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https://issues.apache.org/jira/browse/SOLR-9934?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hoss Man resolved SOLR-9934.
----------------------------
       Resolution: Fixed
    Fix Version/s: 6.4
                   master (7.0)

> SolrTestCase.clearIndex should ensure IndexWriter.deleteAll is called
> ---------------------------------------------------------------------
>
>                 Key: SOLR-9934
>                 URL: https://issues.apache.org/jira/browse/SOLR-9934
>             Project: Solr
>          Issue Type: Test
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Hoss Man
>            Assignee: Hoss Man
>             Fix For: master (7.0), 6.4
>
>         Attachments: SOLR-9934.patch
>
>
> Normal deleteByQuery commands are subject to version constraint checks due to 
> the possibility of out of order updates, but DUH2 has special support 
> (triggered by {{version=-Long.MAX_VALUE}} for use by tests to override these 
> version constraints and do a low level {{IndexWriter.deleteAll()}} call.  A 
> handful of tests override {{SolrTestCaseJ4.clearIndex()}} to take advantage 
> of this (using copy/pasted impls), but given the intended purpose/usage of 
> {{SolrTestCaseJ4.clearIndex()}}, it seems like the the base method in 
> {{SolrTestCaseJ4}} should itself trigger this low level deletion, so tests 
> get this behavior automatically.



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