[jira] [Created] (THRIFT-3800) Python THttpClient hangs on Oneway methods in the test suite

["Martin Wilck (JIRA)" <ji...@apache.org>]

Martin Wilck created THRIFT-3800:
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             Summary: Python THttpClient hangs on Oneway methods in the test suite
                 Key: THRIFT-3800
                 URL: https://issues.apache.org/jira/browse/THRIFT-3800
             Project: Thrift
          Issue Type: Bug
          Components: Python - Library, Test Suite
    Affects Versions: 0.9.3, 1.0
         Environment: Linux / Python
            Reporter: Martin Wilck


The generated python  code for "oneway" methods calls flush() to send the data. The flush() method of THttpClient calls http_client.HTTPCconnection.getresponse(). This hangs forever waiting for a HTTP response from the server, unless a timeout  has been specified, in which case the respective test simply fails. The reason for this is that the HTTP TestServer (C++) does not send a HTTP response for oneway messages (verified this using wireshark with the default "simple" server).

IMO this is in fact a bug of the TestServer, because the HTTP protocol specification clearly states that the server has to send "one ore more" HTTP response messages in reply to every request message (https://tools.ietf.org/html/rfc7230, 2.1).

However, the test suite for other languages (C++) works fine with this setup and fails with python.

Steps to reproduce:

#  Build thrift with py support
# Run a HTTP test with cpp server and python client:

{noformat}
cd test/py
../cpp/TestServer --protocol=compact --transport=http --port=51291 &> /tmp/server.log
./TestClient.py --verbose --host=localhost --genpydir=gen-py --protocol=compact --http=/ --port=51291
{noformat}

*Result:* the client hangs forever in the "testOneway" test. When killed with ctrl-c, it can be seen to hang in the following call stack:

{noformat}
...
  File "test/py/gen-py/ThriftTest/ThriftTest.py", line 1070, in testOneway
    self.send_testOneway(secondsToSleep)
  File "test/py/gen-py/ThriftTest/ThriftTest.py", line 1078, in send_testOneway
    self._oprot.trans.flush()
  File "lib/py/build/lib.linux-x86_64-2.7/thrift/transport/THttpClient.py", line 129, in _f
    result = f(*args, **kwargs)
  File "lib/py/build/lib.linux-x86_64-2.7/thrift/transport/THttpClient.py", line 168, in flush
    self.__http_response = self.__http.getresponse()
  File "/usr/lib64/python2.7/httplib.py", line 1067, in getresponse
    response.begin()
  File "/usr/lib64/python2.7/httplib.py", line 409, in begin
    version, status, reason = self._read_status()
  File "/usr/lib64/python2.7/httplib.py", line 365, in _read_status
    line = self.fp.readline(_MAXLINE + 1)
  File "/usr/lib64/python2.7/socket.py", line 476, in readline
    data = self._sock.recv(self._rbufsize)
{noformat}

*Expected Result:* Success.




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