Kimahriman commented on a change in pull request #35085:
URL: https://github.com/apache/spark/pull/35085#discussion_r829148170



##########
File path: core/src/main/scala/org/apache/spark/storage/DiskBlockManager.scala
##########
@@ -94,7 +98,16 @@ private[spark] class DiskBlockManager(
       } else {
         val newDir = new File(localDirs(dirId), "%02x".format(subDirId))
         if (!newDir.exists()) {
-          Files.createDirectory(newDir.toPath)
+          val path = newDir.toPath
+          Files.createDirectory(path)
+          if (shuffleServiceRemoveShuffleEnabled) {

Review comment:
       We can't do it here because we need to make sure all blockmgr dirs are 
created with group write permission, not matter what type of file causes the 
dir creation. We potentially can in `createTempFileWith`

##########
File path: core/src/main/scala/org/apache/spark/storage/DiskBlockManager.scala
##########
@@ -94,7 +98,16 @@ private[spark] class DiskBlockManager(
       } else {
         val newDir = new File(localDirs(dirId), "%02x".format(subDirId))
         if (!newDir.exists()) {
-          Files.createDirectory(newDir.toPath)
+          val path = newDir.toPath
+          Files.createDirectory(path)
+          if (shuffleServiceRemoveShuffleEnabled) {

Review comment:
       We can't do it here because we need to make sure all blockmgr dirs are 
created with group write permission, no matter what type of file causes the dir 
creation. We potentially can in `createTempFileWith`




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