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https://issues.apache.org/jira/browse/SPARK-27221?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-27221.
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Resolution: Fixed
Fix Version/s: 3.0.0
Issue resolved by pull request 24159
[https://github.com/apache/spark/pull/24159]
> Improve the assert error message in TreeNode.parseToJson
> --------------------------------------------------------
>
> Key: SPARK-27221
> URL: https://issues.apache.org/jira/browse/SPARK-27221
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Shixiong Zhu
> Assignee: Shixiong Zhu
> Priority: Minor
> Fix For: 3.0.0
>
>
> When TreeNode.parseToJson may throw an assert error without any error message
> when a TreeNode is not implemented properly, and it's hard to find the bad
> TreeNode implementation.
> It's better to improve the error message to indicate the type of TreeNode.
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