Hi,

attempting to install this package...

   # apt-get install collectd

   Reading package lists... Done
   Building dependency tree
   Reading state information... Done
   The following extra packages will be installed:
     collectd-core libdbi1 librrd4
   Suggested packages:
     collectd-dev librrds-perl libconfig-general-perl apcupsd bind9
hddtemp ipvsadm lm-sensors mbmon
     memcached nginx nut openvpn olsrd pdns-server postgresql time-daemon
   Recommended packages:
     libesmtp6 liblvm2app2.2 libmodbus5 libopenipmi0 liboping0
libowcapi-2.9-8 libpcap0.8 libperl5.20
     libpq5 libprotobuf-c1 librabbitmq1 libsnmp30 libtokyotyrant3
libupsclient4 libvirt0
     default-jre-headless rrdtool
   The following NEW packages will be installed:
     collectd collectd-core libdbi1 librrd4
   0 upgraded, 4 newly installed, 0 to remove and 0 not upgraded.
   Need to get 1119 kB of archives.
   After this operation, 3941 kB of additional disk space will be used.
   Do you want to continue? [Y/n]
   Get:1 http://ftp.it.debian.org/debian/ jessie/main collectd-core
amd64 5.4.1-6 [777 kB]
   Get:2 http://ftp.it.debian.org/debian/ jessie/main libdbi1 amd64
0.9.0-4 [32.3 kB]
   Get:3 http://ftp.it.debian.org/debian/ jessie/main librrd4 amd64
1.4.8-1.2 [223 kB]
   Get:4 http://ftp.it.debian.org/debian/ jessie/main collectd amd64
5.4.1-6 [86.7 kB]
   Fetched 1119 kB in 2s (490 kB/s)
   Preconfiguring packages ...
   Selecting previously unselected package collectd-core.
   (Reading database ... 146134 files and directories currently installed.)
   Preparing to unpack .../collectd-core_5.4.1-6_amd64.deb ...
   Unpacking collectd-core (5.4.1-6) ...
   Selecting previously unselected package libdbi1:amd64.
   Preparing to unpack .../libdbi1_0.9.0-4_amd64.deb ...
   Unpacking libdbi1:amd64 (0.9.0-4) ...
   Selecting previously unselected package librrd4.
   Preparing to unpack .../librrd4_1.4.8-1.2_amd64.deb ...
   Unpacking librrd4 (1.4.8-1.2) ...
   Selecting previously unselected package collectd.
   Preparing to unpack .../collectd_5.4.1-6_amd64.deb ...
   Unpacking collectd (5.4.1-6) ...
   Processing triggers for man-db (2.7.0.2-5) ...
   Setting up collectd-core (5.4.1-6) ...
   Setting up libdbi1:amd64 (0.9.0-4) ...
   Setting up librrd4 (1.4.8-1.2) ...
   Setting up collectd (5.4.1-6) ...
   Job for collectd.service failed. See 'systemctl status
collectd.service' and 'journalctl -xn' for details.
   invoke-rc.d: initscript collectd, action "restart" failed.
   dpkg: error processing package collectd (--configure):
   subprocess installed post-installation script returned error exit
status 1
   Processing triggers for libc-bin (2.19-15) ...
   Errors were encountered while processing:
   collectd
   E: Sub-process /usr/bin/dpkg returned an error code (1)

   # systemctl -l status collectd.service

   ● collectd.service - LSB: manage the statistics collection daemon
     Loaded: loaded (/etc/init.d/collectd)
     Active: failed (Result: exit-code) since dom 2015-03-01 10:26:49
CET; 2min 13s ago
     Process: 6119 ExecStop=/etc/init.d/collectd stop (code=exited,
status=0/SUCCESS)
     Process: 6127 ExecStart=/etc/init.d/collectd start (code=exited,
status=1/FAILURE)

     mar 01 10:26:49 s3v3land collectd[6130]: Looking up "s3v3land"
failed. You have set the "FQDNLookup" option,
     but I cannot resolve my hostname to a fully qualified domain name.
Please fix the network configuration.
     mar 01 10:26:49 s3v3land collectd[6127]: Starting statistics
collection and monitoring daemon: collectd
     not starting, configuration error failed!
     mar 01 10:26:49 s3v3land systemd[1]: collectd.service: control
process exited, code=exited status=1
     mar 01 10:26:49 s3v3land systemd[1]: Failed to start LSB: manage
the statistics collection daemon.
     mar 01 10:26:49 s3v3land systemd[1]: Unit collectd.service entered
failed state.

