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POTornado socket.error on ARM
 

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  1. POTornado socket.error on ARM
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    <p>I'm trying to run a small python webapp on a RasPi using the Tornado server, but whenever I try to start it, I get the error</p> <pre><code>Traceback (most recent call last): File "main.py", line 78, in &lt;module&gt; application.listen(8080) File "/usr/local/lib/python2.7/dist-packages/tornado-3.0.1-py2.7.egg/tornado/web.py", line 1343, in listen server.listen(port, address) File "/usr/local/lib/python2.7/dist-packages/tornado-3.0.1-py2.7.egg/tornado/tcpserver.py", line 113, in listen sockets = bind_sockets(port, address=address) File "/usr/local/lib/python2.7/dist-packages/tornado-3.0.1-py2.7.egg/tornado/netutil.py", line 69, in bind_sockets sock = socket.socket(af, socktype, proto) File "/usr/lib/python2.7/socket.py", line 187, in __init__ _sock = _realsocket(family, type, proto) socket.error: [Errno 97] Address family not supported by protocol </code></pre> <p>I'm reasonably sure I did everything properly</p> <ul> <li>The port I'm attempting to listen on isn't otherwise in use</li> <li>I don't specify an address, but it doesn't seem I need to since the <a href="http://www.tornadoweb.org/en/stable/#hello-world" rel="nofollow">Tornado "hello world"</a> doesn't either (That demo app itself doesn't run either; it gives exactly the same error with a different line number)</li> <li>The same app seemingly runs fine on x86 and x86_64 machines</li> </ul> <p>Is there a different call I need to make on ARM, or is this a bug somewhere in tornado/socket.py? Is there a workaround available?</p> <p>Since it seems to be relevant, the Pi is running the latest Raspbian image from <a href="http://www.raspberrypi.org/downloads" rel="nofollow">this page</a> (downloaded from the second mirror a couple of days ago, so not <em>the</em> latest anymore). I'm currently trying out an older version, and will try out the latest if that doesn't work.</p>
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    1. CODoes the "Tornado hello world" app run on your RasPi?
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    2. CO@Robᵩ - Just tried it; no, it gives me the same error.
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    3. COIt would be helpful if **socket.py** printed the *address family*. I guess you use **Linux**? This is most likely a kernel `.config` issue. For instance, your Linux on the *Raspberry Pi* may not be configured with *Unix Domain* sockets. I doubt this is ARM related. Please provide information on the OS.
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