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https://issues.apache.org/jira/browse/SPARK-58906?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ruifeng Zheng resolved SPARK-58906.
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Fix Version/s: 4.4.0
Resolution: Fixed
Issue resolved by pull request 58166
[https://github.com/apache/spark/pull/58166]
> Make PySpark vector and matrix UDTs singletons
> ----------------------------------------------
>
> Key: SPARK-58906
> URL: https://issues.apache.org/jira/browse/SPARK-58906
> Project: Spark
> Issue Type: Sub-task
> Components: ML, PySpark
> Affects Versions: 5.0.0
> Reporter: Ruifeng Zheng
> Assignee: Ruifeng Zheng
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.4.0
>
>
> PySpark VectorUDT and MatrixUDT are stateless. Make the pyspark.ml.linalg and
> pyspark.mllib.linalg implementations use the existing DataTypeSingleton
> metaclass so repeated construction and schema JSON round-trips reuse the same
> Python UDT instances, matching the singleton direction in PR #57757.
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