add exposeInvocationInterceptor exception msg

  • because ExposeInvocationInterceptor use ThreadLocal to expose MethodInvocation in current Thread, thus ExposeInvocationInterceptor.currentInvocation() that invoking in other thread will throw Exception.
  • some spring users face the problem cann't know the reason. for example: https://stackoverflow.com/questions/7147031/spring-aspect-fails-when-join-point-is-invoked-in-new-thread?r=SearchResults

Thank you.

Comment From: sbrannen

This has been merged into master in 132805133d and refined in 141dae6437.

Thanks