[jira] [Comment Edited] (SPARK-25935) Prevent null rows from JSON parser

["Dongjoon Hyun (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-25935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17302792#comment-17302792 ] 

Dongjoon Hyun edited comment on SPARK-25935 at 3/16/21, 6:38 PM:
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I removed the `Fix Version = 3.0.0` from this issue because this was reverted and resolved as `Won't Fix`.


was (Author: dongjoon):
I removed the `Fix Version = 3.0.0` from this issue because this is reverted and resolved as `Won't Fix`.

> Prevent null rows from JSON parser
> ----------------------------------
>
>                 Key: SPARK-25935
>                 URL: https://issues.apache.org/jira/browse/SPARK-25935
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.4.0
>            Reporter: Max Gekk
>            Priority: Minor
>
> Currently, JSON parser can produce nulls if it cannot detect any valid JSON token on the root level, see https://github.com/apache/spark/blob/4d6704db4d490bd1830ed3c757525f41058523e0/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/json/JacksonParser.scala#L402 . As a consequence of that, the from_json() function can produce null in the PERMISSIVE mode. To prevent that, need to throw an exception which should treat as a bad record and handled according specified mode.



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