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https://issues.apache.org/jira/browse/SPARK-59321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18112641#comment-18112641
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Hyukjin Kwon commented on SPARK-59321:
--------------------------------------

Resolving as Not A Problem. Protobuf schema conversion recurses over a finite 
descriptor (bounded by the schema, not by input data), and recursive message 
types are already rejected by default, so there is no unbounded recursion to 
guard against here; the proposed bound added no coverage and could affect 
legitimate deeply-nested non-recursive schemas. See apache/spark#58602.

> Bound protobuf schema recursion depth across message types
> ----------------------------------------------------------
>
>                 Key: SPARK-59321
>                 URL: https://issues.apache.org/jira/browse/SPARK-59321
>             Project: Spark
>          Issue Type: Improvement
>          Components: Protobuf
>    Affects Versions: 5.0.0
>            Reporter: Hyukjin Kwon
>            Priority: Major
>              Labels: pull-request-available
>




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