Cannot activate the module.

[mini13i]

root@localUbuntu14:~# a2enmod auth_memcookie
Enabling module auth_memcookie.
To activate the new configuration, you need to run:
  service apache2 restart
root@localUbuntu14:~# service apache2 restart
 * Restarting web server apache2 [fail]
 * The apache2 configtest failed.
Output of config test was:
apache2: Syntax error on line 140 of /etc/apache2/apache2.conf: Syntax error on line 1 of /etc/apache2/mods-enabled/auth_memcookie.load: Cannot load /usr/lib/apache2/modules/mod_auth_memcookie.so into server: /usr/lib/libmemcache.so.0: undefined symbol: mcm_buf_len
Action 'configtest' failed.
The Apache error log may have more information.

root@localUbuntu14:~# tail /var/log/apache2/error.log
[Wed Jun 03 08:55:37.009141 2015] [mpm_event:notice] [pid 40404:tid 140517712578432] AH00489: Apache/2.4.7 (Ubuntu) mod_fastcgi/mod_fastcgi-SNAP-0910052141 configured -- resuming normal operations
[Wed Jun 03 08:55:37.009264 2015] [core:notice] [pid 40404:tid 140517712578432] AH00094: Command line: '/usr/sbin/apache2'
[Wed Jun 03 08:55:37.013410 2015] [:notice] [pid 49330:tid 140517712578432] FastCGI: process manager initialized (pid 49330)
[Wed Jun 03 10:50:10.690850 2015] [mpm_event:notice] [pid 40404:tid 140517712578432] AH00491: caught SIGTERM, shutting down

root@localUbuntu14:~# dpkg -l libapache2-mod-auth-memcookie
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-========================-=================-=================-=====================================================
ii libapache2-mod-auth-memc 1.0.2-8 amd64 Apache2 authentication and authorization module.

root@localUbuntu14:~# lsb_release -rd
Description: Ubuntu 14.04.2 LTS
Release: 14.04

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: libapache2-mod-auth-memcookie 1.0.2-8
ProcVersionSignature: Ubuntu 3.16.0-38.52~14.04.1-generic 3.16.7-ckt10
Uname: Linux 3.16.0-38-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
Date: Wed Jun 3 10:57:31 2015
Dependencies:
 gcc-4.9-base 4.9.1-0ubuntu1
 libc6 2.19-0ubuntu6.6
 libgcc1 1:4.9.1-0ubuntu1
 libmemcache0 1.4.0.rc2-1ubuntu1
 multiarch-support 2.19-0ubuntu6.6
InstallationDate: Installed on 2015-04-23 (40 days ago)
InstallationMedia: Ubuntu-Server 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
ProcEnviron:
 LANGUAGE=en_US:en
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: libapache2-mod-auth-memcookie
UpgradeStatus: No upgrade log present (probably fresh install)

[mini13i (mini13i)]

This problem seems to be repaired at:
http://pietercvdmlinux.blogspot.jp/2012/07/building-modauthmemcookie-on-fedora.html

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Mathieu CARBONNEAUX (mcarbonneaux)]

this bug is related to old libmemcache librarie, the package need to be update to the last version of the module that support the new libmemcached and apache 2.4 natively.

[- (goebelch-b)]

same problem with Ubuntu 16.04.2 LTS

[Harald Hannelius (harald-arcada)]

Just upgraded to 16.04.3 LTS and got bitten by this too. Any news on this?

[Harald Hannelius (harald-arcada)]

https://bugs.launchpad.net/ubuntu/+source/libmemcache/+bug/1314679 Seems to be the same bug