The log4j maven-metadata.xml hosted at ibiblio is missing the latest two versions, 1.1.14 and 1.1.15. It becomes a problem for me as an Ivy user, too, since Ivy 2.0 adds the ability to use maven metadata to list available versions.
Fortunately I have a Nexus repository as the aggregator/proxy to all the external repositories. Brian from the Nexus IRC room pointed me to this solution/workaround: add the fixed maven-metadata.xml to a repo hosted by Nexus – e.g., the “3rd Party” repo coming out of box in Nexus. Then create a group to aggregate the 3rd Party and the public Ibiblio repos. The “virtual” group repo will automatically create a merged maven-metadata.xml on the fly whenever it is requested.
And it works like a charm. Thanks, Brian!