Bryan Cutler created ARROW-822:
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             Summary: [Python] StreamWriter fails to open with socket as sink
                 Key: ARROW-822
                 URL: https://issues.apache.org/jira/browse/ARROW-822
             Project: Apache Arrow
          Issue Type: Bug
            Reporter: Bryan Cutler


Trying to use pyarrow StreamWriter to write to a socket fails.  I've tried the 
following:

- Use socket directly and get "TypeError: Unable to read from object of type: 
<class 'socket._socketobject'>"
  looks like pyarrow expects the object to have a "write" attribute

- Using as a file object with: "sock.makefile("wb", 65536)" get the error 
"pyarrow.error.ArrowIOError: IOError: '_fileobject' object has no attribute 
'tell'"
  Not sure why exactly "tell" is required.

- using "os.fdopen(sock.fileno(), "wb", 65536)" get a rather cryptic error that 
I've been unable to track down:
  "terminate called after throwing an instance of 'std::logic_error' what():  
basic_string::_M_construct null not valid"
  Seems to indicate some kind of std::string construction with a NULL, but I 
can't find that anywhere



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