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socket erroe when invoking python from java app

Posted on 2004-09-09
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Last Modified: 2010-04-16
hi everyone,

I seem to have a winsock error when I tried to invoke my python xml server from within my java application. I know the server works fine because I checked it independently, I also manually started the server and then call the functions from my java app the problem is when I tried to start the python server from within the app I get the following error

Traceback (most recent call last):

  File "C:/Python23/new folder/file.py", line 1307, in ?

    server = SimpleXMLRPCServer.SimpleXMLRPCServer(("localhost", 8080))

  File "C:\Python23\lib\SimpleXMLRPCServer.py", line 450, in __init__

    SocketServer.TCPServer.__init__(self, addr, requestHandler)

  File "C:\Python23\lib\SocketServer.py", line 329, in __init__

    self.socket_type)

  File "C:\Python23\lib\socket.py", line 154, in __init__

    _sock = _realsocket(family, type, proto)

socket.error: (10091, 'Network subsystem is unvailable')


Any idea on why this happens?

thanks
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Question by:jom20
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cjjclifford earned 200 total points
ID: 12024989
Hi,

Its probably related to runtime environments in this case - when you run the python application from cmdline, and it works, have a look at the environment (particularly around Python related paths/variables, and shared library/DLL paths/variables (its likely that the socket library (winsock?) is a DLL that needs some environment set (I don't use windows, so I can't figure it out completely). The environment that the java program is invoked is not passed on in calls to Runtime.exec(), you have to use the Runtime.exec() method that allows setting environment (i.e. the one with 3 arguments).

Try the following:

list the environment from cmdline.
run the python program
if the program works, unset one of the environment variables.
keep trying till one the program fails for the same reason as it is in Java - this is what needs to be set!

Cheers,
C.
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