YARN-9411. TestYarnNativeServices fails sporadically with bind address in use. Contributed by Prabhu Joseph.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core/src/test/java/org/apache/hadoop/yarn/service/ServiceTestUtils.java

@@ -216,6 +216,8 @@ public class ServiceTestUtils {
     LOG.info("Starting up YARN cluster");
     if (conf == null) {
       setConf(new YarnConfiguration());
+      conf.setBoolean(YarnConfiguration.YARN_MINICLUSTER_FIXED_PORTS, false);
+      conf.setBoolean(YarnConfiguration.YARN_MINICLUSTER_USE_RPC, false);
     }
     conf.setInt(YarnConfiguration.RM_SCHEDULER_MINIMUM_ALLOCATION_MB, 128);
     // reduce the teardown waiting time