diff --git a/dubbo-bootstrap/src/main/java/org/apache/dubbo/bootstrap/DubboBootstrap.java b/dubbo-bootstrap/src/main/java/org/apache/dubbo/bootstrap/DubboBootstrap.java
index b7df466335e..437024d9990 100644
--- a/dubbo-bootstrap/src/main/java/org/apache/dubbo/bootstrap/DubboBootstrap.java
+++ b/dubbo-bootstrap/src/main/java/org/apache/dubbo/bootstrap/DubboBootstrap.java
@@ -63,10 +63,10 @@
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.Set;
 import java.util.SortedSet;
-import java.util.concurrent.ConcurrentSkipListSet;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.locks.Condition;
@@ -75,6 +75,7 @@
 import java.util.function.Consumer;
 
 import static java.util.Arrays.asList;
+import static java.util.Collections.sort;
 import static java.util.concurrent.Executors.newSingleThreadExecutor;
 import static org.apache.dubbo.common.config.ConfigurationUtils.parseProperties;
 import static org.apache.dubbo.common.config.configcenter.DynamicConfiguration.getDynamicConfiguration;
@@ -140,7 +141,7 @@ public class DubboBootstrap extends GenericEventListener implements Lifecycle {
 
     private volatile MetadataServiceExporter metadataServiceExporter;
 
-    private SortedSet<ServiceDiscovery> serviceDiscoveries = new ConcurrentSkipListSet<>();
+    private volatile List<ServiceDiscovery> serviceDiscoveries = new LinkedList<>();
 
     public DubboBootstrap() {
         DubboShutdownHook.getDubboShutdownHook().register();
@@ -153,7 +154,10 @@ public DubboBootstrap() {
      * @see {@linkplan org.apache.dubbo.registry.client.EventPublishingServiceDiscovery}
      */
     public void onServiceDiscoveryInitializing(ServiceDiscoveryInitializingEvent event) {
-        serviceDiscoveries.add(event.getSource());
+        executeMutually(() -> {
+            serviceDiscoveries.add(event.getSource());
+            sort(serviceDiscoveries);
+        });
     }
 
     /**
diff --git a/dubbo-bootstrap/src/test/java/org/apache/dubbo/bootstrap/DubboServiceConsumerBootstrap.java b/dubbo-bootstrap/src/test/java/org/apache/dubbo/bootstrap/DubboServiceConsumerBootstrap.java
index bf1fe0ae5f8..96a865f3f61 100644
--- a/dubbo-bootstrap/src/test/java/org/apache/dubbo/bootstrap/DubboServiceConsumerBootstrap.java
+++ b/dubbo-bootstrap/src/test/java/org/apache/dubbo/bootstrap/DubboServiceConsumerBootstrap.java
@@ -35,6 +35,7 @@ public static void main(String[] args) throws Exception {
                 .registry("zookeeper", builder -> builder.address("zookeeper://127.0.0.1:2181?registry.type=service&subscribed.services=dubbo-provider-demo"))
 //                .metadataReport(new MetadataReportConfig("zookeeper://127.0.0.1:2181"))
                 // Nacos
+                .registry("nacos", builder -> builder.address("nacos://127.0.0.1:8848?registry.type=service&subscribed.services=dubbo-provider-demo"))
 //                .registry("consul", builder -> builder.address("consul://127.0.0.1:8500?registry.type=service&subscribed.services=dubbo-provider-demo").group("namespace1"))
                 .reference("echo", builder -> builder.interfaceClass(EchoService.class).protocol("dubbo"))
                 .reference("user", builder -> builder.interfaceClass(UserService.class).protocol("rest"))
diff --git a/dubbo-bootstrap/src/test/java/org/apache/dubbo/bootstrap/DubboServiceProvider2Bootstrap.java b/dubbo-bootstrap/src/test/java/org/apache/dubbo/bootstrap/DubboServiceProvider2Bootstrap.java
index 83ea7a12ffd..15bb814c2ba 100644
--- a/dubbo-bootstrap/src/test/java/org/apache/dubbo/bootstrap/DubboServiceProvider2Bootstrap.java
+++ b/dubbo-bootstrap/src/test/java/org/apache/dubbo/bootstrap/DubboServiceProvider2Bootstrap.java
@@ -32,7 +32,7 @@ public static void main(String[] args) {
                 // Zookeeper in service registry type
                 .registry("zookeeper", builder -> builder.address("zookeeper://127.0.0.1:2181?registry.type=service"))
                 // Nacos
-//                .registry("nacos", builder -> builder.address("nacos://127.0.0.1:8848?registry.type=service"))
+                .registry("nacos", builder -> builder.address("nacos://127.0.0.1:8848?registry.type=service"))
 //                .registry(RegistryBuilder.newBuilder().address("etcd3://127.0.0.1:2379?registry.type=service").build())
                 .protocol("dubbo", builder -> builder.port(20885).name("dubbo"))
                 .protocol("rest", builder -> builder.port(9090).name("rest"))