When a large number of search domains are configured in a *.network file the auto-generated /run/systemd/resolve/resolv.conf file is spammed with commentary for each and every dropped search term.
# This file is managed by systemd-resolved(8). Do not edit.
#
# Third party programs must not access this file directly, but
# only through the symlink at /etc/resolv.conf. To manage
# resolv.conf(5) in a different way, replace the symlink by a
# static file or a different symlink.
nameserver 1.2.3.4
nameserver 2.3.4.5
search this that other me you them # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored. # Too many search domains configured, remaining ones ignored. # Total length of all search domains is too long, remaining ones ignored.
Reproduced in test cases, and fix+tests sent upstream: https:/