>
> I guess building twice in any way actually works around the JDK bug?
>
No, it's not a workaround. The issue is that we can't build
maven-glassfishbuild-extension and maven-glassfishbuild-plugin while
using the artifacts to build rest of v3 workspace in the same maven
reactor. So -Prelease-phase1 is introduced to build these artifacts in
v3/build submodule. Since you didn't build with -Prelease-phase1, the
artifacts were downloaded from the maven repository.
>
> So now it's safe to use the <mirrors> entry in my settings.xml?
>
> Is this version of Nexus going to cache *anything* I might access
> using maven?
>
>
> With these changes my build still fails, details in next message...
>
Are you still seeing build failures using setting.xml?