Why there were two consumers listening

I found out why my .war project had two consumers listening to the queue: My application logic was allowing the line

ctx = new ClassPathXmlApplicationContext("applicationContext.xml");

to be called twice, which instantiated the listener the second time. I fixed the guard condition, and now when I deploy I only have one consumer listening to my queue, as I expected should be the case!

(See my self-answering thread on the Spring forum.)

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