diff --git a/event/src/main/java/com/zfoo/event/manager/EventBus.java b/event/src/main/java/com/zfoo/event/manager/EventBus.java
index b9dce498..b9b09c79 100644
--- a/event/src/main/java/com/zfoo/event/manager/EventBus.java
+++ b/event/src/main/java/com/zfoo/event/manager/EventBus.java
@@ -110,6 +110,7 @@ public abstract class EventBus {
                     execute(event.executorHash(), () -> doReceiver(receiver, event));
                     break;
                 case VirtualThread:
+                    logger.error("waiting for java 21 virtual thread");
                     break;
             }
         }