Maven missing transitive dependency?

I'm not sure I understood the question... Anyway, there is indeed something wrong with the db4o:db4o dependency of the datanucleus-db4o artifact: it is not available in Maven central nor in the DataNucleus repository . I don't understand how users are supposed to use the datanucleus-db4o artifact.

The required file is not in the maven repositories, but it is in the datanucleus zip file (that one with all dependencies). Look into the /deps folder.

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