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https://issues.apache.org/jira/browse/LUCENE-10071?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17406244#comment-17406244
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Michael McCandless commented on LUCENE-10071:
---------------------------------------------

Ideally we would be able to sometimes use concurrency in{{CheckIndex}} from MDW 
in tests.

> Review and refactor synchronization handling between MockDirectoryWrapper and 
> CheckIndex
> ----------------------------------------------------------------------------------------
>
>                 Key: LUCENE-10071
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10071
>             Project: Lucene - Core
>          Issue Type: Task
>          Components: core/index, modules/test-framework
>            Reporter: Zach Chen
>            Priority: Minor
>
> This is a spin-off issue from discussion in 
> [https://github.com/apache/lucene/pull/128,] as we noticed there's a subtle 
> way to cause deadlock in test (or maybe even in production code if similar 
> logic is implemented) 
> [https://github.com/apache/lucene/pull/128#discussion_r642639399.] 
> This issue is to review how synchronization can be improved between these 
> classes to make it less deadlock-prone, or more explicit when locking 
> arrangement needs to be made.  



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