Good afternoon Mr. Lachapelle, I write to let you and the other posters in this thread know that we experience the same issue with two SOGo servers. Some time ago, we upgraded them from 5.2 to 5.4 and started seeing these error messages in the logs :
/sogod[26069:26069] EXCEPTION: <MySQL4CouldNotOpenChannelException: 0x560ffa0fb410> NAME:NoMoreConnections REASON:cannot open a additional connection ! //INFO:(null)/ These errors occur throughout the day when more clients open open/update calendars (a few mobiles devices either with Android/Dav5x or iPhones and mostly Thunderbird 91 with the latest SOGo connector). We could reduce the number of occurrences by tweaking the max_connections and wait_timeout parameters of MySQL but it doesn't solve the problem of idle connections piling up. Upgrading to the latest SOGo 5.5 nightly neither. Our SOGo installations run on Debian 9 and use MySQL 5.5. If more info, tests or logs are needed, I'll be glad to provide them. If you need me to file a detailed bug report, please just ask. Thank you for your help. Best regards, Fabio -- users@sogo.nu https://inverse.ca/sogo/lists
