diff --git a/server-worker/src/main/scala/com/aliyun/emr/rss/service/deploy/worker/Worker.scala b/server-worker/src/main/scala/com/aliyun/emr/rss/service/deploy/worker/Worker.scala
index 88c8a61a6a1..c86296729d8 100644
--- a/server-worker/src/main/scala/com/aliyun/emr/rss/service/deploy/worker/Worker.scala
+++ b/server-worker/src/main/scala/com/aliyun/emr/rss/service/deploy/worker/Worker.scala
@@ -979,7 +979,9 @@ private[deploy] object Worker extends Logging {
     // much as possible. Therefore, if the user manually specifies the address of the Master when
     // starting the Worker, we should set it in the parameters and automatically calculate what the
     // address of the Master should be used in the end.
-    conf.set("rss.master.address", RpcAddress.fromRssURL(workerArgs.master).toString)
+    if (workerArgs.master != null) {
+      conf.set("rss.master.address", RpcAddress.fromRssURL(workerArgs.master).toString)
+    }
 
     val metricsSystem = MetricsSystem.createMetricsSystem("worker", conf, WorkerSource.ServletPath)
 
diff --git a/server-worker/src/main/scala/com/aliyun/emr/rss/service/deploy/worker/WorkerArguments.scala b/server-worker/src/main/scala/com/aliyun/emr/rss/service/deploy/worker/WorkerArguments.scala
index 188d1301d09..5a1a71f739a 100644
--- a/server-worker/src/main/scala/com/aliyun/emr/rss/service/deploy/worker/WorkerArguments.scala
+++ b/server-worker/src/main/scala/com/aliyun/emr/rss/service/deploy/worker/WorkerArguments.scala
@@ -28,7 +28,7 @@ class WorkerArguments(args: Array[String], conf: RssConf) {
   var port = 0
   // var master: String = null
   // for local testing.
-  var master: String = s"rss://$host:9097"
+  var master: String = null
   var propertiesFile: String = null
 
   parse(args.toList)
@@ -58,9 +58,6 @@ class WorkerArguments(args: Array[String], conf: RssConf) {
       parse(tail)
 
     case Nil =>
-      if (master == null) {  // No positional argument was given
-        printUsageAndExit(1)
-      }
 
     case _ =>
       printUsageAndExit(1)