[Koha] Plack unable to restart once every week

[Jonathan Druart]

Hello Andreas,

You should take a look at bug 17814, it may be related and fix your problem.
Let us know

Regards,
Jonathan

On Tue, 25 Apr 2017 at 05:48 Andreas Roussos <arouss1980 at gmail.com> wrote:

> Dear List,
>
> We are running Koha 16.05.02 on Debian 8, installed from packages.
>
> Recently we enabled Plack, and have been observing the following behaviour:
> once every week on a Sunday, the Plack process will fail to restart.
> This results in a "Service Unavailable" page when trying to load the Staff
> Interface.
> The relevant entries from the log files are marked with an asterisk below.
>
> /var/log/koha/imp$ zegrep "closing|starting" plack-error.log* | sort -t ':'
> -k 2
> plack-error.log.5.gz:2017/03/27-06:29:17 Server closing!
> plack-error.log.4.gz:2017/03/27-06:29:19 Starman::Server (type
> Net::Server::PreFork) starting! pid(26134)
> plack-error.log.4.gz:2017/03/28-06:29:17 Server closing!
> plack-error.log.4.gz:2017/03/28-06:29:20 Starman::Server (type
> Net::Server::PreFork) starting! pid(3699)
> plack-error.log.4.gz:2017/03/29-06:29:15 Server closing!
> plack-error.log.4.gz:2017/03/29-06:29:17 Starman::Server (type
> Net::Server::PreFork) starting! pid(11642)
> * plack-error.log.4.gz:2017/04/02-06:29:23 Server closing!
> * plack-error.log.3.gz:2017/04/02-11:28:27 Starman::Server (type
> Net::Server::PreFork) starting! pid(972)
> plack-error.log.3.gz:2017/04/03-06:29:23 Server closing!
> plack-error.log.3.gz:2017/04/03-06:29:27 Starman::Server (type
> Net::Server::PreFork) starting! pid(5798)
> * plack-error.log.3.gz:2017/04/09-06:29:25 Server closing!
> * plack-error.log.2.gz:2017/04/09-13:58:48 Starman::Server (type
> Net::Server::PreFork) starting! pid(964)
> plack-error.log.2.gz:2017/04/11-06:29:30 Server closing!
> plack-error.log.2.gz:2017/04/11-06:29:33 Starman::Server (type
> Net::Server::PreFork) starting! pid(9831)
> * plack-error.log.2.gz:2017/04/16-07:36:00 Server closing!
> * plack-error.log.2.gz:2017/04/16-09:02:50 Starman::Server (type
> Net::Server::PreFork) starting! pid(984)
> plack-error.log.2.gz:2017/04/17-06:29:25 Server closing!
> plack-error.log.1:2017/04/17-06:29:27 Starman::Server (type
> Net::Server::PreFork) starting! pid(5563)
> * plack-error.log.1:2017/04/23-06:29:32 Server closing!
> * plack-error.log:2017/04/23-10:36:14 Starman::Server (type
> Net::Server::PreFork) starting! pid(7389)
>
> As you can see, on the 2nd/9th/16th/23rd of April (i.e. every 7
> days) the Plack process did not restart automatically and we had
> to start it manually with `koha-plack --start imp`.
>
> FWIW, we do not have anacron installed and haven't made any
> changes to the Koha logrotate script.
>
> Does anyone have any leads as to what may be causing this behaviour?
>
> Thanks in advance!
>
> Kind regards,
> Andreas Roussos
> Systems Administrator
> Holy Monastery of the Paraclete
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