Known Issues in Apache Spark3

Learn about the known issues in Spark, the impact or changes to the functionality, and the workaround.

CDPD-57989: MERGE INTO Query fails on tables with non-nullable columns.
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TSB 2025-797: Using Spark vectorized reads on Iceberg tables with Parquet files could result in malformed data
Due to an upstream Apache Iceberg issue, in specific situations, customers executing Spark vectorized reads on Iceberg tables with Parquet files may encounter malformed output and data incorrectness.
For the latest update on this issue see the corresponding Knowledge article: TSB 2025-797: Using Spark vectorized reads on Iceberg tables with Parquet files could result in malformed data