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https://issues.apache.org/jira/browse/CASSANDRA-9467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14557368#comment-14557368
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Aleksey Yeschenko commented on CASSANDRA-9467:
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To expand a little - protocol version is not the issue. Stuff like schema table
change, and there is no guarantee that a driver bundled with 2.1 would be able
to work properly with C* 2.2. same protocol version or not.
> cqlsh does not connect to older protocol versions
> -------------------------------------------------
>
> Key: CASSANDRA-9467
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9467
> Project: Cassandra
> Issue Type: Improvement
> Environment: 2.2rc1 against 2.1 / 2.0
> Reporter: Robert Stupp
> Assignee: Stefania
> Priority: Minor
> Labels: cqlsh
> Fix For: 3.x
>
>
> {{cqlsh}} (from curent 2.2 branch) does no longer work against C* 2.1 and 2.0.
> {code}
> bin/cqlsh
> Connection error: ('Unable to connect to any servers', {'127.0.0.1':
> ConnectionException('Did not get expected SupportedMessage response; instead,
> got: Server protocol version (3) does not match the specified driver protocol
> version (4). Consider setting Cluster.protocol_version to 3.',)})
> {code}
> Related to CASSANDRA-9399 ?
> /cc [~stefania_alborghetti]
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