SocketServer.ThreadingTCPServer-程序重新启动后无法绑定到地址 [英] SocketServer.ThreadingTCPServer - Cannot bind to address after program restart

问题描述

作为无法绑定到地址的后续操作-after-socket-program-crashes ，我的程序重新启动后，我收到此错误:

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]地址已在使用中

socket.error: [Errno 98] Address already in use

在这种特殊情况下，程序将直接启动其自己的线程化TCP服务器，而不是直接使用套接字:

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()

如何解决此错误消息?

推荐答案

在这种特殊情况下，当设置allow_reuse_address选项时，可以从TCPServer类中调用.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1).因此，我能够按以下方式解决它:

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()

无论如何，以为这可能有用.该解决方案在Python 3.0中会略有不同

Anyway, thought this might be useful. The solution will differ slightly in Python 3.0

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