SocketServer.ThreadingTCPServer - Cannot bind to address after program restart
linux, python, sockets, tcpserver
Solution
In this particular case, `.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)` may be called from the TCPServer class when the `allow_reuse_address` option is set. So I was able to solve it as follows:
httpd = SocketServer.ThreadingTCPServer(('localhost', port), CustomHandler, False) # Do not automatically bind
httpd.allow_reuse_address = True # Prevent 'cannot bind to address' errors on restart
httpd.server_bind() # Manually bind, to support allow_reuse_address
httpd.server_activate() # (see above comment)
httpd.serve_forever()
Anyway, thought this might be useful. The solution will differ slightly in Python 3.0
Problem
As a follow-up to cannot-bind-to-address-after-socket-program-crashes, I was receiving this error after my program was restarted: socket.error: [Errno 98] Address already in use In this particular case, instead of using a socket directly, the program is starting its own threaded TCP server: ``` httpd = SocketServer.ThreadingTCPServer(('localhost', port), CustomHandler) httpd.serve_forever() ``` How can I fix this error message?