tgravescs commented on a change in pull request #35085:
URL: https://github.com/apache/spark/pull/35085#discussion_r823817096
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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:
I was looking more at the TEZ change and I'm not seeing how it works
either unless they are changing the default umask or I'm just missing something
(I'm trying to ask the writers of that). You either need to modify the
permissions or have it do the deletion as the user (which is how the
directories are normally cleaned up). From a security point of view opening up
permissions is not ideal.
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