We have a tool that will scan a web archive and wrap each filter, listener, and servlet in order to provide customized session support in a "portable" fashion.  This has been working fine using pre-annotation web applications.

We've recently began updating our framework to support the latest Servlet features and have run into an issue with @PostConstruct (probably @PreDestroy as well, but I haven't verified it yet) being called twice.  In this case, there is a Servlet included in a web-fragment jar that has @PostConstruct defined.  The web-fragment.xml doesn't reference this servlet, but instead references a wrapper around it.  When the init() method is called on the wrapper, it calls ServletContext.createServlet() with the wrapped servlet class.  After this call returns, the counter in the @PostConstruct implementation has been invoked twice. 

I've attached (in call order) the call stacks I captured from Intellij. 

See the attached test case: wf-repro.tar.gz