Hello,

I was tasked to install Asterisk 13.16.0. from source on a CentOS7 platform.

For that purpose, I used an unmaintened script of mine, written 10 monthes
ago, and I was surprised to get segmentation violations whenever I ran
"asterisk -cvvvvvvv -U asterisk".

Usually, my /etc/asterisk/modules.conf file includes "autoload=yes" setting.

Basically, I see two alternative methods:

1. leave "autoload=yes and remove modules one by one in modules.conf.
When segmentation violations stops, then focus on latest disabled module.

2.set  "autoload=no and add modules one by one in modules.conf.
When segmentation violations starts, then focus on latest enabled module.


I've not decided yet which method I should use but I must add here that I'm
very suprised to observe things like bellow:

*CLI> module show
Module                         Description                              Use
Count  Status      Support Level
res_pjsip.so                   Basic SIP resource
0          Not Running          core
1 modules loaded
*CLI> module unload res_pjsip.so
Unable to unload resource res_pjsip.so
Command 'module unload res_pjsip.so' failed.
*CLI> module
load    reload  show    unload
*CLI> module show
Module                         Description                              Use
Count  Status      Support Level
res_pjsip.so                   Basic SIP resource
0          Not Running          core
1 modules loaded
*CLI> module unload res_pjsip.so
Unable to unload resource res_pjsip.so
Command 'module unload res_pjsip.so ' failed.
*CLI> module reload res_pjsip.so
The module 'res_pjsip.so' was not properly initialized. Before reloading
the module, you must run "module load res_pjsip.so" and fix whatever is
preventing the module from being initialized.
*CLI> module load res_pjsip.so
Unable to load module res_pjsip.so
Command 'module load res_pjsip.so' failed.
*CLI> module show
Module                         Description                              Use
Count  Status      Support Level
res_pjsip.so                   Basic SIP resource
0          Not Running          core
1 modules loaded


Form full file:
...
2017-06-12 10:15:05] WARNING[1649] loader.c: Unload failed, 'res_pjsip.so'
is not loaded.


My questions are:
1. When autoload=yes, if module foo.so depens on bar.so, does loading of
foo.so also loads bar.so ?

2. How shall I understand the above load/unload/reload sequence ?

3. I'm inclined to load modules one by one and set autoload=no, but I would
like to be 100% sure to avoid runtime errors due to missing module/config
file/dependency/whatever. What would you suggest ?

Regards
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