lastupdate is not showing in maven-metadata.xml

Answer 1

I'm not familiar with this aspect of Ivy, but there's potential that it's a bug in Ivy that doesn't write the field.

One potential way to correct this is to turn on Archiva's automated metadata correction. Try enabling the metadata-updater consumer in the Consumers of Known Content section at the bottom of the Repository Scanning admin page, then deploy the artifact again.

More information is available here: http://archiva.apache.org/docs/1.3/adminguide/consumers.html