Marcus Olsson created CASSANDRA-9474:
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Summary: DC/Rack property changed on live system
Key: CASSANDRA-9474
URL: https://issues.apache.org/jira/browse/CASSANDRA-9474
Project: Cassandra
Issue Type: Bug
Components: Core
Environment: Cassandra 2.1.5
Reporter: Marcus Olsson
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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