# ansible.builtin.service hangs **URL:** \ **Category:** Ansible Project\ **Created:** [October 13, 2022, 9:19am UTC](https://forum.ansible.com/t/ansible-builtin-service-hangs/37220 "2022-10-13T09:19:11Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Axel\_Rau](https://avatars.discourse-cdn.com/v4/letter/a/ad7895/32.png) [@Axel\_Rau](https://forum.ansible.com/u/Axel_Rau)\ **Post date:** [October 13, 2022, 9:19am UTC](https://forum.ansible.com/t/ansible-builtin-service-hangs/37220/1 "2022-10-13T09:19:11Z")
The last task below does not complete. - - - - name: Enable/Disable servers   ansible.builtin.service:     name: '{{ ena\_item }}'     enabled: '{{ i\_am\_master }}'   loop\_control:     loop\_var: ena\_item   loop:     - mailman     - uwsgi     - nginx - name: Start uwsgi if i\_am\_master   ansible.builtin.service:     name: uwsgi     state: started   when: i\_am\_master - name: Stop servers if not if i\_am\_master   ansible.builtin.service:     name: '{{ ena\_item }}'     state: stopped   loop\_control:     loop\_var: ena\_item   loop:     - mailman     - uwsgi     - nginx   when: 'not i\_am\_master' - - - How can I debug this? What may be the reason? OS is FreeBSD 13.1 Axel ---
**Author:** ![utoddl](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/utoddl/32/249_2.png) [@utoddl](https://forum.ansible.com/u/utoddl)\ **Post date:** [October 13, 2022, 10:37am UTC](https://forum.ansible.com/t/ansible-builtin-service-hangs/37220/2 "2022-10-13T10:37:05Z")
Your last “when:” is wrong. when: ‘not i\_am\_master’ A quoted when condition that contains no jinja mustaches is just a string, which is always true. You want when: not i\_am\_master ---
**Author:** ![Axel\_Rau](https://avatars.discourse-cdn.com/v4/letter/a/ad7895/32.png) [@Axel\_Rau](https://forum.ansible.com/u/Axel_Rau)\ **Post date:** [October 13, 2022, 5:24pm UTC](https://forum.ansible.com/t/ansible-builtin-service-hangs/37220/3 "2022-10-13T17:24:14Z")
Applying your patch does not solve my problem. It still hangs. )-( > Your last “when:” is wrong. > > when: ‘not i\_am\_master’ > > A quoted when condition that contains no jinja mustaches is just a string, which is always true. You want > > when: not i\_am\_master I’m missing a clear definition here: Where ends a simple expression and where start jinja ‚mustaches‘ ? Some examples: when: x \> a or (y and z) when: " DEBUG is defined " when: “i.replication\_type == ‘p\_dynamic’” when: “(i\_am\_master is defined and i\_am\_master) or i.replication\_type == ‘l\_master’” when: “sdt.stat.exists and (i.replication\_type.startswith(‘l’) or i.replication\_type == ‘p\_master’)” Any clear rule welcome. Axel ---
**Author:** ![system](https://us1.discourse-cdn.com/ansible/original/1X/1882d9a01da5d8996a862359b0913cc568a39b84.svg) [@system](https://forum.ansible.com/u/system)\ **Post date:** [October 13, 2022, 5:28pm UTC](https://forum.ansible.com/t/ansible-builtin-service-hangs/37220/4 "2022-10-13T17:28:42Z")
the 'hanging' was irrespective of the bad conditional, that would only condition execution or not. The reason it is hanging is probably due to the service itself, for that you need to examine the process on the host, likely culprit: the service is prompting for a response ---
**Author:** ![sivel](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/sivel/32/1198_2.png) [@sivel](https://forum.ansible.com/u/sivel)\ **Post date:** [October 13, 2022, 5:29pm UTC](https://forum.ansible.com/t/ansible-builtin-service-hangs/37220/5 "2022-10-13T17:29:27Z")
It is not super easy to diagnose a hanging module. I wrote up some instructions using gdb a few weeks back that may help in figuring out why the module is hanging: [https://gist.github.com/sivel/5076af99d310dbda3188722f02cddeb4](https://gist.github.com/sivel/5076af99d310dbda3188722f02cddeb4) Most often, when a process like this hangs, it is often due to the underlying command asking for some input, that the module is not designed to handle. Or the service is just taking a long time to stop for some reason. ---
**Author:** ![flowerysong1](https://avatars.discourse-cdn.com/v4/letter/f/ecae2f/32.png) [@flowerysong1](https://forum.ansible.com/u/flowerysong1)\ **Post date:** [October 13, 2022, 5:38pm UTC](https://forum.ansible.com/t/ansible-builtin-service-hangs/37220/6 "2022-10-13T17:38:35Z")
You are incorrect. Unquoted scalars and quoted scalars are just different YAML representations of the same data; once it’s parsed these two are completely identical. You have to have two levels of quotes (the YAML quotes and a quoted string as the Jinja expression) in order for it to be treated as always true: when: ‘“not i\_am”’ ---
**Author:** ![Axel\_Rau](https://avatars.discourse-cdn.com/v4/letter/a/ad7895/32.png) [@Axel\_Rau](https://forum.ansible.com/u/Axel_Rau)\ **Post date:** [October 15, 2022, 7:28pm UTC](https://forum.ansible.com/t/ansible-builtin-service-hangs/37220/7 "2022-10-15T19:28:29Z")
I did not succeed in setting this up in FreeBSD. I could build Python3.9 with debug symbols but gdb failed to load them. I finally found the cause for my problem: The rc script of mailman contained a su -l Replacing this by su fixed it. Thanks all who responded, Axel