I have exactly the same issue; but on AlmaLinux 8.7.
Mails in added to the queue have a Age of 23:00:00 h at the start. And are not send. Switching timezone will send them away. But switching back to correct timezone the issue is there again.
Datetime settings in Plesk are correct according the...
After 5 days of working without problems today I had the described issue 2 times till now.
proxy_error_log:
2015/07/14 14:38:57 [error] 31724#0: *43582 connect() failed (111: Connection refused) while connecting to upstream, client: xxx.xx.xx.xxx, server: domeinname.nl, request: "GET...
The first one I already did.
The second not, added the "resolver 127.0.0.1;" to the nginx.conf file.
Regenerate all domains and restarted apache and nginx.
Lets see if this is the solution!
Will keep you updated. Thanks so far!
Thanks IgorG, for your quick reply!
Resources are not an issue. Our monitoring tools give a highest CPU usage of 40,9% and for memory 39%.
But ran the command you suggested and all failcounters are 0, as shown in attached file.
Dear,
I have a strange issue on a Plesk 12 VPS. Sometimes the sites result in a "502 Bad Gateway (nginx)". This happens 1 or 2 times a day on different times.
In the httpd log I see a record "can't apply process slot" and in nginx log I see "connect() failed (111: Connection refused) while...