if a VM is killed soon after creating it, the lantorrent process doesn't exit. Doing a ps aux | grep lantorrent on the VMM shows many lantorrent processes still running, many lines are written to lantorrent.daemon.log.
After restarting Nimbus lantorrents continues to retry transfers and fails.
A work around is to stop nimbus, delete the lantorrent directory, and re-install lantorrent from source.
patch for GH-39