Fix print logs for NamingTraceEvent.

common/src/main/java/com/alibaba/nacos/common/notify/Event.java

@@ -27,11 +27,11 @@ import java.util.concurrent.atomic.AtomicLong;
  */
 @SuppressWarnings({"PMD.AbstractClassShouldStartWithAbstractNamingRule"})
 public abstract class Event implements Serializable {
-
+    
     private static final long serialVersionUID = -3731383194964997493L;
-
+    
     private static final AtomicLong SEQUENCE = new AtomicLong(0);
-
+    
     private final long sequence = SEQUENCE.getAndIncrement();
     
     /**
@@ -51,5 +51,15 @@ public abstract class Event implements Serializable {
     public String scope() {
         return null;
     }
+    
+    /**
+     * Whether is plugin event. If so, the event can be dropped when no publish and subscriber without any hint. Default
+     * false
+     *
+     * @return {@code true} if is plugin event, otherwise {@code false}
+     */
+    public boolean isPluginEvent() {
+        return false;
+    }
 }
 

common/src/main/java/com/alibaba/nacos/common/notify/NotifyCenter.java

@@ -301,6 +301,9 @@ public class NotifyCenter {
         if (publisher != null) {
             return publisher.publish(event);
         }
+        if (event.isPluginEvent()) {
+            return true;
+        }
         LOGGER.warn("There are no [{}] publishers for this event, please register", topic);
         return false;
     }

common/src/main/java/com/alibaba/nacos/common/trace/event/naming/NamingTraceEvent.java

@@ -31,4 +31,9 @@ public class NamingTraceEvent extends TraceEvent {
             String serviceNamespace, String serviceGroup, String name) {
         super(eventType, eventTime, serviceNamespace, serviceGroup, name);
     }
+    
+    @Override
+    public boolean isPluginEvent() {
+        return true;
+    }
 }

naming/src/test/java/com/alibaba/nacos/naming/core/v2/event/publisher/NamingEventPublisherTest.java

@@ -29,6 +29,7 @@ import org.mockito.junit.MockitoJUnitRunner;
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assert.assertThat;
+import static org.mockito.Mockito.atLeastOnce;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.verify;
 
@@ -92,7 +93,7 @@ public class NamingEventPublisherTest {
         }
         namingEventPublisher.addSubscriber(subscriber, TestEvent.class);
         namingEventPublisher.publish(testEvent);
-        verify(subscriber).onEvent(testEvent);
+        verify(subscriber, atLeastOnce()).onEvent(testEvent);
     }
     
     @Test