Cron Daemon <root@aluminium.wikimedia.org> 7:25 AM (1 hour ago) to root /etc/cron.daily/logrotate: error: error opening /var/log/squid3/access.log.1.gz: No such file or directory run-parts: /etc/cron.daily/logrotate exited with return code 1
In this case access.log.1.gz was present on disk and its content was bigger than zero bytes. I had to manually gzip it.