Kimahriman commented on a change in pull request #35085:
URL: https://github.com/apache/spark/pull/35085#discussion_r785453278
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File path: core/src/main/scala/org/apache/spark/util/Utils.scala
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@@ -2742,6 +2743,16 @@ private[spark] object Utils extends Logging {
new File(path.getAbsolutePath + "." + UUID.randomUUID())
}
+ /**
+ * Creates a file with group write permission.
+ */
+ def createFileAsGroupWritable(file: File): Unit = {
+ val perms = PosixFilePermissions.fromString("rw-rw----")
+ val path = file.toPath
+ Files.createFile(path)
+ Files.setPosixFilePermissions(path, perms)
Review comment:
Based on the comment
```
* TODO: Find out why can't we create a dir using java api with permission 770
* Files.createDirectories(mergeDir.toPath,
PosixFilePermissions.asFileAttribute(
* PosixFilePermissions.fromString("rwxrwx---")))
```
I'm thinking it might be a umask issue? The permissions you give it during
dir creation will be affected by the umask, and the way around that is to
create the dir and then change its permissions.
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