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https://issues.apache.org/jira/browse/SOLR-13584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16875475#comment-16875475
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Andrzej Bialecki commented on SOLR-13584:
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We've tried implementing a true RENAME by actually renaming the collection
state, configs, cores, etc ... it proved to be a lot of hassle, it took many
tricky steps to do it and one failed step could have caused a permanent data
loss - so in the end the solution with an alias was the only sensible way to do
this.
bq. a graceful way for users to get themselves out
The use case that you outlined IS the primary reason for using aliases - if we
remove this ability then we might as well remove aliases altogether.
> Explore prohibiting aliases and collections from having the same name.
> ----------------------------------------------------------------------
>
> Key: SOLR-13584
> URL: https://issues.apache.org/jira/browse/SOLR-13584
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Erick Erickson
> Priority: Major
>
> Allowing aliases and collections to have the same name is fragile and a
> potentially a data issue. I'll link in a few JIRAs illustrating this and one
> at least where the discussion gets long.
> Straw-man proposal to start things off.
> Deprecate this ability now, and enforce it in 9.0.
> We have to provide a graceful way for users to get themselves out of the
> following currently-possible use-case.
> * a collection C1 is created and all the front-end uses it.
> * users want to atomically switch to a new collection for various reasons
> * users create C2 and test it out.
> * users create an alias C1->C2
> Let's discuss.
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