squito commented on a change in pull request #23393: [SPARK-26288][CORE]add 
initRegisteredExecutorsDB
URL: https://github.com/apache/spark/pull/23393#discussion_r263434370
 
 

 ##########
 File path: core/src/test/scala/org/apache/spark/deploy/worker/WorkerSuite.scala
 ##########
 @@ -243,4 +244,59 @@ class WorkerSuite extends SparkFunSuite with Matchers 
with BeforeAndAfter {
       ExecutorStateChanged("app1", 0, ExecutorState.EXITED, None, None))
     assert(cleanupCalled.get() == value)
   }
+
+  test("removes our metadata of all executors registered for the given " +
+    "application after WorkDirCleanup when config 
spark.shuffle.service.db.enabled=true") {
+    testWorkDirCleanupAndRemoveMetadataWithConfig(true)
+  }
+
+  test("don't removes our metadata of all executors registered for the given " 
+
+    "application after WorkDirCleanup when config 
spark.shuffle.service.db.enabled=false") {
 
 Review comment:
   minor -- as I mentioned below, both of these tests should still test dir 
cleanup, so maybe we can rename a little to something like
   
   WorkDirCleanup cleans app dirs and shuffle metadata when 
spark.shuffle.service.db.enabled=true
   
   WorkdDirCleanup cleans only app dirs when 
spark.shuffle.service.db.enabled=false

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