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https://issues.apache.org/jira/browse/CASSANDRA-9474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paulo Motta updated CASSANDRA-9474:
-----------------------------------
Fix Version/s: 3.0.x
2.2.x
3.2
3.1
Summary: Validate dc information on startup (was: DC/Rack property
changed on live system)
> Validate dc information on startup
> ----------------------------------
>
> Key: CASSANDRA-9474
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9474
> Project: Cassandra
> Issue Type: Improvement
> Environment: Cassandra 2.1.5
> Reporter: Marcus Olsson
> Assignee: Marcus Olsson
> Fix For: 3.1, 3.2, 2.1.x, 2.2.x, 3.0.x
>
> Attachments: CASSANDRA-9474-2.2.patch, CASSANDRA-9474-dtest.patch,
> CASSANDRA-9474-trunk.patch, cassandra-2.1-9474.patch,
> cassandra-2.1-dc_rack_healthcheck.patch
>
>
> When using GossipingPropertyFileSnitch it is possible to change the data
> center and rack of a live node by changing the cassandra-rackdc.properties
> file. Should this really be possible? In the documentation at
> http://docs.datastax.com/en/cassandra/2.1/cassandra/initialize/initializeMultipleDS.html
> it's stated that you should ??Choose the name carefully; renaming a data
> center is not possible??, but with this functionality it doesn't seem
> impossible(maybe a bit hard with changing replication etc.).
> This functionality was introduced by CASSANDRA-5897 so I'm guessing there is
> some use case for this?
> Personally I would want the DC/rack settings to be as restricted as the
> cluster name, otherwise if a node could just join another data center without
> removing it's local information couldn't it mess up the token ranges? And
> suddenly the old data center/rack would loose 1 replica of all the data that
> the node contains.
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