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https://issues.apache.org/jira/browse/CASSANDRA-14659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16590152#comment-16590152
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Marcus Olsson commented on CASSANDRA-14659:
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[~djoshi3], sure, as I said I don't really have a strong opinion on this and I
think it would be useful as you said to have a test of client connections
before performing a major upgrade.
I haven't tested/verified the patches but I did glance over them and found a
few small things:
* In the nodetool command for
[DisableOldProtocolVersions|https://github.com/dineshjoshi/cassandra/blob/73f921d7f981f0be1efe688c6d02968eb784a15b/src/java/org/apache/cassandra/tools/nodetool/DisableOldProtocolVersions.java#L25]
the description is "Enable old protocol versions" rather than "Disable old
protocol versions".
* In the dtest I think it would be good to have a verification that it's still
possible to connect with the latest protocol version in between
disabling/enabling the feature.
> Disable old protocol versions on demand
> ---------------------------------------
>
> Key: CASSANDRA-14659
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14659
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Dinesh Joshi
> Assignee: Dinesh Joshi
> Priority: Major
> Labels: usability
>
> This patch allows the operators to disable older protocol versions on demand.
> To use it, you can set {{native_transport_allow_older_protocols}} to false or
> use nodetool disableolderprotocolversions. Cassandra will reject requests
> from client coming in on any version except the current version. This will
> help operators selectively reject connections from clients that do not
> support the latest protoocol.
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