Thanks Lars. So it sounds like this might be an issue with Python itself rather than the way the Python code for Thrift in TSocket.open() interprets "localhost".
-----Original Message----- From: Lars Benner [mailto:[email protected]] Sent: 29 April 2014 11:28 To: [email protected] Subject: RE: Python clients can't connect to Thrift services running on "localhost" when no network connection is available Hi Lucas, I came across a similar issue in a completely different area (TCP/IP connection between Qt and Ruby). Depending on the language and the available IP stacks, localhost can be resolved to an IPv4 (normally 127.0.0.1) or IPv6 (normally ::1) address. Connecting from one to other does not work. I also know no better solution than using '127.0.0.1' for ensuring an IPv4 connection. Best Regards, - Lars -----Original Message----- From: Partridge, Lucas (GE Aviation) [mailto:[email protected]] Sent: Tuesday, April 29, 2014 11:24 AM To: [email protected] Subject: Python clients can't connect to Thrift services running on "localhost" when no network connection is available I'm not sure whether this is a bug or something different between Java and Python but I thought other people might like to know this... I had a Thrift 0.9.0 service running on my local machine in C#. Java clients to this service could connect using "localhost" even when no network connection was available but Python clients failed with: File "C:\Python27\lib\site-packages\thrift-0.9.0-py2.7.egg\thrift\transport\TSocket.py", line 99, in open message=message) thrift.transport.TTransport.TTransportException: Could not connect to localhost:9092 The workaround is to use "127.0.0.1" in Python clients. This is not necessary for Java clients. Python test script: from thrift.transport import TSocket #host = "127.0.0.1" # Works host = "localhost" # Fails when no network connection is available port = 9092 transp = TSocket.TSocket(host, port) transp.open() print 'Transport opened' transp.close() print 'Transport closed' The Java equivalent runs fine, however: TTransport transport = new TSocket("localhost", 9092); try { transport.open(); // Works even if no network connection is available. ... Thanks, Lucas.
