The output pom files generated by the flatten-maven-plugin(v 1.0.1) contains all the metadata elements I need to publish on OSSRH when <flattenMode>ossrh</flattenMode> is specified, or when individual fields are specified with <pomElements>. However, the flattened child poms in my project are missing one element required by OSSRH: the project <name>. The flattened parent pom does contain <name>.
My original issue is described in How to resolve parent pom dependency issue: Failed to read artifact descriptor; Could not find artifact?, which worked. The final workaround is described in a comment, but I'm wondering if this workaround is actually necessary (or, maybe it is even a bug, since it seems unlikely all the other metadata elements would be copied over without issue).