YARN-11609. [Addendum] [Federation] Router Supports DeregisterSubCluster. (#6254) YuanBen Wang.

Reviewed-by: Shilun Fan <slfan1989@apache.org>
Signed-off-by: Shilun Fan <slfan1989@apache.org>

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/rmadmin/FederationRMAdminInterceptor.java

@@ -153,7 +153,7 @@ public class FederationRMAdminInterceptor extends AbstractRMAdminRequestIntercep
 
     this.heartbeatExpirationMillis = this.conf.getTimeDuration(
         YarnConfiguration.ROUTER_SUBCLUSTER_EXPIRATION_TIME,
-        YarnConfiguration.DEFAULT_ROUTER_SUBCLUSTER_EXPIRATION_TIME, TimeUnit.MINUTES);
+        YarnConfiguration.DEFAULT_ROUTER_SUBCLUSTER_EXPIRATION_TIME, TimeUnit.MILLISECONDS);
   }
 
   @VisibleForTesting