This is not really supported. Presently cqlsh hard-codes CQL and protocol to versions only supported in 2.1: https://github.com/apache/cassandra/blob/cassandra-2.1.0/bin/cqlsh#L144-L147
Your best bet is probably downloading a 2.0.x tarball and running out of there. Adam Holmberg On Wed, Sep 17, 2014 at 4:33 PM, Tyler Tolley <thattolley...@gmail.com> wrote: > Just upgraded cassandra to 2.1 on my own box and when I try to connect to > our server running 2.0.7, I get the following error. > > Connection error: ('Unable to connect to any servers', {'10.0.16.144': > ConnectionShutdown('Connection <AsyncoreConnection(25708560) > 10.0.16.144:9042 (closed)> is already closed',)}) > > With debug on I get the following output. > > Using CQL driver: <module 'cassandra' from > '/usr/share/cassandra/lib/cassandra-driver-internal-only-2.1.0.post.zip/cassandra-driver-2.1.0.post/cassandra/__init__.py'> > Connection error: ('Unable to connect to any servers', {'10.0.16.144': > ConnectionShutdown('Connection <AsyncoreConnection(26384400) > 10.0.16.144:9042 (closed)> is already closed',)}) > > If I try to connect using an earlier version of cqlsh, it connects fine. > Anyone seen this before or have any advice on how to dig into the problem > further? Thanks, > -Tyler > >