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https://issues.apache.org/jira/browse/CASSANDRA-17461?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17606771#comment-17606771
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Blake Eggleston commented on CASSANDRA-17461:
---------------------------------------------
{quote}I feel like this weakens the tests{quote}
How so? We're interested in whether the paxos operation updates the ring, and
doesn't complete operations with stale topology, which this still tests. The
tests all fail with v1, as expected.
> Test Failure:
> org.apache.cassandra.distributed.test.CASTest.testConflictingWritesWithStaleRingInformation
> ---------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-17461
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17461
> Project: Cassandra
> Issue Type: Bug
> Components: Test/dtest/java
> Reporter: Andres de la Peña
> Assignee: Blake Eggleston
> Priority: Normal
> Fix For: 4.1-beta, 4.x
>
>
> Intermittent failures on {{org.apache.cassandra.distributed.test.CASTest}}
> for trunk:
> *
> [testConflictingWritesWithStaleRingInformation|https://ci-cassandra.apache.org/job/Cassandra-trunk/1024/testReport/org.apache.cassandra.distributed.test/CASTest/testConflictingWritesWithStaleRingInformation_3/]
> *
> [testSuccessfulWriteBeforeRangeMovement|https://ci-cassandra.apache.org/job/Cassandra-trunk/1025/testReport/org.apache.cassandra.distributed.test/CASTest/testSuccessfulWriteBeforeRangeMovement/]
> *
> [testSuccessfulWriteDuringRangeMovementFollowedByConflicting|https://ci-cassandra.apache.org/job/Cassandra-trunk/1020/testReport/org.apache.cassandra.distributed.test/CASTest/testSuccessfulWriteDuringRangeMovementFollowedByConflicting/]
> *
> [testSucccessfulWriteDuringRangeMovementFollowedByRead|https://ci-cassandra.apache.org/job/Cassandra-trunk/1020/testReport/org.apache.cassandra.distributed.test/CASTest/testSucccessfulWriteDuringRangeMovementFollowedByRead/]
> All four seem to have the same aspect:
> {code}
> Failed 2 times in the last 5 runs. Flakiness: 50%, Stability: 60%
> Error Message
> CAS operation timed out: received 1 of 2 required responses after 0
> contention retries
> Stacktrace
> org.apache.cassandra.exceptions.CasWriteTimeoutException: CAS operation timed
> out: received 1 of 2 required responses after 0 contention retries
> at
> org.apache.cassandra.service.paxos.Paxos$MaybeFailure.markAndThrowAsTimeoutOrFailure(Paxos.java:547)
> at org.apache.cassandra.service.paxos.Paxos.begin(Paxos.java:1048)
> at org.apache.cassandra.service.paxos.Paxos.cas(Paxos.java:659)
> at org.apache.cassandra.service.paxos.Paxos.cas(Paxos.java:618)
> at org.apache.cassandra.service.StorageProxy.cas(StorageProxy.java:307)
> at
> org.apache.cassandra.cql3.statements.ModificationStatement.executeWithCondition(ModificationStatement.java:500)
> at
> org.apache.cassandra.cql3.statements.ModificationStatement.execute(ModificationStatement.java:467)
> at
> org.apache.cassandra.distributed.impl.Coordinator.unsafeExecuteInternal(Coordinator.java:122)
> at
> org.apache.cassandra.distributed.impl.Coordinator.unsafeExecuteInternal(Coordinator.java:103)
> at
> org.apache.cassandra.distributed.impl.Coordinator.lambda$executeWithResult$0(Coordinator.java:66)
> at org.apache.cassandra.concurrent.FutureTask.call(FutureTask.java:47)
> at org.apache.cassandra.concurrent.FutureTask.run(FutureTask.java:57)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> at
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> at java.base/java.lang.Thread.run(Thread.java:829)
> Standard Output
> DEBUG [main] 2022-03-19 16:20:42,868 Reflections.java:198 - going to scan
> these urls:
> [jar:file:/home/cassandra/cassandra/build/apache-cassandra-4.1-SNAPSHOT.jar!/,
>
> jar:file:/home/cassandra/cassandra/build/test/lib/jars/simulator-bootstrap.jar!/,
>
> jar:file:/home/cassandra/cassandra/build/test/lib/jars/dtest-api-0.0.12.jar!/,
> file:/home/cassandra/cassandra/build/classes/fqltool/,
> file:/home/cassandra/cassandra/build/test/classes/,
> file:/home/cassandra/cassandra/build/classes/main/, file:/home/cass
> ...[truncated 4929659 chars]...
> gService.java:519 - Waiting for messaging service to quiesce
> INFO [node1_isolatedExecutor:10] 2022-03-19 16:21:55,223
> SubstituteLogger.java:169 - INFO [node1_isolatedExecutor:10] node1
> 2022-03-19 16:21:55,221 MessagingService.java:519 - Waiting for messaging
> service to quiesce
> INFO [node2_isolatedExecutor:8] 2022-03-19 16:21:55,223
> SubstituteLogger.java:169 - INFO [node2_isolatedExecutor:8] node2 2022-03-19
> 16:21:55,222 MessagingService.java:519 - Waiting for messaging service to
> quiesce
> {code}
> Failures can also be repeatedly hit with CircleCI test multiplexer:
> [https://app.circleci.com/pipelines/github/adelapena/cassandra/1394/workflows/8d40d44b-7ccb-40fe-82d5-37db0bb228a3].
> The same test looks ok in 4.0, as suggested by Butler and [this repeated
> Circle
> run|https://app.circleci.com/pipelines/github/adelapena/cassandra/1395/workflows/5669dd1e-1a4c-4801-b1a1-c3ca04a29e2b].
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