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https://issues.apache.org/jira/browse/CASSANDRA-17039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17442983#comment-17442983
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Caleb Rackliffe commented on CASSANDRA-17039:
---------------------------------------------

It looks like the differences in jamm's measurements between J8 and J11 are all 
around the {{ClassLoader}} reference {{contextClassLoader}} in 
{{NamedThreadFactory}}. That object graph appears to have expanded in J11.

 [^j8-threadfactory]  [^j11-threadfactory] 

> RepairJobTest.testNoTreesRetainedAfterDifference fails consistently on Java 11
> ------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-17039
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-17039
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Consistency/Repair
>            Reporter: Brandon Williams
>            Assignee: Caleb Rackliffe
>            Priority: Normal
>             Fix For: 4.1
>
>         Attachments: j11-threadfactory, j8-threadfactory
>
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> Sometimes fails an assertion:
> {noformat}
> Expecting:
>  <10000L>
> to be less than:
>  <10000L> 
> {noformat}
> https://app.circleci.com/pipelines/github/driftx/cassandra/269/workflows/f2b0a738-0785-4011-9ac1-071837dc9170/jobs/2049/tests#failed-test-1



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