YARN-4251. TestAMRMClientOnRMRestart#testAMRMClientOnAMRMTokenRollOverOnRMRestart is failing. Contributed by Brahma Reddy Battula.

hadoop-yarn-project/CHANGES.txt

@@ -1028,6 +1028,9 @@ Release 2.8.0 - UNRELEASED
     YARN-4302. SLS not able start due to NPE in SchedulerApplicationAttempt
     (Bibin A Chundatt via vvasudev)
 
+    YARN-4251. TestAMRMClientOnRMRestart#testAMRMClientOnAMRMTokenRollOverOnRMRestart
+    is failing. (Brahma Reddy Battula via ozawa)
+
 Release 2.7.2 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/api/impl/TestAMRMClientOnRMRestart.java

@@ -27,6 +27,7 @@ import java.util.List;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.net.NetworkTopology;
+import org.apache.hadoop.net.ServerSocketUtil;
 import org.apache.hadoop.security.SecurityUtil;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.token.SecretManager.InvalidToken;
@@ -458,7 +459,8 @@ public class TestAMRMClientOnRMRestart {
       .getMasterKey().getKeyId() == newToken.decodeIdentifier().getKeyId());
 
     // start 2nd RM
-    conf.set(YarnConfiguration.RM_SCHEDULER_ADDRESS, "0.0.0.0:9030");
+    conf.set(YarnConfiguration.RM_SCHEDULER_ADDRESS, "0.0.0.0:"
+        + ServerSocketUtil.getPort(45020, 10));
     final MyResourceManager2 rm2 = new MyResourceManager2(conf, memStore);
     rm2.start();
     nm1.setResourceTrackerService(rm2.getResourceTrackerService());