Comment 0 for bug 1644498

Periodically I get emails from a machine with the subject:

Cron <root@Jenkins> if [ -x /etc/munin/plugins/apt_all ]; then /etc/munin/plugins/apt_all update 7200 12 >/dev/null; elif [ -x /etc/munin/plugins/apt ]; then /etc/munin/plugins/apt update 7200 12 >/dev/null; fi

And a body of:

AppStream cache update completed, but some metadata was ignored due to errors.

I have a machine monitored by Munin. One of the plugins used on that machine is /etc/munin/plugins/apt which periodically counts the number of packets that can be upgraded. This is achieved by a crontab entry installed from the package which looks like this:

#
# cron-jobs for munin-node
#

MAILTO=root

# If the APT plugin is enabled, update packages databases approx. once
# an hour (12 invokations an hour, 1 in 12 chance that the update will
# happen), but ensure that there will never be more than two hour (7200
# seconds) interval between updates..
*/5 * * * * root if [ -x /etc/munin/plugins/apt_all ]; then /etc/munin/plugins/apt_all update 7200 12 >/dev/null; elif [ -x /etc/munin/plugins/apt ]; then /etc/munin/plugins/apt update 7200 12 >/dev/null; fi

For many months everything has been running smoothly. On the 23rd November 2016 I started getting the "AppStream cache update completed, but some metadata was ignored due to errors." messages at a rate of about ten a day.

I did a quick Google search which turned up a handful of bugs from earlier this year, such as
Bug1575248. That is marked as Fixed Released though, so I am raising this new bug.

If there are any further diagnostic details I can provide, please let me know.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: appstream 0.9.4-1ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-47.68-generic 4.4.24
Uname: Linux 4.4.0-47-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Thu Nov 24 09:57:18 2016
InstallationDate: Installed on 2013-05-08 (1295 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130508)
JournalErrors:
 -- Logs begin at Wed 2016-11-23 19:25:01 GMT, end at Thu 2016-11-24 09:57:24 GMT. --
 Nov 24 02:22:17 hostname systemd-tmpfiles[27330]: [/usr/lib/tmpfiles.d/var.conf:14] Duplicate line for path "/var/log", ignoring.
ProcEnviron:
 TERM=xterm-256color
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 LANGUAGE=en_GB:en
SourcePackage: appstream
UpgradeStatus: Upgraded to xenial on 2016-08-24 (91 days ago)