GWT import cannot be resolved (gwt-maven-plugin).

Question

I'm trying to clean install a GWT project with the gwt-maven-plugin. I'm running into the following issues several times:

Finding entry point classes
[ERROR] Errors in '.../core/impl/MyClass.java'
[ERROR] Line 23: The import org.codehaus.jackson.annotate.JsonIgnore cannot be resolved
[ERROR] Line 24: The import org.hibernate.envers cannot be resolved
[ERROR] Line 27: Audited cannot be resolved to a type
[ERROR] Line 102: JsonIgnore cannot be resolved to a type
[ERROR] Line 129: JsonIgnore cannot be resolved to a type

The problems are only with annotations.
The core project is a project that defines my data model. It is used on both the server and the client (gwt) side. Any way to make it work?

Answer 1

Because the classes which are compiler is complaining are unsupported by GWT's JRE emulation. You should use them on the server-side only. See GWT JRE Emulation Reference for more information.