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Posted to issues@spark.apache.org by "Ruifeng Zheng (Jira)" <ji...@apache.org> on 2026/08/20 12:46:00 UTC

[jira] [Created] (SPARK-58906) Make PySpark vector and matrix UDTs singletons

Ruifeng Zheng created SPARK-58906:
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             Summary: 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
    Affects Versions: 5.0.0
            Reporter: Ruifeng Zheng


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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