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https://issues.apache.org/jira/browse/SPARK-5849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14323421#comment-14323421
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Apache Spark commented on SPARK-5849:
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User 'JoshRosen' has created a pull request for this issue:
https://github.com/apache/spark/pull/4637
> Handle more types of invalid JSON in SubmitRestProtocolMessage.parseAction
> --------------------------------------------------------------------------
>
> Key: SPARK-5849
> URL: https://issues.apache.org/jira/browse/SPARK-5849
> Project: Spark
> Issue Type: Bug
> Components: Spark Submit
> Affects Versions: 1.3.0
> Reporter: Josh Rosen
> Assignee: Josh Rosen
> Priority: Critical
>
> SubmitRestProtocolMessage.parseAction casts the result of {{parse(json)}} to
> {{JObject}}, but this cast can fail if invalid requests can still be parsed
> as other JSON types, such as JSON strings. We should replace this unchecked
> cast with pattern-matching in order to handle these types of invalid requests.
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