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POPython, Asyncore and forks
 

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    <p>Just for starters, I used Twisted and SocketServer with both ForkMixIn, ThreadMixIn and tried the "thread-pool" recepies.</p> <p>However, I wanted to make something particular work in Python.</p> <p>Alittle background. Previously I wrote in C a simple TCP deamon that would bind to a socket and listen on it, then pre-fork X many times and then just pass the serversocket desc to all the forks and everyone would accept the clients very very marrily.</p> <p>I checked out the "select/poll" based asyncore which I like alot. My only beef was that I could get a little CPU unbound by forking a few times to take advantage of the multi-cpu machine and hope for the best with scheduling.</p> <p>I cant make it work for the life of me. Only 1 single instance can accept connections, all others simply throw an exception on handling the connect, 'can not iterate thru Empty'.</p> <p>is this even feasible? I checked alot, but I couldnt find ANY code for forking asyncore dispatchers (cry)</p> <p>Thank you!</p> <p><strong>Update 1: (Full traceback as requested)</strong></p> <pre><code>error: uncaptured python exception, closing channel &lt;__main__.EchoServer listening 0.0.0.0:8001 at 0x2ad4880c93f8&gt; (&lt;type 'exceptions.TypeError'&gt;:'NoneType' /python2.6/asyncore.py|readwrite|99] [/usr/local/python2.6.9/lib/python2.6/asyncore.py|handle_read_event|408] [./6py-server.py|handle_accept|87]) </code></pre> <p>Always happens in accept, regardless if I fork before the asyncore.loop, etc.</p> <p><strong>Update 2: (full source)</strong> <a href="http://pastebin.ca/1666012" rel="nofollow noreferrer">pastebined source</a></p>
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    1. USTerry Felkrow
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    1. COCould you update the question with exact traceback?
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      1. USDenis Otkidach
    2. CODone, and sorry for not doing it in the first place. Very silly of me.
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      1. USTerry Felkrow
    3. COAlso added full source, just in case someone has the time and will to give this one a shot. Apologies for not including everything relevant from the get-go.
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