I looked at this a bit. The message isn't directly related to that setting. In fact, it's an internal error message. ATS tracks the number of outbound connections for each IP address. This error message indicates that the number of connections to some IP address is negative, which clearly makes no sense.
What I would suspect it somehow the minimum connection logic isn't updating the outbound session tracking but when such a session ends it still decrements the count, leading to negative values. Would it be possible to check if ATS 10 has this issue? -----Original Message----- From: Veiko Kukk <[email protected]> Sent: Monday, October 23, 2023 11:35 AM To: [email protected] Subject: ATS 9.2.3 and proxy.config.http.per_server.connection.min Hi I'm upgrading from 7.1 to 9.2.3 and attempting to get a certain amount of connections kept open between ATS and upstream server to avoid connection creation overhead. In 7.1 this worked well CONFIG proxy.config.http.origin_min_keep_alive_connections INT 50 In 9.2.3 enabling CONFIG proxy.config.http.per_server.connection.min INT 50 results in many lines of errors displayed in diags.log [Oct 23 16:26:59.192] [ET_NET 0] ERROR: [http_ss] [188] number of connections should be greater than or equal to zero: 4294967295 [Oct 23 16:27:15.309] [ET_NET 0] ERROR: [http_ss] [210] number of connections should be greater than or equal to zero: 4294967295 [Oct 23 16:27:29.543] [ET_NET 1] ERROR: [http_ss] [203] number of connections should be greater than or equal to zero: 4294967295 [Oct 23 16:27:59.336] [ET_NET 0] ERROR: [http_ss] [219] number of connections should be greater than or equal to zero: 4294967295 [Oct 23 16:28:15.683] [ET_NET 0] ERROR: [http_ss] [241] number of connections should be greater than or equal to zero: 4294967295 [Oct 23 16:28:31.506] [ET_NET 1] ERROR: [http_ss] [234] number of connections should be greater than or equal to zero: 4294967295 Connections through proxy work even though those strange errors are displayed. Veiko
