Worked on improving database resilience in the rails/rails repository by addressing MySQL error 1046, which occurs when no database is selected. Implemented logic in Ruby to classify this error as a ConnectionFailed exception, allowing the existing retry mechanism to automatically reissue affected queries after a connection is reestablished. Focused on backend development and database management, the changes reduced transient query failures and improved uptime for Rails applications using MySQL, particularly in environments prone to idle timeouts or proxy resets. Emphasized robust error handling to ensure higher stability and reliability for deployments that experience intermittent database connectivity issues.