As in the past, some JDK API's also appear in Java EE with additional methods and classes. In the past, these were handled using endorsed jar files. This feature is gone in JDK9.
This needs to be worked around by a combination of modular jar files in upgrademodulepath and module path.

The current work-around is to use the attached jar files as follows.
javax.enterprise.cdi.api.jar javax.interceptor.javax.interceptor.api.jar are needed in module path.
java.transaction.jar javax.annotation-api-1.2.jar are needed in upgrademodulepath.

We need an official solution with official jar files.