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https://issues.apache.org/jira/browse/CASSANDRA-2882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13135558#comment-13135558
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Patricio Echague commented on CASSANDRA-2882:
---------------------------------------------
In a cluster of 2 nodes (RF = 1), when invoking describe_ring I get (as
expected) two TokenRange entities where one of them has EndpointDetails empty
and the other one (the seed) has actually some info with DC = null.
Is this exptected ?
{code}
TokenRange(start_token:39635973474216269529792835485919948635,
end_token:50000400412763488628260866807373889368, endpoints:[127.0.0.2],
rpc_endpoints:[127.0.0.2], endpoint_details:[])
TokenRange(start_token:50000400412763488628260866807373889368,
end_token:39635973474216269529792835485919948635, endpoints:[127.0.0.1],
rpc_endpoints:[127.0.0.1], endpoint_details:[EndpointDetails(host:127.0.0.1,
port:9160, datacenter:null)])
{code}
> describe_ring should include datacenter/topology information
> ------------------------------------------------------------
>
> Key: CASSANDRA-2882
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2882
> Project: Cassandra
> Issue Type: Improvement
> Components: API, Core
> Reporter: Mark Guzman
> Assignee: Mark Guzman
> Priority: Minor
> Labels: lhf
> Fix For: 1.0.1
>
> Attachments: 0001-CASSANDRA-2882-feedback-changes.patch,
> 0001-CASSANDRA-2882-patch-w-o-generated-files.patch,
> 0001-CASSANDRA-2882-rebased.patch,
> 0001-added-the-host-addr-to-the-EndpointDetail-class.-det.patch,
> 0001-adding-an-additional-parameter-to-the-TokenRange-res.patch,
> 0001-final-cleaned-up-2882-changes.patch
>
>
> describe_ring is great for getting a list of nodes in the cluster, but it
> doesn't provide any information about the network topology which prevents
> it's use in a multi-dc setup. It would be nice if we added another list to
> the TokenRange object containing the DC information.
> Optimally I could have ask any Cassandra node for this information and on the
> client-side prefer local nodes but be able to fail to remote nodes without
> requiring another lookup.
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