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Does the <import> command of the Spring bean container eliminate duplicate containers? For example, if bean container file A imports B and C and each these in turn import D, does Spring eliminate or ignore the duplicate D container?
It doesn’t eliminate duplicate “containers”, but it will eliminate duplicate bean definitions. So the beans in D will only be created once in the resulting bean factory. You’ll get a face full of warnings about it, though.
It’s something best avoided. One bean definition which has the same ID as another will “hide” that bean definition, regardless of whether or not the type and properties of that bean are the same. Which one gets “hidden” depends on the declaration order. It’s dangerous, and so Spring will warn you about it.