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https://issues.apache.org/jira/browse/SOLR-10121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15864343#comment-15864343
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Yonik Seeley commented on SOLR-10121:
-------------------------------------

Hmmm, so on further review of BlockCache.java, I think I've found 2 concurrency 
issues.
Unfortunately, fixing those issues does not get my test to pass.
Another "issue" is that my test did pass pre-Caffeine, which means the test is 
not good enough at sussing out issues (since the BlockCache bugs I identified 
should not depend on the underlying map implementation).

> BlockCache corruption with high concurrency
> -------------------------------------------
>
>                 Key: SOLR-10121
>                 URL: https://issues.apache.org/jira/browse/SOLR-10121
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Yonik Seeley
>            Assignee: Yonik Seeley
>
> Improving the tests of the BlockCache in SOLR-10116 uncovered a corruption 
> bug (either that or the test is flawed... TBD).
> The failing test is TestBlockCache.testBlockCacheConcurrent()



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