MCVE for StackOverflow issue #64718434

To run, either launch the AspectMcveApplication or invoke gradlew :bootRun.

Check stdout, you should see You should never see this message! printed, which indicates the problem.

If you want to repeat the triggering the aspect, simply use curl http://localhost:8080/foo.

The problem only occurs when using Spring AOP. The program automatically detects if AspectJ via LTW (load-time weaving) is used instead.

You can use AspectJ LTW by adding -javaagent:/path/to/aspectjweaver.jar -javaagent:/path/to/spring-instrument.jar to the command line. Then the message You should never see this message! disappears.