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https://issues.apache.org/jira/browse/SPARK-58205?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-58205.
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Fix Version/s: 4.3.0
Resolution: Fixed
Issue resolved by pull request 57354
[https://github.com/apache/spark/pull/57354]
> Mark JSON/CSV/XML expressions stateful to prevent shared-evaluator data races
> -----------------------------------------------------------------------------
>
> Key: SPARK-58205
> URL: https://issues.apache.org/jira/browse/SPARK-58205
> 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
> Assignee: Vinod KC
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.3.0
>
>
> Several JSON, CSV, and XML expressions hold mutable state in @transient lazy
> val evaluator fields but did not override stateful: Boolean (which defaults
> to false).
> Because of this, freshCopyIfContainsStatefulExpression() never made fresh
> copies of these expressions, so when the same expression object was
> referenced more than once in a query plan — e.g., df.select(from_json(col,
> schema), from_json(col, schema)) — both references shared the same underlying
> evaluator instance. In interpreted execution this caused data-race corruption
> and incorrect results.
> The affected expressions were:
> - GetJsonObject, JsonTuple, JsonToStructs, StructsToJson, SchemaOfJson (JSON)
> - CsvToStructs, StructsToCsv, SchemaOfCsv (CSV)
> - XmlToStructs, StructsToXml (XML)
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