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https://issues.apache.org/jira/browse/CASSANDRA-15557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17051111#comment-17051111
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Ryan Svihla commented on CASSANDRA-15557:
-----------------------------------------

Yes silly me, easy enough to prove when setting the timestamps to the same 
value the tests still pass, and just to totally eliminate weird side effects, 
setting the timestamp in reverse breaks the test as expected so I don't think 
there is anything specific about setting the timestamp to any value that makes 
it pass. 

So I'm not sure I have a good theory as to why breaks in the first place. It 
does then act as if somehow the drop is happening "before" the insert. I'll 
keep digging thanks for the review.

> Fix flaky test org.apache.cassandra.cql3.validation.operations.AlterTest 
> testDropListAndAddListWithSameName
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-15557
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15557
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Test/unit
>            Reporter: David Capwell
>            Assignee: Ryan Svihla
>            Priority: Normal
>             Fix For: 4.0-alpha
>
>
> https://app.circleci.com/jobs/github/dcapwell/cassandra/482/tests
> {code}
> junit.framework.AssertionFailedError: Invalid value for row 0 column 2 
> (mycollection of type list<text>), expected <null> but got <[first element]>
>       at org.apache.cassandra.cql3.CQLTester.assertRows(CQLTester.java:1070)
>       at 
> org.apache.cassandra.cql3.validation.operations.AlterTest.testDropListAndAddListWithSameName(AlterTest.java:91)
> {code}



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