slfan1989 commented on code in PR #4396:
URL: https://github.com/apache/hadoop/pull/4396#discussion_r892486695


##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/test/java/org/apache/hadoop/yarn/server/router/clientrm/TestFederationClientInterceptor.java:
##########
@@ -898,4 +909,141 @@ public void testGetResourceTypeInfoRequest() throws 
Exception {
         
interceptor.getResourceTypeInfo(GetAllResourceTypeInfoRequest.newInstance());
     Assert.assertEquals(2, response.getResourceTypeInfo().size());
   }
+
+  @Test
+  public void testFailApplicationAttempt() throws Exception {
+    LOG.info("Test FederationClientInterceptor : Fail Application Attempt 
request.");
+
+    // null request
+    LambdaTestUtils.intercept(YarnException.class, "Missing 
failApplicationAttempt request " +
+        "or applicationId or applicationAttemptId information.",
+        () -> interceptor.failApplicationAttempt(null));
+
+    // normal request
+    ApplicationId appId =
+        ApplicationId.newInstance(System.currentTimeMillis(), 1);
+    SubmitApplicationRequest request = mockSubmitApplicationRequest(appId, 
APP_PRIORITY_ZERO);
+
+    // Submit the application
+    SubmitApplicationResponse response = 
interceptor.submitApplication(request);
+
+    Assert.assertNotNull(response);
+    Assert.assertNotNull(stateStoreUtil.queryApplicationHomeSC(appId));
+
+    // Call GetApplicationAttempts
+    GetApplicationAttemptsRequest attemptsRequest =
+        GetApplicationAttemptsRequest.newInstance(appId);
+    GetApplicationAttemptsResponse attemptsResponse =
+        interceptor.getApplicationAttempts(attemptsRequest);
+
+    // Wait for app to start
+    while(attemptsResponse.getApplicationAttemptList().size() == 0) {

Review Comment:
   Thanks for the suggestion, I will modify this part of the code.



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