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https://issues.apache.org/jira/browse/CASSANDRA-19026?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17787285#comment-17787285
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Jacek Lewandowski commented on CASSANDRA-19026:
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Async cleanup was a source of flakiness. The speedup comes from other changes
like avoiding unnecessary flushes.
> Do not drop CQLTester.KEYSPACE content in @After asynchronously
> ---------------------------------------------------------------
>
> Key: CASSANDRA-19026
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19026
> Project: Cassandra
> Issue Type: Task
> Components: Test/unit
> Reporter: Jacek Lewandowski
> Assignee: Jacek Lewandowski
> Priority: Normal
> Fix For: 4.0.x, 4.1.x, 5.0.x, 5.1
>
>
> CASSANDRA-18710 showed that removal of tables, views, functions, etc. in
> {{@After}} method asynchronously may span the next test case and modify that
> test behaviour in some unexpected way
> Concretely, {{@After}} method includes dropping {{KEYSPACE_PER_TEST}}
> synchronously and the whole content of {{KEYSPACE}} asynchronously. I don't
> see a reason for dropping the content of {{KEYSPACE}} after each test because
> that keyspace is not expected to be clean for each test case. It is the case
> for {{KEYSPACE_PER_TEST}}. Therefore I propose removal of that async cleanup
> of {{KEYSPACE}} after each test case.
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