dongjoon-hyun commented on a change in pull request #35085:
URL: https://github.com/apache/spark/pull/35085#discussion_r829643778



##########
File path: 
core/src/test/scala/org/apache/spark/storage/DiskBlockManagerSuite.scala
##########
@@ -141,6 +141,20 @@ class DiskBlockManagerSuite extends SparkFunSuite with 
BeforeAndAfterEach with B
     assert(attemptId.equals("1"))
   }
 
+  test("SPARK-37618: Sub dirs are group writable") {
+    val conf = testConf.clone
+    conf.set("spark.local.dir", rootDirs)
+    conf.set("spark.shuffle.service.enabled", "true")
+    conf.set("spark.shuffle.service.removeShufle", "true")

Review comment:
       We need to a negative test case whose config is 
`spark.shuffle.service.removeShufle`.
   
   According to the AS-IS PR, we don't have a test coverage because the default 
was `true`.




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