In order to provide more information to link a connection from an application to a database connection (for example via TCP dump), add local_port as part of the log.
In addition, add connection timeout to provide more information .

Before

SQL Primary node [{}, conn={}] connection fail. Reason : {}

After

SQL Primary node [{}, conn={}, local_port={}, timeout={}] connection fail. Reason : {}

Pull request: https://github.com/MariaDB/mariadb-connector-j/pull/127