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https://issues.apache.org/jira/browse/SOLR-11988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16364983#comment-16364983
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Hoss Man commented on SOLR-11988:
---------------------------------

Note: with {{useFactory(null);}} added to 
{{FullSolrCloudDistribCmdsTest.beforeSuperClass()}} I can't get this seed to 
fail at all ... suggesting that MockDirectoryFactory is *almost certainly* the 
problem.



> FullSolrCloudDistribCmdsTest failures due to SolrCore initializating 
> incorrectly thinking index directory already exists?
> -------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-11988
>                 URL: https://issues.apache.org/jira/browse/SOLR-11988
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Hoss Man
>            Priority: Major
>         Attachments: SOLR-11988_nocommit_logging.patch, log.txt
>
>
> There's been quite a few jenkins failures from FullSolrCloudDistribCmdsTest 
> that all seem to follow a similar pattern:
>  * Failure manifests as "Could not find collection:collection2"
>  * Failing seeds _frequently_ reproduce, but aren't guaranteed to
>  * Root cause can be traced back to the collection creation failing because 
> one of more replica cores failed due to the brand new (Solr)IndexWriter 
> expects to find an existing segments file
>  ** SolrCore should have already created an (empty) index in 
> {{SolrCore.initIndex(...)}}
>  ** The fact that the {{SolrIndexWrite}} throws this exception in it's 
> constructor suggests that the earlier call to {{SolrCore.initIndex(...)}} is 
> not functioning reliably
>  ** Based on some experimenting i've done, it seems like the underlying 
> problem is that in {{SolrCore.initIndex(...)}} the DirectoryFactory can "lie" 
> about wether a directory already exists.
> More details to follow in comments.



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