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https://issues.apache.org/jira/browse/CASSANDRA-15996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17214434#comment-17214434
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Berenguer Blasi commented on CASSANDRA-15996:
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The only 2 things that came to my mind are:
- On node start, instead of relying on the patient cql connection, lets add 
flags to wait for the binary protocol and other startup stuff to complete i.e . 
But this is just a stab in the dark based on previous experience fixing tests. 
Just in case there is some esoteric race at startup.
- {{NoSpamLogger}} has some shuffling of instances around that _maybe_ have a 
concurrency hole, _maybe_ I am just imagining things. I have to look at it for 
a while a bit longer to make up my mind. In any case I didn't see how that 
could affect in this particular case were usage is pretty straightforward and 
not multithreaded. So I am also at a loss here so far as well.



> Fix flaky python dtest test_expiration_overflow_policy_capnowarn - 
> ttl_test.TestTTL
> -----------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-15996
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15996
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Test/dtest/python
>            Reporter: David Capwell
>            Assignee: Adam Holmberg
>            Priority: Normal
>             Fix For: 3.11.x, 4.0-beta
>
>
> https://app.circleci.com/pipelines/github/dcapwell/cassandra/361/workflows/3a42fa45-1f60-4c95-86a4-15a6773e384e/jobs/1860
> {code}
> >           assert warning, 'Log message should be print for CAP and 
> > CAP_NOWARN policy'
> E           AssertionError: Log message should be print for CAP and 
> CAP_NOWARN policy
> E           assert []
> {code}



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