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https://issues.apache.org/jira/browse/FLINK-40288?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18115431#comment-18115431
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Martijn Visser commented on FLINK-40288:
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Another release-2.3 occurrence, push run of 2026-09-14, Java 17, module table:
https://github.com/apache/flink/actions/runs/34875691136
So yes this needs to be backported, re-opening
> Multiple JoinSemanticTests fail
> -------------------------------
>
> Key: FLINK-40288
> URL: https://issues.apache.org/jira/browse/FLINK-40288
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner, Tests
> Reporter: Sergey Nuyanzin
> Assignee: Sergey Nuyanzin
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.4.0
>
>
> example
> {noformat}
> java.lang.AssertionError: [left-join-not-null-nested-row]
> Expecting actual:
> ["+I[1, 1]", "+I[2, -1]"]
> to contain exactly in any order:
> ["+I[1, 1]", "+I[2, null]"]
> elements not found:
> ["+I[2, null]"]
> and elements not expected:
> ["+I[2, -1]"]
> {noformat}
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