Defining the same Spring bean twice with same name

Question

Is having two definition for a bean (with same name and class) valid in Spring IOC ?

I am having two bean definition files included in web.xml. See the sample below.

Answer 1

It's valid, but you'll find that one bean is overridden by the other. You'll see this in the logs as

Overriding bean definition for...

This behaviour allows you to override previously supplied bean definitions. It affects the static assembly of your app, and doesn't relate to threading/clustering as suggested in your question.

Note that the DefaultListableBeanFactory allows you to configure this behaviour via setAllowBeanDefinitionOverriding()