Why doesn't NetBeans IDE see the generated sources?

Question

I have a Maven-built web-app that uses JPA 2.0 at the back end. The JPA provider is EclipseLink 2.3.2.

When I build the project (and it deploys runs successfully) it bu

Answer 1

For me it worked after I added ${project.build.directory}/endorsed to the of the pom.xml, e.g.:

    1.8
    1.8
    ${project.build.directory}/endorsed
    UTF-8
    8.0

But I have no explanation why.