Issue Too much redirections ... Solved by clearing NGINX cache

[Pascal_Netenvie]

Server operating system version

Debian 11.11

Plesk version and microupdate number

Plesk Obsidian 18.0.72 Update #3

Hello,
We have rarely but regularly the same problem on different servers.
Suddenly website hosted become unvailable because there is too much redirections (perhaps after SSL certifcate renew).

Clearing NGINX cache manually solve the problem imemdiatly ...
Although NGINX cache lifetime is 30 min the problem can last hours until we clear it manualy.

The problem don't occur on browsers that have recently visit site.
It seems to be related to SSL certificate ...

Some solutions or idea ?

Regards.

 

[Sebahat.hadzhi]

Hello, @Pascal_Netenvie . Are your Nginx caching settings different than the default values? If yes, kindly try adjusting them for the sake of testing. Also, please check the syntax of Nginx's config by running the following command:

nginx -t

 

[Pascal_Netenvie]

NGINX settings are close to default.

nginx -t display that :

nginx: [warn] "ssl_stapling" ignored, no OCSP responder URL in the certificate "                                                                                                                                                                             /opt/psa/var/certificates/scfzmhgVQ"
nginx: [warn] "ssl_stapling" ignored, no OCSP responder URL in the certificate "                                                                                                                                                                             /opt/psa/var/certificates/scfj4XfTr"
nginx: [warn] "ssl_stapling" ignored, no OCSP responder URL in the certificate "                                                                                                                                                                             /opt/psa/var/certificates/scfj4XfTr"
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

 

[Sebahat.hadzhi]

I don't think the warning should be causing the issue you are describing, but you can disable OCSP stapling in domains > domain.com > SSL/TLS certificates. Have you tried matching the default values of Nginx caching settings?