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https://issues.apache.org/jira/browse/CASSANDRA-17478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17512550#comment-17512550
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Jon Meredith commented on CASSANDRA-17478:
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+1 with recommendation to re-instate cleaning up DCs with RF 0 that's fine for
commit time.
> Disallow removal of a DC from system_auth replication settings
> --------------------------------------------------------------
>
> Key: CASSANDRA-17478
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17478
> Project: Cassandra
> Issue Type: Improvement
> Components: Feature/Authorization
> Reporter: Josh McKenzie
> Assignee: Josh McKenzie
> Priority: Normal
> Time Spent: 10m
> Remaining Estimate: 0h
>
> It's never correct for an operator to remove a DC from system_auth
> replication settings while there are currently nodes up in that DC. We should
> disallow the ability to manually make this change, as if you need to
> decommission a DC you need to remove all the nodes from the cluster before
> allowing the replication settings change on system_auth.
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