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https://issues.apache.org/jira/browse/CASSANDRA-21471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18089970#comment-18089970
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Dmitry Konstantinov commented on CASSANDRA-21471:
-------------------------------------------------

It seems QueriesTable mechanism was not designed to handle 
SEPExecutor.maybeExecuteImmediately scenario:
*  tasks are set only within SEP Worker task assign
*  we cannot have more than 1 task assigned to the same thread at the same time

So, the test have started to fail once we began to use executeImmediately  more 
frequently (after CASSANDRA-21429 fix).


> Test failure: org.apache.cassandra.distributed.test.QueriesTableTest
> --------------------------------------------------------------------
>
>                 Key: CASSANDRA-21471
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-21471
>             Project: Apache Cassandra
>          Issue Type: Bug
>          Components: Local/Other
>            Reporter: Dmitry Konstantinov
>            Priority: Normal
>             Fix For: 6.x, 7.x
>
>         Attachments: image-2026-06-18-17-41-01-479.png
>
>
> https://pre-ci.cassandra.apache.org/job/cassandra/609/ 
>  !image-2026-06-18-17-41-01-479.png|width=600! 
> Tests / jvm-dtest jdk11 3/16 / 
> org.apache.cassandra.distributed.test.QueriesTableTest.shouldExposeCAS-_jdk11_x86_64
> Tests / jvm-dtest jdk17 3/16 / 
> org.apache.cassandra.distributed.test.QueriesTableTest.shouldExposeCAS-_jdk17_x86_64
> Tests / jvm-dtest jdk21 3/16 / 
> org.apache.cassandra.distributed.test.QueriesTableTest.shouldExposeCAS-_jdk21_x86_64
> Tests / jvm-dtest jdk11 3/16 / 
> org.apache.cassandra.distributed.test.QueriesTableTest.shouldExposeReadsAndWrites-_jdk11_x86_64
> Tests / jvm-dtest jdk17 3/16 / 
> org.apache.cassandra.distributed.test.QueriesTableTest.shouldExposeReadsAndWrites-_jdk17_x86_64
> Tests / jvm-dtest jdk21 3/16 / 
> org.apache.cassandra.distributed.test.QueriesTableTest.shouldExposeReadsAndWrites-_jdk21_x86_64



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