[php-maint] Bug#868880: libapache2-mod-php7.0: installation failure, unnecessarily hard to debug

[Bernd Zeimetz]

Package: libapache2-mod-php7.0
Version: 7.0.19-1
Severity: important

Hi,

the installation of libapache2-mod-php7.0 failed on one of our systems with

Setting up libapache2-mod-php7.0 (7.0.19-1) ...
apache2_switch_mpm prefork: No action required
dpkg: error processing package libapache2-mod-php7.0 (--configure):
  subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
  libapache2-mod-php7.0
E: Sub-process /usr/bin/dpkg returned an error code (1)


which is a rather useless error message - as there is none.
Adding a set -x to the postinst script showed, that actually a2enmod failed:

+ APACHE2_NEED_ACTION=1
+ a2enmod -m -q php7.0
+ return 1
+ exit 1
dpkg: error processing package libapache2-mod-php7.0 (--configure):
  subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
  libapache2-mod-php7.0


And I had to run a2enmod manually to figure out what the reason for this 
issue was:

# a2enmod php7.0
Considering dependency mpm_prefork for php7.0:
Considering conflict mpm_event for mpm_prefork:
ERROR: Module mpm_event is enabled - cannot proceed due to conflicts. It 
needs to be disabled first!
Considering conflict mpm_worker for mpm_prefork:
ERROR: Could not enable dependency mpm_prefork for php7.0, aborting


So I'm wondering:

- why is there not a proper error message in postinst, stating that the 
wrong mpm is configured for php?
- or: should a2enmod print the error message, although it was called 
with -q?


The current state is rather frustrating.

Thanks,

Bernd


-- 
Mit freundlichen Grüßen


Bernd Zeimetz
Systems Engineer
Debian Developer

conova communications GmbH
Web    | http://www.conova.com/
E-Mail | b.zeimetz at conova.com

Zentrale Salzburg
Karolingerstraße 36A
5020 Salzburg

Tel | +43 (0) 662 22 00 - 313
Fax | +43 (0) 662 22 00 - 209

Es gelten die Allgemeinen Geschäftsbedingungen der
conova communications GmbH, http://www.conova.com/de/agb/
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