Installation of libapache2-mod-mono hangs

[flipm0de]

Using the latest daily build of Ubuntu 14.4 either server or desktop image installation of this package using apt-get ends with a hang.

I followed the steps as documented here: https://help.ubuntu.com/community/ModMono
They work fine on Ubuntu 12.4 but on 14.4 (daily build as of 4/15/2014) the system hangs while installing the package.

Steps to reproduce:
1. sudo apt-get install libapache2-mod-mono
2. The dependances get installed and this package too.
3. The command hangs, Ctrl+C does not work.

Expected:
The command to finish gracefully

Actual:
The command hangs and the last message is:
 * Restarting web server apache2

[Joshua Tauberer (jt-occams)]

Ditto. Encountered this after upgrading to 14.04.

[Launchpad Janitor (janitor)]

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

[Rodney Edmondson (rodney-edmondson)]

Same problem as above on both server and desktop. Tried to reinstall libapache2-mod-mono on desktop terminal but received the following error message:

E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?

[flipm0de (vlad-dimitrov)]

4 months later -> nothing.

[TW.Bert (tw-bert-nl)]

Having the same issue. Using Ubuntu 14.04 LTS trusty tahr , libapache2-mod-mono_2.11+git20130708.6b73e85-4ubuntu1_amd64.deb .

@rodney-edmondson: if you do a `/etc/init.d/apache2 stop` you can remove or reinstall.

Does anyone know if it has any consequences? Do I need to fix anything afterwards?

[TW.Bert (tw-bert-nl)]

AH, found out something. I found myself in a perpertual loop of `dpkg --configure -a`.

If you have the same problem and it hangs, just execute in a different prompt:
/etc/init.d/apache2 stop
The postinst from the .deb will continue, and the install will complete succesfully.
This works in case of a hanging condition in `dpkg --configure -a` as well as a hanging condition with `apt-get install libapache2-mod-mono` (The first is Ctrl+C interruptable, the second isn't, but Ctrl+C does not solve the problem anyway).

Hope this helps, TW

[Csipak Attila (corphicks)]

The bug is also mentioned elsewhere, with a somewhat different workaround method:

https://askubuntu.com/questions/135547/how-do-i-set-up-mod-mono-on-11-10

(See comments under accepted answer.)

http://blog.xyzio.com/2014/02/05/libapache2-mod_mono-install-freezing-during-install-on-ubuntu-at-digital-ocean/

"The workaround for this is to open another session and restart/reload apache:

root@xyzio:/home/xyzio# service apache2 reload
root@xyzio:/home/xyzio# service apache2 restart"

Any opinions on which workaround is preferable (stop or reload+restart)?

[dyim42 (dyim42)]

Found another work around that doesn't need another shell. If you don't have apache installed yet, you just have to do it in this sequence.

apt-get install -y libapache2-mod-mono
apt-get install -y apache2

Breaking it up into 2 steps actually doesn't freeze up.