YARN-4393. Fix intermittent test failure for TestResourceLocalizationService#testFailedDirsResourceRelease (Varun Saxana via rohithsharmaks)

hadoop-yarn-project/CHANGES.txt

@@ -105,6 +105,9 @@ Release 2.9.0 - UNRELEASED
     YARN-4535. Fix checkstyle error in CapacityScheduler.java
     (Naganarasimha G R via rohithsharmaks)
 
+    YARN-4393. Fix intermittent test failure for TestResourceLocalizationService
+    #testFailedDirsResourceRelease (Varun Saxana via rohithsharmaks)
+
 Release 2.8.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/TestResourceLocalizationService.java

@@ -2629,6 +2629,8 @@ public class TestResourceLocalizationService {
           new ApplicationLocalizationEvent(
             LocalizationEventType.DESTROY_APPLICATION_RESOURCES, app);
       spyService.handle(destroyApp);
+      // Waits for APPLICATION_RESOURCES_CLEANEDUP event to be handled.
+      dispatcher.await();
       verify(applicationBus).handle(argThat(matchesAppDestroy));
 
       // verify we got the right delete calls