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<P><FONT SIZE=2>Dear All,</FONT>
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<P><FONT SIZE=2>I have created some code to close all active connections to a server, spawn a new instance of itself and call reactor.stop() to facilitate a remote bootstrap restart of a server. The bootstrapping process takes place through a loader where if passed an option to bootstrap the code pauses for 20 secs to allow the previous process to exit:</FONT></P>
<P><FONT SIZE=2>import sys</FONT>
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<P><FONT SIZE=2>if sys.argv[1] == "--bootstrap" or sys.argv[1] == "-b":</FONT>
<BR><FONT SIZE=2> print 'bootstrapping'</FONT>
<BR><FONT SIZE=2> del sys.argv[1]</FONT>
<BR><FONT SIZE=2> import time</FONT>
<BR><FONT SIZE=2> time.sleep(20.0)</FONT>
</P>
<P><FONT SIZE=2>from twisted.python.runtime import platformType</FONT>
<BR><FONT SIZE=2>if platformType == "win32":</FONT>
<BR><FONT SIZE=2> from twisted.scripts.twistw import run</FONT>
<BR><FONT SIZE=2>else:</FONT>
<BR><FONT SIZE=2> from twisted.scripts.twistd import run</FONT>
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<P><FONT SIZE=2>run()</FONT>
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<P><FONT SIZE=2>However the above code does not allow the server to start since twistd complains that the port is in use:</FONT>
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<P><FONT SIZE=2>2005/03/24 17:14 AUS Eastern Daylight Time [-] Log opened.</FONT>
<BR><FONT SIZE=2>2005/03/24 17:14 AUS Eastern Daylight Time [-] twistd 1.3.0 (C:\Python23\python.exe 2.3.3) starting up</FONT>
<BR><FONT SIZE=2>2005/03/24 17:14 AUS Eastern Daylight Time [-] reactor class: twisted.internet.default.SelectReactor</FONT>
<BR><FONT SIZE=2>2005/03/24 17:14 AUS Eastern Daylight Time [-] managers.ConnectionManager starting on 12005</FONT>
<BR><FONT SIZE=2>2005/03/24 17:14 AUS Eastern Daylight Time [-] Traceback (most recent call last):</FONT>
<BR><FONT SIZE=2>2005/03/24 17:14 AUS Eastern Daylight Time [-] File "D:\python projects\programs\zcfscheduler\loader.py", line 15, in ?</FONT></P>
<P><FONT SIZE=2>2005/03/24 17:14 AUS Eastern Daylight Time [-] run()</FONT>
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<P><FONT SIZE=2><-- snip --></FONT>
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<P><FONT SIZE=2>2005/03/24 17:14 AUS Eastern Daylight Time [-] return getattr(reactor, 'listen'+self.method)(*self.args, **self.kwargs)</FONT></P>
<P><FONT SIZE=2>2005/03/24 17:14 AUS Eastern Daylight Time [-] File "C:\Python23\lib\site-packages\twisted\internet\default.py", line 283, in listenTCP</FONT></P>
<P><FONT SIZE=2>2005/03/24 17:14 AUS Eastern Daylight Time [-] p.startListening()</FONT>
<BR><FONT SIZE=2>2005/03/24 17:14 AUS Eastern Daylight Time [-] File "C:\Python23\lib\site-packages\twisted\internet\tcp.py", line 594, in startListening</FONT></P>
<P><FONT SIZE=2>2005/03/24 17:14 AUS Eastern Daylight Time [-] raise CannotListenError, (self.interface, self.port, le)</FONT>
<BR><FONT SIZE=2>2005/03/24 17:14 AUS Eastern Daylight Time [-] twisted.internet.error.CannotListenError: Couldn't listen on any:12005: (10048, 'Address already in use').</FONT></P>
<P><FONT SIZE=2>how can i get the server to stop, restart itself and release the port in the process?</FONT>
</P>
<P><FONT SIZE=2>Regards,</FONT>
</P>
<P><FONT SIZE=2>Grant McDonald</FONT>
</P>
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