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https://issues.apache.org/jira/browse/SPARK-58161?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-58161:
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Labels: pull-request-available (was: )
> [PYTHON] Standardize PySpark UDF row count mismatch error to use
> RESULT_ROWS_MISMATCH
> -------------------------------------------------------------------------------------
>
> Key: SPARK-58161
> URL: https://issues.apache.org/jira/browse/SPARK-58161
> Project: Spark
> Issue Type: Improvement
> Components: PySpark
> Affects Versions: 4.0.0
> Reporter: gaurav kumar pandey
> Priority: Major
> Labels: pull-request-available
>
> Currently, PySpark Pandas and Arrow UDFs raise a custom
> SCHEMA_MISMATCH_FOR_PANDAS_UDF error class when the returned result length
> does not match the input row count.
> To align with Spark's error standardization efforts, we should migrate this
> to the standard RESULT_ROWS_MISMATCH error class and remove the redundant
> SCHEMA_MISMATCH_FOR_PANDAS_UDF from error-conditions.json.
> Proposed Changes:
> 1. Migrate UDF scalar and arrow verification logic in worker.py to raise
> RESULT_ROWS_MISMATCH with input/output length parameters.
> 2. Retain the old error message format ("Result vector from pandas_udf was
> not the required length...") in the message string for backward-compatibility
> with user code that asserts on the exception message.
> 3. Update affected unit tests, documentation guidelines (debugging.rst), and
> clean up error-conditions.json.
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