Message10194

This bug is affecting me as well, so I did some more digging - It turns out there are a couple of problems here... (which maybe are getting conflated somehow?)

In the constructor of socket, CPython doesn't allow None for proto. It requires an integer. 

In setsockopt after creating a socket with proto = 0. The pika module mentioned sets TCP_NODELAY after creating a socket with proto = 0. In CPython this works, but in jython it does not. 

Here is the output of a Jython session (note the bare value 6 is the value on my system for socket.SOL_TCP which is not defined in Jython a third incompatibility)

>>> import socket
>>> s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, None)
>>> s.setsockopt(6, socket.TCP_NODELAY, 1)
>>> s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
>>> s.setsockopt(6, socket.TCP_NODELAY, 1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/Cellar/jython/2.7.0/libexec/Lib/_socket.py", line 1367, in meth
    return getattr(self._sock,name)(*args)
  File "/usr/local/Cellar/jython/2.7.0/libexec/Lib/_socket.py", line 357, in handle_exception
    return method_or_function(*args, **kwargs)
  File "/usr/local/Cellar/jython/2.7.0/libexec/Lib/_socket.py", line 357, in handle_exception
    return method_or_function(*args, **kwargs)
  File "/usr/local/Cellar/jython/2.7.0/libexec/Lib/_socket.py", line 1204, in setsockopt
    raise error(errno.ENOPROTOOPT, "Protocol not available")
_socket.error: [Errno 42] Protocol not available

In CPython this is the output:

>>> s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, None)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/Cellar/python/2.7.7_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 187, in __init__
    _sock = _realsocket(family, type, proto)
TypeError: an integer is required
>>> 
>>> 
>>> s = socket.socket(socekt.AF_INET, socket.SOCK_STREAM, 0)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'socekt' is not defined
>>> s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
>>> s.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1)


Note that in both systems, creating the socket without passing a value to the 3rd argument of the socket constructor, setsockopt works just fine. The mismatch appears to be on explicitly setting the 3rd argument to the default value.