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[oza.4h07 at gmail.com]

2016-09-02 20:40 GMT+02:00 George Joseph <gjoseph@digium.com (gjoseph@digium.com)>:

[oza.4h07 at gmail.com]

Hello,


After testing "pkill -SEGV -f /usr/sbin/asterisk" on Debian Jessie platform, I've got several questions :



1.  When I issue a "cd /tmp; asterisk -cvvvvvvvvvvvg -U asterisk -G asterisk" command, and then issue a "pkill -SEGV asterisk" command,

I can read on Asterisk console:
*CLI> Segmentation error (core dumped)

(*) I translated into english the exact output I got.


I see a /tmp/core file exists.



My asterisk.conf includes:
full = verbose,notice,warning,error,debug


After Asterisk's stop, my /var/log:asterisk/full doesn't include any mention to Segmentation error.

I cannot find anything in dmesg, /var/log/messages or /var/log/kern.log as I did when a real segmentation fault occurred on production system.



I would expect Asterisk to log something.

Is this expected behaviour ?


2. When I issue a "cd /tmp; systemctl start asterisk" command, and then issue a "pkill -SEGV asterisk" command,
I can read on Asterisk console:
Disconnected from Asterisk server
Asterisk cleanly ending (0).
Executing last minute cleanups


I cannot find any core file anyware.


File /var/log:asterisk/full doesn't include any mention to Segmentation error.


Where should core file be created when Asterisk is run as a daemon by asterisk user and group ?

Is there a setting I can use to specify the directory used (so that we can make sure appropriate ownership is set) ?


Cheers









2016-09-05 13:36 GMT+02:00 Olivier <oza.4h07@gmail.com (oza.4h07@gmail.com)>:

[gjoseph at digium.com]

On Tue, Sep 6, 2016 at 1:55 AM, Olivier <oza.4h07@gmail.com (oza.4h07@gmail.com)> wrote:

[tzafrir.cohen at xorco...]

On Tue, Sep 06, 2016 at 06:37:52AM -0600, George Joseph wrote:

[asterisk.org at sedwar...]

[oza.4h07 at gmail.com]

2016-09-06 14:37 GMT+02:00 George Joseph <gjoseph@digium.com (gjoseph@digium.com)>:

[oza.4h07 at gmail.com]

2016-09-06 17:48 GMT+02:00 Tzafrir Cohen <tzafrir.cohen@xorcom.com (tzafrir.cohen@xorcom.com)>:

[gjoseph at digium.com]

On Wed, Sep 7, 2016 at 11:03 AM, Olivier <oza.4h07@gmail.com (oza.4h07@gmail.com)> wrote:

[gjoseph at digium.com]

On Wed, Sep 7, 2016 at 11:15 AM, Olivier <oza.4h07@gmail.com (oza.4h07@gmail.com)> wrote:

[oza.4h07 at gmail.com]

I think were getting closer:


I did:

- I edited /etc/default/asterisk to include :
AST_USER="root"
AST_GROUP="root"


# systemctl daemon-reload

# systemctl start asterisk
# ps aux | grep asterisk
root      3602  7.1  2.5  60332 26012 ?        Ssl  16:00   0:03 /usr/sbin/asterisk -U root -G root -g

# rasterisk

# pkill -SEGV asterisk


Then console showed:

Segmentation error (core dumped)



and a /core file is created



I also tried with asterisk run asterisk user and group and looked for any newly created (find / -cmin -2) : nothing looking like a core file, though I might overlooked it.


So, it really look like a configuration issue: "how to specify, with asterisk and systemd among others, where core files are dumped ?".


I'll read again this thread advices and report back here.








2016-09-07 21:44 GMT+02:00 George Joseph <gjoseph@digium.com (gjoseph@digium.com)>:

[oza.4h07 at gmail.com]

Adding an /etc/sysctl.d/foobar.conf file with the bellow content allowed me to at last produce core dump files (in /var/tmp directory), even if asterisk is run by asterisk user (and by root).

I choosed this /var/tmp directory to make sure core dumps are not erased after a reboot and because this directory is "world-writable".

To trigger core dumping, previously recommended "pkill -SEGV asterisk" was used.



/etc/sysctl.d/foobar.conf content is simply:
kernel.core_pattern=/var/tmp/core.%e.%t



Maybe taming systemd to consider /var/lib/asterisk as a current directory when running asterisk daemon would be a better solution ?


Maybe Asterisk or more generally long running daemons, should warn when they are run with "-g option" and from a current directory where it can't write any file (or any file matching core pattern) ?

Maybe this is already done but I overlooked it or looked in the wrong place ?


Anyway, thank you very much to all.


2016-09-08 16:22 GMT+02:00 Olivier <oza.4h07@gmail.com (oza.4h07@gmail.com)>:

[jajcus at jajcus.net]

On 2016-09-09 11:34, Olivier wrote:

[oza.4h07 at gmail.com]

2016-09-09 13:24 GMT+02:00 Jacek Konieczny <jajcus@jajcus.net (jajcus@jajcus.net)>:

[tzafrir.cohen at xorco...]

On Wed, Sep 07, 2016 at 01:41:55PM -0600, George Joseph wrote: