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https://issues.apache.org/jira/browse/SOLR-12889?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16658014#comment-16658014
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Shawn Heisey commented on SOLR-12889:
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The last part of the proposal, removing initFailures and just including failed
cores in the regular core list, probably needs to be a master-only change.
> Clean up CoreAdmin behavior and responses when acting on cores that failed to
> initialize
> ----------------------------------------------------------------------------------------
>
> Key: SOLR-12889
> URL: https://issues.apache.org/jira/browse/SOLR-12889
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 7.5
> Reporter: Shawn Heisey
> Priority: Minor
>
> Solr isn't behaving quite correctly when performing CoreAdmin actions on
> cores that exist, but failed to initialize.
> * RELOAD works. That was made possible by SOLR-10021.
> * UNLOAD works, and can even delete directories if asked to.
> * RENAME works, but Solr must be restarted for the admin UI to reflect the
> new name in the "SolrCore Initialization Failures" message.
> * SWAP doesn't actually work, but returns a response that *LOOKS* like it
> worked.
> I didn't try the other actions, because it doesn't really make any sense to
> allow those on a core that failed.
> What I see as things that need to be checked or implemented when acting on
> failed cores:
> * SWAP
> ** Fail fast.
> ** OR make it work properly. If we choose this, adjust the core name in the
> initFailures part of the STATUS response.
> * RENAME
> ** Fail fast.
> ** OR make it work properly. If we choose this, adjust the core name in the
> initFailures part of the STATUS response.
> * UNLOAD
> ** This looks like it behaves correctly. Tried it with
> deleteInstanceDir=true and it did wipe out the whole core.
> * Other actions not already mentioned
> ** Fail fast
> Something else to consider: Get rid of the initFailures part of the STATUS
> response. List all cores, even those that failed. Include a boolean item in
> the response to indicate whether initialization succeeded, and only list some
> of the full information for a failed core. This would make implementing
> SOLR-12863 easier.
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