BTW, you can see example of stack trace generated when request-timeout occurs
in recent mailing list discussion at:
https://groups.google.com/d/msg/modwsgi/_i6MGs6fh6w/nH3x7_nuAwAJ
<https://groups.google.com/d/msg/modwsgi/_i6MGs6fh6w/nH3x7_nuAwAJ>
Graham
> On 7 Feb 2018, at 1:55 pm, Graham Dumpleton <[email protected]>
> wrote:
>
>
>
>> On 7 Feb 2018, at 1:52 pm, Jesus Cea <[email protected]> wrote:
>>
>> I find annoying that mod_wsgi doesn't log when it decides to restart a
>> daemon process because it becomes unresponsive. It could be useful even
>> log it when the maximum request number is reached (if defined) and the
>> daemon is recycled.
>
> On this specific issue, it will logs lots of stuff if you have Apache log
> level set to info.
>
> LogLevel info
>
> For request-timeout expiring it even logs stack traces for you if it can so
> you can see where it gets stuck.
>
> It is too noisy if logged at warn/err and not appropriate either.
>
> I will look at the other issues you raised later.
>
>> Beside that, it could be really useful mod_wsgi call "faulthandler" when
>> is about to reboot the daemon. This module was introduced in Python 3.3
>> and it is invaluable in deadlock situations, just the situation when
>> mod_wsgi decides to restart a daemon because it is unresponsible.
>>
>> Patch seems quite easy: Instead of killing the process as is, send first
>> a signal to request "faulthandler" dump, and then do the killing.
>>
>> An "atexit()" handler could be not enough if python interpreter is in
>> bad shape, etc. Moreover, I don't think "atexit()" knows if the daemon
>> is being killed because a service timeout or because somebody just
>> uploaded a new wsgi script.
>>
>> --
>> Jesús Cea Avión _/_/ _/_/_/ _/_/_/
>> [email protected] - http://www.jcea.es/ _/_/ _/_/ _/_/ _/_/ _/_/
>> Twitter: @jcea _/_/ _/_/ _/_/_/_/_/
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>> "My name is Dump, Core Dump" _/_/_/ _/_/_/ _/_/ _/_/
>> "El amor es poner tu felicidad en la felicidad de otro" - Leibniz
>>
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