[GH-2704] Disable TransformNestedUDTParquet on Spark 4.1+#2703
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jiayuasu merged 1 commit intoapache:masterfrom Mar 10, 2026
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SPARK-48942: nested UDTs crash the vectorized Parquet reader on Spark < 4.1. SPARK-52651 fixes this in Spark 4.1+ by recursively stripping UDTs in ColumnVector, making the TransformNestedUDTParquet workaround unnecessary. Only register the TransformNestedUDTParquet optimizer rule when running on Spark < 4.1. Uses defensive version parsing with Try/getOrElse and .lift() to avoid exceptions on malformed version strings.
james-willis
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Is this PR related to a ticket?
[GH-XXX] my subject. Closes Disable TransformNestedUDTParquet workaround on Spark 4.1+ #2704What changes were proposed in this PR?
Disable the
TransformNestedUDTParquetoptimizer rule on Spark 4.1+, where the root cause (SPARK-48942) has been fixed natively by SPARK-52651.PR #2359 introduced
TransformNestedUDTParquetto work around SPARK-48942, which caused the vectorized Parquet reader to crash on nested UDTs. SPARK-52651 (merged in Spark 4.1) fixes this at the Spark level by recursively stripping UDTs inColumnVector, making our workaround unnecessary on 4.1+.This PR version-gates the workaround so it is only registered on Spark < 4.1. It uses defensive version parsing (
Try/getOrElse,.lift()) to avoid exceptions on malformed version strings.How was this patch tested?
mvn clean install -Dspark=3.5 -Dscala=2.12 -DskipTestsDid this PR include necessary documentation updates?