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https://issues.apache.org/jira/browse/SPARK-58578?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-58578:
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Labels: pull-request-available (was: )
> Mark ApplyFunctionExpression stateful to prevent reusedRow data races under
> concurrent evaluation
> -------------------------------------------------------------------------------------------------
>
> Key: SPARK-58578
> URL: https://issues.apache.org/jira/browse/SPARK-58578
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.5.0, 4.1.0, 4.0.0, 4.2.0, 4.3.0
> Reporter: Vinod KC
> Priority: Major
> Labels: pull-request-available
>
> `ApplyFunctionExpression` holds a shared mutable row buffer (reusedRow) on
> the expression instance. When sibling QueryExecutions derived from the same
> base DataFrame run concurrently, they share the same expression instance and
> race on this buffer, silently producing wrong results.
> Because stateful defaults to false, the expression is never cloned before
> concurrent execution. Need to override def stateful: Boolean = true, which
> causes each concurrent execution to get its own independent instance.
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