spring-projects / spring-projects/spring-modulith

EventListener in DelegatingEventExternalizer could not be created - Similar To Issue 973

Open
#1,170 10 comments 0 reactions 1 assignee View on GitHub

@odrotbohm is already working on this.

Since Apr 24, 2025.

meta: waiting for feedback
Dominant language
Java
Stars
1.2k
Forks
222
PR merge metrics
No merged PRs in 30d

Description

When using Spring Modulith 1.3.3 (starter + events-core + NATS Event) with Spring Boot 3.4.3, the auto-configured DelegatingEventExternalizer instance 'natsEventExternalizer' , continuously receiving EventListenerMethodProcessor can not find the @ApplicationModuleListener annotated method on, resulting in the following stacktrace:

org.springframework.beans.factory.BeanInitializationException: Failed to process @EventListener annotation on bean with name 'natsEventExternalizer': Need to invoke method 'externalize' declared on target class 'DelegatingEventExternalizer', but not found in any interface(s) of the exposed proxy type. Either pull the method up to an interface or switch to CGLIB proxies by enforcing proxy-target-class mode in your configuration.
	at org.springframework.context.event.EventListenerMethodProcessor.afterSingletonsInstantiated(EventListenerMethodProcessor.java:149) ~[spring-context-6.2.3.jar:6.2.3]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:1083) ~[spring-beans-6.2.3.jar:6.2.3]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:987) ~[spring-context-6.2.3.jar:6.2.3]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:627) ~[spring-context-6.2.3.jar:6.2.3]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.4.3.jar:3.4.3]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:752) ~[spring-boot-3.4.3.jar:3.4.3]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:439) ~[spring-boot-3.4.3.jar:3.4.3]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:318) ~[spring-boot-3.4.3.jar:3.4.3]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1361) ~[spring-boot-3.4.3.jar:3.4.3]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1350) ~[spring-boot-3.4.3.jar:3.4.3]
	at org.rockwell.publishermodulith.main(publishermodulith.java:14) ~[classes/:na]
Caused by: java.lang.IllegalStateException: Need to invoke method 'externalize' declared on target class 'DelegatingEventExternalizer', but not found in any interface(s) of the exposed proxy type. Either pull the method up to an interface or switch to CGLIB proxies by enforcing proxy-target-class mode in your configuration.
	at org.springframework.core.MethodIntrospector.selectInvocableMethod(MethodIntrospector.java:135) ~[spring-core-6.2.3.jar:6.2.3]
	at org.springframework.aop.support.AopUtils.selectInvocableMethod(AopUtils.java:150) ~[spring-aop-6.2.3.jar:6.2.3]
	at org.springframework.context.event.EventListenerMethodProcessor.processBean(EventListenerMethodProcessor.java:189) ~[spring-context-6.2.3.jar:6.2.3]
	at org.springframework.context.event.EventListenerMethodProcessor.afterSingletonsInstantiated(EventListenerMethodProcessor.java:145) ~[spring-context-6.2.3.jar:6.2.3]
	... 10 common frames omitted

Process finished with exit code 1

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Assessment

This issue has not been assessed yet.

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.