I've seen this error a couple of times, and to fix it, I just reboot my server.
Fatal error: Uncaught exception 'MongoConnectionException' with message 'Failed to connect to: localhost:27017: Previous connection attempts failed, server blacklisted' in /var/www/html/include/config.php:9 Stack trace: #0 /var/www/html/include/config.php(9): MongoClient->__construct('mongodb://local...') #1 /var/www/html/classes.php(3): include('/var/www/html/i...') #2 /var/www/html/myusers.php(8): include('/var/www/html/c...') #3 {main} thrown in /var/www/html/include/config.php on line 9
However, I can be a while without seeing it... How can I prevent the issue from happening?
update: it happened again and after several minutes of waiting, I had to reboot to make the site work again