The error occurs if /etc/hosts hasn't FQDN domain name:

     127.0.0.1       localhost
     192.168.1.3     s3v3land.FOO

     # The following lines are desirable for IPv6 capable hosts
     ::1     localhost ip6-localhost ip6-loopback
     ff02::1 ip6-allnodes
     ff02::2 ip6-allrouters

After removing "FOO" from /etc/hosts file, the problem disappears and
package installation ends fine.

Can you provide some warnings regarding incorrect syntax in "etc/hosts"
but, despite that, allowing a normal installation of the package?

Thanks for reading and for your job.

forwarded 779483 collectd@verplant.org
thanks

Hi,
[…]

Thanks for reporting this. By default, the Debian package configuration
uses 'FQDNLookup true' and I think it makes sense to abort if the lookup
fails. However, I think we can make that optional by allowing a third
value (besides "true" and "false") like "allow-fallback" or something
which I could then use in the default package configuration.

With this email, I forwarded the issue to the upstream mailing list for
further comments.

Cheers,
Sebastian

Hi!
Do yoy have any news about this issue?

After more than two years the error message is slightly different:

 The following NEW packages will be installed:
 collectd collectd-core
 0 upgraded, 2 newly installed, 0 to remove and 1 not upgraded.
 Need to get 0 B/1106 kB of archives.
 After this operation, 4135 kB of additional disk space will be used.
 Do you want to continue? [Y/n]
 Preconfiguring packages ...
 Selecting previously unselected package collectd-core.
 (Reading database ... 173831 files and directories currently installed.)
 Preparing to unpack .../collectd-core_5.7.1-1.1_amd64.deb ...
 Unpacking collectd-core (5.7.1-1.1) ...
 Selecting previously unselected package collectd.
 Preparing to unpack .../collectd_5.7.1-1.1_amd64.deb ...
 Unpacking collectd (5.7.1-1.1) ...
 Setting up collectd-core (5.7.1-1.1) ...
 Created symlink /etc/systemd/system/multi-user.target.wants/collectd.service ->
 /lib/systemd/system/collectd.service.
 Processing triggers for systemd (232-19) ...
 Processing triggers for man-db (2.7.6.1-2) ...
 Setting up collectd (5.7.1-1.1) ...
 Job for collectd.service failed because the control process exited with error code.
 See "systemctl status collectd.service" and "journalctl -xe" for details.
 invoke-rc.d: initscript collectd, action "restart" failed.
 * collectd.service - Statistics collection and monitoring daemon
 Loaded: loaded (/lib/systemd/system/collectd.service; enabled; vendor preset:
 enabled)
 Active: activating (auto-restart) (Result: exit-code) since Sat 2017-03-25
 10:35:21 CET; 8ms ago
 Docs: man:collectd(1)
 man:collectd.conf(5)
https://collectd.org
 Process: 20181 ExecStartPre=/usr/sbin/collectd -t (code=exited, status=1/FAILURE)
 dpkg: error processing package collectd (--configure):
 subprocess installed post-installation script returned error exit status 1
 Errors were encountered while processing:
 collectd
 E: Sub-process /usr/bin/dpkg returned an error code (1)

but the result remains the same (uninstallable package) :(

I think that this issue violates the Debian Policy (section 6.3), therefore I raise
the severity of this bug to "serious" accordingly.
Feel free to downgrade the bug severity as appropriate.

Thanks.

Hi again.

Uhm, something gone wrong...

After long time and no user/maintainer/upstreamer reactions, i guess
this issue is not important at all. I set the severity to "normal".

Thanks for your work.

Kind regards and happy XMas!