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https://issues.apache.org/jira/browse/CASSANDRA-21500?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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C. Scott Andreas reassigned CASSANDRA-21500:
--------------------------------------------
Assignee: Benedict Elliott Smith
> Flaky test: AccordCQLTestBase#testCASSimulatorLite
> --------------------------------------------------
>
> Key: CASSANDRA-21500
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21500
> Project: Apache Cassandra
> Issue Type: Bug
> Components: Accord
> Reporter: C. Scott Andreas
> Assignee: Benedict Elliott Smith
> Priority: Normal
>
> {{AccordCQLTestBase.testCASSimulatorLite}} fires N concurrent CAS ({{{}UPDATE
> ... IF EXISTS{}}}) at {{CL=ALL}} on a single key through Accord in a 2-node
> cluster, then asserts the two appended columns stay in lockstep. The ten-way
> contention produced in this test fails pretty often in CI with a
> WriteTimeoutException.
> Reducing the concurrency of this CAS test from 10 to 4 prevents this test
> from flaking in CI.
> Additional details and flakiness stats at varied levels of concurrency
> (model-assisted): [https://github.com/cscotta/cassandra/pull/9]
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