[jira] [Created] (SOLR-12261) Deleting collections should sync aliases before prematurely failing when alias is deleted

["David Smiley (JIRA)" <ji...@apache.org>]

David Smiley created SOLR-12261:
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             Summary: Deleting collections should sync aliases before prematurely failing when alias is deleted
                 Key: SOLR-12261
                 URL: https://issues.apache.org/jira/browse/SOLR-12261
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
          Components: SolrCloud
            Reporter: David Smiley
            Assignee: David Smiley


In SOLR-11218 [~erickerickson] ensured that we can't delete a collection that is referenced by an alias. However It may be that the alias is deleted but the node servicing the request doesn't know about this yet. It should call AliasesManager.update() first (which now sync()'s with ZK).

I believe this is the cause of some sporadic failures to org.apache.solr.cloud.AliasIntegrationTest#tearDown which deletes the alias then all collections.

It's debatable if this is an improvement or a bug. Sadly most of SolrCloud simply seems to operate this way despite it being eventually consistent. Thus users using SolrCloud may have to add sleep()s after calls to Solr admin calls :-/



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