I think it comes down to the fact that pip had trouble installing
something when it was setting itself up to push the logs. Since
that failed, it didn't figure out the logs location and the
description-setter step failed:

16:44:30 [description-setter] Could not determine description.

Looks like the part we care about (booting your distribution and
making some sanity checks) was ok, so you can ignore. But, if
you want to be safe just give the comment "recheck" on your gerrit.

JamO