable so files within can be
deleted by the
+ // shuffle service
+ val path = newDir.toPath
+ Files.createDirectory(path)
+ val currentPerms = Files.getPosixFilePermissions(path)
+ currentPerms.add(PosixFilePermission.GROUP_WRITE)
Review comment:
Thanks @Kimahriman - you are correct, we should get this right. Would be
great if we can find out if there are cases where it does not work (which will
also mean the existing merge directory creation might have issues perhaps).
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