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https://issues.apache.org/jira/browse/CASSANDRA-16415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17279933#comment-17279933
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Adam Holmberg commented on CASSANDRA-16415:
-------------------------------------------
I don't think this is actually flaky. It's just broken right now. I'm hoping to
take a look at it this afternoon if I get time, and Jacek also indicated he
could look into it next week.
> Flaky 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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