[Python-Dev] Python related issue

[Manish Singh]

Hi All,

Please see below issue. Please reply on bug
http://bugs.python.org/issue28968


[ Issue ]
I have used xml rpc library with transport as http. My client and server
are running on same host.

Some xml rpc requests fail with connection reset by peer error number. I
have used xmlrpclib.ServerProxy() to call remote method on xml rpc server
running on an ephemeral port.

This issue has happen many times.

log snippet,

  File "/usr/lib64/python2.6/xmlrpclib.py", line 1489, in __request
    verbose=self.__verbose
  File "/usr/lib64/python2.6/xmlrpclib.py", line 1237, in request
    errcode, errmsg, headers = h.getreply()
  File "/usr/lib64/python2.6/httplib.py", line 1064, in getreply
    response = self._conn.getresponse()
  File "/usr/lib64/python2.6/httplib.py", line 990, in getresponse
    response.begin()
  File "/usr/lib64/python2.6/httplib.py", line 391, in begin
    version, status, reason = self._read_status()
  File "/usr/lib64/python2.6/httplib.py", line 349, in _read_status
    line = self.fp.readline()
  File "/usr/lib64/python2.6/socket.py", line 433, in readline
    data = recv(1)
error: [Errno 104] Connection reset by peer

[ Test Environment ]
RHEL 6 with linux kernel 2.6.32-504.16.2.el6.
Python 2.6.6
glibc-2.12-1.149.7


[ Possible Reasons for it ]

1) The machine is connected to the network, and the network is not
responsive.
2) The other side of the connection is not running normally.
3) There are not enough system resources available. Free up system
resources if they are running low.

Possibility for 1 and 2 are not applicable as it is loop back
communication(Client and Server running on same machine).
For Possibility 3, I have already checked system resource and there are
enough resources(80% RAM used, 20% cpu usage, around 10 GB RAM free).

I checked for other reasons and i found that this issue may be related with
GIL,
Please refer this link,
http://stackoverflow.com/questions/383738/104-connection-reset-by-peer-socket-error-or-when-does-closing-a-socket-resu

1> Can you please let me know, is it really a issue realted with GIL?
2> If yes, How to resolve this issue?
3> If no, what other reason may exists for such failure. [Note: Those rpc
requests fail which return python's dictionary data to client]

-- 
Er. Manish Singh
Engineer at NEC Technologies India Limited
Computer Science & Engineering
M.Tech ( MNNIT CS Allahabad )
B. Tech ( Calcutta Institute Of Engg. & Mgmt., Kolkata )
< email : manish.ciem at gmail.com >
< contact no. -  9899886538, 9651540577 >
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