Address already in use
The root error Address already in use occurs when an application tries to bind to a network address (IP and port combination) that is already occupied by another process. This error is commonly encountered in Linux and Windows systems, Java and Spring Boot applications, Docker containers, databases, and web server environments where network services listen on fixed ports. When does this error occur? When starting a server while another process is already listening on the same address When an application restarts quickly and the previous socket has not been released When multiple services are configured to use the same IP and port When a Docker container is still bound to a host address When system services automatically start and occupy common ports Root cause of Address already in use The Address already in use error is enforced by the operating system’s networking stack. Each network address can be bound by only one process at a time for a given protocol. If...