[jira] [Commented] (CASSANDRA-16415) Broken test mixedModeReadColumnSubsetDigestCheck - org.apache.cassandra.distributed.upgrade.MixedModeReadTest

["Yifan Cai (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-16415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17279944#comment-17279944 ] 

Yifan Cai commented on CASSANDRA-16415:
---------------------------------------

Thanks for looking into it. Agree that it is broken ATM. 

A bit more info that the "digest mismatch" error only occurs in *v3X* and not in *v4*, although the patch is present in both versions. 

> Broken test mixedModeReadColumnSubsetDigestCheck - org.apache.cassandra.distributed.upgrade.MixedModeReadTest
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-16415
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16415
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Consistency/Coordination, Test/dtest/java
>            Reporter: Yifan Cai
>            Assignee: Jacek Lewandowski
>            Priority: Normal
>             Fix For: 4.0-beta
>
>
> The test has been failing and can always be reproduced in the recent CI. 
> Stack trace: 
> {code:java}
> junit.framework.AssertionFailedError: Found Digest Mismatch
>  at org.apache.cassandra.distributed.upgrade.MixedModeReadTest.checkTraceForDigestMismatch(MixedModeReadTest.java:89)
>  at org.apache.cassandra.distributed.upgrade.MixedModeReadTest.lambda$mixedModeReadColumnSubsetDigestCheck$0(MixedModeReadTest.java:63)
>  at org.apache.cassandra.distributed.upgrade.UpgradeTestBase$TestCase.run(UpgradeTestBase.java:171)
>  at org.apache.cassandra.distributed.upgrade.MixedModeReadTest.mixedModeReadColumnSubsetDigestCheck(MixedModeReadTest.java:76) {code}
> The initial investigation shows that 
>  * The test only fails in the setup phase of mixedModeReadColumnSubsetDigestCheck. The cluster version is *Versions.Major.v3X*
>  * The test failure is likely a consequence of CASSANDRA-15962. After dropping the commit in branch cassandra-3.11 and rebuild the dtest jar, the upgrade test can pass. Meanwhile, dropping the other commits does not help. 



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