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https://issues.apache.org/jira/browse/SPARK-58231?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yicong Huang resolved SPARK-58231.
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Resolution: Duplicate
follow up tests added in SPARK-58177
> Add regression test for SVD++ aggregateMessages combiner
> --------------------------------------------------------
>
> Key: SPARK-58231
> URL: https://issues.apache.org/jira/browse/SPARK-58231
> Project: Spark
> Issue Type: Test
> Components: GraphX
> Affects Versions: 5.0.0
> Reporter: Matthew Ball
> Priority: Major
> Labels: pull-request-available
>
> Follow-up to SPARK-58177 / PR #57314, which fixed a wrong operand in the
> SVD++ Phase 2 aggregateMessages combiner (the second vector was based on
> g2._2, dropping g1._2 and doubling g2._2). That fix merged without a test.
> This adds a regression test: the training-phase message combiner is extracted
> into a package-private SVDPlusPlus.combineTrainMessages method and
> unit-tested in SVDPlusPlusSuite to assert both vectors and the scalar are
> summed element-wise. The test fails on the pre-fix operand and passes on the
> fix.
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