[jira] [Created] (CASSANDRA-18065) Flaky test org.apache.cassandra.tools.TopPartitionsTest#testStartAndStopScheduledSampling

["Andres de la Peña (Jira)" <ji...@apache.org>]

Andres de la Peña created CASSANDRA-18065:
---------------------------------------------

             Summary: Flaky test org.apache.cassandra.tools.TopPartitionsTest#testStartAndStopScheduledSampling
                 Key: CASSANDRA-18065
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-18065
             Project: Cassandra
          Issue Type: Bug
            Reporter: Andres de la Peña


The test {{org.apache.cassandra.tools.TopPartitionsTest#testStartAndStopScheduledSampling}} is fails intermittently on trunk with CircleCI:
* https://app.circleci.com/pipelines/github/adelapena/cassandra/2508/workflows/92f054d7-9386-498f-9ba4-330181cd4782/jobs/24692
* https://app.circleci.com/pipelines/github/adelapena/cassandra/2511/workflows/7aba8baa-0a6d-404a-b08b-c6a8078caca3/jobs/24706/tests

The failure looks like:
{code}
junit.framework.AssertionFailedError: Scheduled sampled tasks should be removed expected:<[]> but was:<[*.*]>
	at org.apache.cassandra.tools.TopPartitionsTest.testStartAndStopScheduledSampling(TopPartitionsTest.java:116)
{code}
I haven't seen this failure on Butler/Jenkins yet, but it can be reproduced with the CircleCI multiplexer:
{code}
.circleci/generate.sh -m \
  -e REPEATED_UTESTS_COUNT=2000 \
  -e REPEATED_UTESTS=org.apache.cassandra.tools.TopPartitionsTest
{code}
It seems to fail 11 times on 2000 runs.



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