Dear Apache Doris Foundation, I hope this message finds you well. I am writing to bring to your attention an issue we encountered while attempting to deploy an Apache Doris cluster.
Me and my teammate successfully managed to start the frontend services, including the master, follower, and observer nodes. However, we encountered difficulties with the backend nodes. We diligently configured the ports and priority networks as per the guidelines provided in the official documentation. Additionally, we followed the prescribed steps to add the backend nodes to the frontend cluster using MySQL commands. Despite our efforts and adherence to the documentation, we encountered challenges in starting the backend services. After reviewing the logs, we found that the backend nodes consistently failed to start up due to a java.net.ConnectException: Connexion refusée (Connection refused) error. We meticulously followed the official documentation, ensuring that all configurations were accurately set. Furthermore, in an attempt to resolve the issue, we disabled the firewall to ensure that it wasn't causing any connection issues. Given the critical nature of backend node functionality within the Apache Doris cluster, we are reaching out to seek your assistance in diagnosing and resolving this issue. Any guidance, insights, or recommendations you could provide to help us overcome this obstacle would be immensely appreciated. Thank you for your attention to this matter. We eagerly await your response and assistance in resolving this issue. Sincerely, Taher Chaltout, Data engineering student at Faculty of Sciences of Sfax,Tunisia.
