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