Per the resolution of #ReflectionWithoutReadability [1], the core reflection APIs in the java.lang.reflect package assumes that any module that contains code that invokes a reflective operation can read the module that defines the types that are the subject of that operation.

The change in jdk9/jaxws implementation [2] has to be ported to standalone JAX-* code. Modules::ensureReadable has been removed.

[1] http://openjdk.java.net/projects/jigsaw/spec/issues/#ReflectionWithoutReadability
[2] http://hg.openjdk.java.net/jigsaw/jake/jaxws/rev/1bb1addef965