[ 
https://issues.apache.org/jira/browse/CASSANDRA-17651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17565874#comment-17565874
 ] 

Andres de la Peña commented on CASSANDRA-17651:
-----------------------------------------------

The failure can be reproduced on CircleCI with the test multiplexer:
{code}
.circleci/generate.sh -m \
  -e 
REPEATED_JVM_UPGRADE_DTEST_CLASS=org.apache.cassandra.distributed.upgrade.BatchUpgradeTest
 \
  -e REPEATED_JVM_UPGRADE_DTEST_COUNT=500
{code}
It seems to have [a flakiness of around 
1%|https://app.circleci.com/pipelines/github/adelapena/cassandra/1915/workflows/231a7018-df32-45d1-a1be-265d86922d39/jobs/19106].

The test [survives 500 
iterations|https://app.circleci.com/pipelines/github/adelapena/cassandra/1916/workflows/1b54b401-8ff3-4a48-b7a9-3ad14dfc97f6/jobs/19107]
 if we use {{spinAssertEquals}} to wait for the processing of the stored batch 
mutations, [this 
way|https://github.com/adelapena/cassandra/commit/ce9dfc06cbed0fef88b422a313fdcc73459d13ea].

> Fix flaky dtest - 
> org.apache.cassandra.distributed.upgrade.BatchUpgradeTest.batchTest 
> --------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-17651
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-17651
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Consistency/Batch Log
>            Reporter: Brandon Williams
>            Assignee: Brandon Williams
>            Priority: Normal
>             Fix For: 4.1-beta, 4.1.x
>
>
> {code}
> org.apache.cassandra.distributed.shared.ShutdownException: Uncaught 
> exceptions were thrown during test
>       at 
> org.apache.cassandra.distributed.impl.AbstractCluster.checkAndResetUncaughtExceptions(AbstractCluster.java:1056)
>       at 
> org.apache.cassandra.distributed.impl.AbstractCluster.close(AbstractCluster.java:1042)
>       at 
> org.apache.cassandra.distributed.upgrade.UpgradeTestBase$TestCase.run(UpgradeTestBase.java:239)
>       at 
> org.apache.cassandra.distributed.upgrade.BatchUpgradeTest.batchTest(BatchUpgradeTest.java:53)
>       Suppressed: java.lang.RuntimeException: java.lang.AssertionError
>               at 
> org.apache.cassandra.net.InboundSink.accept(InboundSink.java:108)
>               at 
> org.apache.cassandra.distributed.impl.Instance.lambda$null$6(Instance.java:495)
>               at 
> org.apache.cassandra.concurrent.ExecutionFailure$1.run(ExecutionFailure.java:124)
>               at 
> org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:120)
>               at 
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
>               at java.lang.Thread.run(Thread.java:748)
>       Caused by: java.lang.AssertionError
>               at 
> org.apache.cassandra.locator.TokenMetadata.firstTokenIndex(TokenMetadata.java:1171)
>               at 
> org.apache.cassandra.locator.TokenMetadata.firstToken(TokenMetadata.java:1185)
>               at 
> org.apache.cassandra.locator.AbstractReplicationStrategy.getNaturalReplicas(AbstractReplicationStrategy.java:95)
>               at 
> org.apache.cassandra.locator.AbstractReplicationStrategy.getLocalReplicaFor(AbstractReplicationStrategy.java:111)
>               at 
> org.apache.cassandra.db.ReadCommandVerbHandler.validateTransientStatus(ReadCommandVerbHandler.java:108)
>               at 
> org.apache.cassandra.db.ReadCommandVerbHandler.doVerb(ReadCommandVerbHandler.java:50)
>               at 
> org.apache.cassandra.net.InboundSink.lambda$new$0(InboundSink.java:78)
>               at 
> org.apache.cassandra.net.InboundSink.accept(InboundSink.java:97)
> {code}
> https://ci-cassandra.apache.org/job/Cassandra-4.1/34/testReport/org.apache.cassandra.distributed.upgrade/BatchUpgradeTest/batchTest/



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