python3 + macOS = connection error

[horagong]

melodic 1.14.2 version on mac OS

I compiled ROS melodic. When I rosrun turtlesim turtlesim_node, it gives errors.

[rosmaster.master][INFO] 2018-07-29 20:17:24,247: publisherUpdate[/rosout] -> http://localhost:64132/ ['http://localhost:64140/']: sec=0.01, exception=[Errno 54] Connection reset by peer
[rosmaster.threadpool][ERROR] 2018-07-29 20:17:24,250: Traceback (most recent call last):
  File "/opt/ros/melodic/lib/python3.7/site-packages/rosmaster/threadpool.py", line 218, in run
    result = cmd(*args)
  File "/opt/ros/melodic/lib/python3.7/site-packages/rosmaster/master_api.py", line 210, in publisher_update_task
    ret = xmlrpcapi(api).publisherUpdate('/master', topic, pub_uris)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/xmlrpc/client.py", line 1112, in __call__
    return self.__send(self.__name, args)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/xmlrpc/client.py", line 1452, in __request
    verbose=self.__verbose
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/xmlrpc/client.py", line 1154, in request
    return self.single_request(host, handler, request_body, verbose)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/xmlrpc/client.py", line 1167, in single_request
    resp = http_conn.getresponse()
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py", line 1321, in getresponse
    response.begin()
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py", line 296, in begin
    version, status, reason = self._read_status()
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py", line 257, in _read_status
    line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/socket.py", line 589, in readinto
    return self._sock.recv_into(b)
ConnectionResetError: [Errno 54] Connection reset by peer

and then, rosrun turtlesim turtle_teleop_key,

[rosmaster.master][INFO] 2018-07-29 20:18:55,499: publisherUpdate[/rosout] -> http://localhost:64132/ ['http://localhost:64158/']: sec=0.00, exception=[Errno 32] Broken pipe
[rosmaster.threadpool][ERROR] 2018-07-29 20:18:55,500: Traceback (most recent call last):
  File "/opt/ros/melodic/lib/python3.7/site-packages/rosmaster/threadpool.py", line 218, in run
    result = cmd(*args)
  File "/opt/ros/melodic/lib/python3.7/site-packages/rosmaster/master_api.py", line 210, in publisher_update_task
    ret = xmlrpcapi(api).publisherUpdate('/master', topic, pub_uris)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/xmlrpc/client.py", line 1112, in __call__
    return self.__send(self.__name, args)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/xmlrpc/client.py", line 1452, in __request
    verbose=self.__verbose
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/xmlrpc/client.py", line 1154, in request
    return self.single_request(host, handler, request_body, verbose)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/xmlrpc/client.py", line 1166, in single_request
    http_conn = self.send_request(host, handler, request_body, verbose)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/xmlrpc/client.py", line 1279, in send_request
    self.send_content(connection, request_body)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/xmlrpc/client.py", line 1309, in send_content
    connection.endheaders(request_body)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py", line 1224, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py", line 1055, in _send_output
    self.send(chunk)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py", line 977, in send
    self.sock.sendall(data)
BrokenPipeError: [Errno 32] Broken pipe

[dirk-thomas]

From this brief description it is unclear if this is actually a bug in the package or something different in your setup / environment. I would suggest to ask for help on answers.ros.org where more people will read about your problem and might be able to help.

[horagong]

I think it's the bug in ros_comm like #1357.
It is said to be fixed by #1393 but when I tested it, it didn't work with python3 on macOS.
So I am using ros_comm commit 46d5ba4. It's ok.