Thanks - I will look into this. The reason for trying to get the python_cassandra package working is that I have a working site talking to a windows hosted version of Cassandra. I now want to move this to linux but cannot get the corresponding linux version (Unfortunately the windows machine was set up with a nightly release somewhere between 0.64 and 0.65!)
From: Tyler Hobbs [mailto:ty...@riptano.com] Sent: 09 November 2010 18:22 To: user@cassandra.apache.org Subject: Re: Cassandra - python communication problem I would recommend using pycassa 0.5.2 <http://github.com/pycassa/pycassa> for working with 0.7.0-beta3 in python. It's much nicer than raw Thrift, too :) - Tyler On Tue, Nov 9, 2010 at 12:19 PM, Jonathan Ellis <jbel...@gmail.com<mailto:jbel...@gmail.com>> wrote: python_cassandra-0.6.1 sure doesn't look like a package I'd expect to work with 0.7. On Tue, Nov 9, 2010 at 12:07 PM, Dr. Andrew Perella <a...@eutechnyx.com<mailto:a...@eutechnyx.com>> wrote: > Thanks Jonathan, > So it looks like the python bindings are using a deprecated non framed > protocol. Leaving that problem aside for a moment I changed the server to > work in non framed mode and now get a different error: > > > v...@vs001:~/apache-cassandra-0.7.0-beta3/interface/gen-py/cassandra$ > Cassandra-remote -h localhost:9160 describe_keyspace systemTraceback (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 1030, in recv_describe_keyspace > raise TApplicationException(TApplicationException.MISSING_RESULT, > "describe_keyspace failed: unknown result"); > thrift.Thrift.TApplicationException: describe_keyspace failed: unknown result > > Any ideas? > Cheers, > Andrew > > -----Original Message----- > From: Jonathan Ellis [mailto:jbel...@gmail.com<mailto:jbel...@gmail.com>] > Sent: 09 November 2010 17:56 > To: user > Subject: Re: Cassandra - python communication problem > > 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 > <a...@eutechnyx.com<mailto:a...@eutechnyx.com>> wrote: >> Hi, >> >> >> >> I have been trying to connect to Cassandra 0.7.0-beta3 via python to no >> avail: >> >> >> >> v...@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 >> >> >> >> >> >> This e-mail is confidential and may be privileged. It may be read, copied >> and used only by the intended recipient. No communication sent by e-mail to >> or from Eutechnyx is intended to give rise to contractual or other legal >> liability, apart from liability which cannot be excluded under English law. >> >> This email has been scanned for all known viruses by >> www.epagency.net<http://www.epagency.net>. >> >> www.eutechnyx.com<http://www.eutechnyx.com> Eutechnyx Limited. Registered in >> England No: 2172322 > > > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of Riptano, the source for professional Cassandra support > http://riptano.com > This email has been scanned for all known viruses by the Email Protection > Agency. > This e-mail is confidential and may be privileged. It may be read, copied and > used only by the intended recipient. No communication sent by e-mail to or > from Eutechnyx is intended to give rise to contractual or other legal > liability, apart from liability which cannot be excluded under English law. > > This email has been scanned for all known viruses by the Email Protection > Agency. http://www.epagency.net > > > www.eutechnyx.com<http://www.eutechnyx.com> Eutechnyx Limited. Registered in > England No: 2172322 > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com This email has been scanned for all known viruses by the Email Protection Agency This e-mail is confidential and may be privileged. It may be read, copied and used only by the intended recipient. No communication sent by e-mail to or from Eutechnyx is intended to give rise to contractual or other legal liability, apart from liability which cannot be excluded under English law. 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