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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Cassandra - python communication problem
Date Tue, 09 Nov 2010 17:55:32 GMT
You're using an unframed transport to talk to a framed server, or vice versa.

On Tue, Nov 9, 2010 at 11:47 AM, Dr. Andrew Perella <ajp@eutechnyx.com> wrote:
> Hi,
>
>
>
> I have been trying to connect to Cassandra 0.7.0-beta3 via python to no
> avail:
>
>
>
> vu@vs001:~/apache-cassandra-0.7.0-beta3/interface/gen-py/cassandra$
> Cassandra-remote  -h localhost:9160 describe_keyspace system
>
> Traceback (most recent call last):
>
>   File "/usr/local/bin/Cassandra-remote", line 5, in <module>
>
>     pkg_resources.run_script('python-cassandra==0.6.1', 'Cassandra-remote')
>
>   File "/usr/lib/python2.6/dist-packages/pkg_resources.py", line 461, in
> run_script
>
>     self.require(requires)[0].run_script(script_name, ns)
>
>   File "/usr/lib/python2.6/dist-packages/pkg_resources.py", line 1194, in
> run_script
>
>     execfile(script_filename, namespace, namespace)
>
>   File
> "/usr/local/lib/python2.6/dist-packages/python_cassandra-0.6.1-py2.6.egg/EGG-INFO/scripts/Cassandra-remote",
> line 204, in <module>
>
>     pp.pprint(client.describe_keyspace(args[0],))
>
>   File
> "/usr/local/lib/python2.6/dist-packages/python_cassandra-0.6.1-py2.6.egg/cassandra/Cassandra.py",
> line 1006, in describe_keyspace
>
>     return self.recv_describe_keyspace()
>
>   File
> "/usr/local/lib/python2.6/dist-packages/python_cassandra-0.6.1-py2.6.egg/cassandra/Cassandra.py",
> line 1017, in recv_describe_keyspace
>
>     (fname, mtype, rseqid) = self._iprot.readMessageBegin()
>
>   File
> "/usr/local/lib/python2.6/dist-packages/Thrift-0.2.0-py2.6-linux-x86_64.egg/thrift/protocol/TBinaryProtocol.py",
> line 126, in readMessageBegin
>
>     sz = self.readI32()
>
>   File
> "/usr/local/lib/python2.6/dist-packages/Thrift-0.2.0-py2.6-linux-x86_64.egg/thrift/protocol/TBinaryProtocol.py",
> line 203, in readI32
>
>     buff = self.trans.readAll(4)
>
>   File
> "/usr/local/lib/python2.6/dist-packages/Thrift-0.2.0-py2.6-linux-x86_64.egg/thrift/transport/TTransport.py",
> line 58, in readAll
>
>     chunk = self.read(sz-have)
>
>   File
> "/usr/local/lib/python2.6/dist-packages/Thrift-0.2.0-py2.6-linux-x86_64.egg/thrift/transport/TTransport.py",
> line 155, in read
>
>     self.__rbuf = StringIO(self.__trans.read(max(sz, self.DEFAULT_BUFFER)))
>
>   File
> "/usr/local/lib/python2.6/dist-packages/Thrift-0.2.0-py2.6-linux-x86_64.egg/thrift/transport/TSocket.py",
> line 94, in read
>
>     raise TTransportException(type=TTransportException.END_OF_FILE,
> message='TSocket read 0 bytes')
>
> thrift.transport.TTransport.TTransportException: TSocket read 0 bytes
>
>
>
> I get similar errors for all queries.
>
>
>
> I cannot work out what is going wrong here. Can anyone help? (I need many of
> the functions only added in 0.7)
>
>
>
> Best Regards,
>
> Andrew
>
>
>
>
>
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-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com

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