Spring's @Scheduled error : Only one AsyncAnnotationBeanPostProcessor may exist within the context

Question

I am trying Spring 3\'s @Scheduled annotation . Here is my configuration (app.xml) :

Answer 1

I had this problem when I copied applicationContext.xml and created new one called applicationContextAdditional.xml. I didn't try to find the reason, but both contained namespace

    ...

when I removed the namespace from the second one my problem was solved. Maybe it helps someone.