Steps to reproduce:
1. create EAR (with application.xml)
2. create web project 1 and add it to EAR
3. deploy EAR on EAP-5.0.GA (4.3 is not affected by this issue)
4. Create web project 2 add add it to EAR

You should get same exception as attached in server.log

Adapter is then in bad state, clicking on Full Republish on EAR in server view does not even help to get project 2 deployed. The only way is to remove and add EAR to server