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https://issues.apache.org/jira/browse/CASSANDRA-18564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17755688#comment-17755688
 ] 

Caleb Rackliffe commented on CASSANDRA-18564:
---------------------------------------------

Saw this today in a 5.0-based branch: 
[https://app.circleci.com/pipelines/github/adelapena/cassandra/3105/workflows/3cf378e2-999f-4d1b-afc4-d517ce0f77e0/jobs/67928/tests#failed-test-0]

> Test Failure: 
> MixedModeAvailabilityV3XAllOneTest.testAvailabilityCoordinatorUpgraded
> ------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-18564
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-18564
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Test/dtest/java
>            Reporter: Andres de la Peña
>            Priority: Normal
>
> The JVM upgrade dtest 
> {{MixedModeAvailabilityV3XAllOneTest.testAvailabilityCoordinatorUpgraded}} 
> seems to be flaky at least in {{trunk}}:
> {code}
> junit.framework.AssertionFailedError: Error in test '4.0.11 -> [5.0]' while 
> upgrading to '5.0'; successful upgrades []
>       at 
> org.apache.cassandra.distributed.upgrade.UpgradeTestBase$TestCase.run(UpgradeTestBase.java:348)
>       at 
> org.apache.cassandra.distributed.upgrade.MixedModeAvailabilityTestBase.testAvailability(MixedModeAvailabilityTestBase.java:154)
>       at 
> org.apache.cassandra.distributed.upgrade.MixedModeAvailabilityTestBase.testAvailabilityCoordinatorUpgraded(MixedModeAvailabilityTestBase.java:74)
> Caused by: java.lang.AssertionError: Unexpected error while reading in case 
> write-read consistency ALL-ONE with upgraded coordinator and 2 nodes down: 
> org.apache.cassandra.exceptions.ReadTimeoutException: Operation timed out - 
> received only 0 responses.
>       at 
> org.apache.cassandra.distributed.upgrade.MixedModeAvailabilityTestBase.lambda$testAvailability$6(MixedModeAvailabilityTestBase.java:145)
>       at 
> org.apache.cassandra.distributed.upgrade.UpgradeTestBase$TestCase.run(UpgradeTestBase.java:339)
> Caused by: org.apache.cassandra.exceptions.ReadTimeoutException: Operation 
> timed out - received only 0 responses.
>       at 
> org.apache.cassandra.service.reads.ReadCallback.awaitResults(ReadCallback.java:162)
>       at 
> org.apache.cassandra.service.reads.AbstractReadExecutor.awaitResponses(AbstractReadExecutor.java:387)
>       at 
> org.apache.cassandra.service.StorageProxy.fetchRows(StorageProxy.java:2124)
>       at 
> org.apache.cassandra.service.StorageProxy.readRegular(StorageProxy.java:1995)
>       at 
> org.apache.cassandra.service.StorageProxy.read(StorageProxy.java:1873)
>       at 
> org.apache.cassandra.db.SinglePartitionReadCommand$Group.execute(SinglePartitionReadCommand.java:1286)
>       at 
> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:364)
>       at 
> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:293)
>       at 
> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:105)
>       at 
> org.apache.cassandra.distributed.impl.Coordinator.unsafeExecuteInternal(Coordinator.java:122)
>       at 
> org.apache.cassandra.distributed.impl.Coordinator.unsafeExecuteInternal(Coordinator.java:103)
>       at 
> org.apache.cassandra.distributed.impl.Coordinator.lambda$executeWithResult$0(Coordinator.java:66)
>       at org.apache.cassandra.concurrent.FutureTask.call(FutureTask.java:61)
>       at org.apache.cassandra.concurrent.FutureTask.run(FutureTask.java:71)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>       at 
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
>       at java.lang.Thread.run(Thread.java:750)
> {code}
> This has failed 143 times in 500 iterations of this CircleCI run:
> * 
> https://app.circleci.com/pipelines/github/adelapena/cassandra/2927/workflows/fcd1cd60-826b-484a-8e81-d3ba640f7de9/jobs/47659/tests
> The failure has also recently appeared on Jenkins too:
> * 
> https://ci-cassandra.apache.org/job/Cassandra-trunk/1585/testReport/org.apache.cassandra.distributed.upgrade/MixedModeAvailabilityV3XAllOneTest/testAvailabilityCoordinatorUpgraded__jdk11/
> Given that the failure has just appeared on Jenkins and it fails relatively 
> easily on CircleCI, it's likely that it has been broken by a very recent 
> change.



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