> 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.
>
> --
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