diff --git a/pom.xml b/pom.xml
index 08629915..e96ed354 100644
--- a/pom.xml
+++ b/pom.xml
@@ -349,6 +349,31 @@
                     <reuseForks>false</reuseForks>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>flatten-maven-plugin</artifactId>
+                <version>${flatten-maven-plugin.version}</version>
+                <configuration>
+                    <updatePomFile>true</updatePomFile>
+                    <flattenMode>resolveCiFriendliesOnly</flattenMode>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>flatten</id>
+                        <phase>process-resources</phase>
+                        <goals>
+                            <goal>flatten</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>flatten.clean</id>
+                        <phase>clean</phase>
+                        <goals>
+                            <goal>clean</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>
 
@@ -406,32 +431,6 @@
                             </execution>
                         </executions>
                     </plugin>
-
-                    <plugin>
-                        <groupId>org.codehaus.mojo</groupId>
-                        <artifactId>flatten-maven-plugin</artifactId>
-                        <version>${flatten-maven-plugin.version}</version>
-                        <configuration>
-                            <updatePomFile>true</updatePomFile>
-                            <flattenMode>resolveCiFriendliesOnly</flattenMode>
-                        </configuration>
-                        <executions>
-                            <execution>
-                                <id>flatten</id>
-                                <phase>process-resources</phase>
-                                <goals>
-                                    <goal>flatten</goal>
-                                </goals>
-                            </execution>
-                            <execution>
-                                <id>flatten.clean</id>
-                                <phase>clean</phase>
-                                <goals>
-                                    <goal>clean</goal>
-                                </goals>
-                            </execution>
-                        </executions>
-                    </plugin>
                 </plugins>
             </build>
 
diff --git a/spring-cloud-alibaba-starters/spring-cloud-starter-dubbo/src/main/java/com/alibaba/cloud/dubbo/autoconfigure/DubboServiceRegistrationNonWebApplicationAutoConfiguration.java b/spring-cloud-alibaba-starters/spring-cloud-starter-dubbo/src/main/java/com/alibaba/cloud/dubbo/autoconfigure/DubboServiceRegistrationNonWebApplicationAutoConfiguration.java
index a9b8c33d..414e7a0a 100644
--- a/spring-cloud-alibaba-starters/spring-cloud-starter-dubbo/src/main/java/com/alibaba/cloud/dubbo/autoconfigure/DubboServiceRegistrationNonWebApplicationAutoConfiguration.java
+++ b/spring-cloud-alibaba-starters/spring-cloud-starter-dubbo/src/main/java/com/alibaba/cloud/dubbo/autoconfigure/DubboServiceRegistrationNonWebApplicationAutoConfiguration.java
@@ -76,12 +76,17 @@ public class DubboServiceRegistrationNonWebApplicationAutoConfiguration {
 
 	@Around("execution(* org.springframework.cloud.client.serviceregistry.Registration.getPort())")
 	public Object getPort(ProceedingJoinPoint pjp) throws Throwable {
+		/**
+		 * move setServerPort from onApplicationStarted() to here for this issue :
+		 * https://github.com/alibaba/spring-cloud-alibaba/issues/1383
+		 * @author <a href="mailto:chenxilzx1@gmail.com">theonefx</a>
+		 */
+		setServerPort();
 		return serverPort != null ? serverPort : pjp.proceed();
 	}
 
 	@EventListener(ApplicationStartedEvent.class)
 	public void onApplicationStarted() {
-		setServerPort();
 		register();
 	}
 
@@ -99,18 +104,22 @@ public class DubboServiceRegistrationNonWebApplicationAutoConfiguration {
 	 */
 	private void setServerPort() {
 		if (serverPort == null) {
-			for (List<URL> urls : repository.getAllExportedUrls().values()) {
-				urls.stream()
-						.filter(url -> REST_PROTOCOL.equalsIgnoreCase(url.getProtocol()))
-						.findFirst().ifPresent(url -> {
-							serverPort = url.getPort();
-						});
-
-				// If REST protocol is not present, use any applied port.
+			synchronized (DubboServiceRegistrationNonWebApplicationAutoConfiguration.class) {
 				if (serverPort == null) {
-					urls.stream().findAny().ifPresent(url -> {
-						serverPort = url.getPort();
-					});
+					for (List<URL> urls : repository.getAllExportedUrls().values()) {
+						urls.stream().filter(
+								url -> REST_PROTOCOL.equalsIgnoreCase(url.getProtocol()))
+								.findFirst().ifPresent(url -> {
+									serverPort = url.getPort();
+								});
+
+						// If REST protocol is not present, use any applied port.
+						if (serverPort == null) {
+							urls.stream().findAny().ifPresent(url -> {
+								serverPort = url.getPort();
+							});
+						}
+					}
 				}
 			}
 		}
@@ -126,6 +135,7 @@ public class DubboServiceRegistrationNonWebApplicationAutoConfiguration {
 		@EventListener(ServiceInstancePreRegisteredEvent.class)
 		public void onServiceInstancePreRegistered(
 				ServiceInstancePreRegisteredEvent event) {
+			setServerPort();
 			registration.setPort(serverPort);
 		}