[jira] [Commented] (SPARK-24165) UDF within when().otherwise() raises NullPointerException

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-24165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16529108#comment-16529108 ] 

Apache Spark commented on SPARK-24165:
--------------------------------------

User 'mn-mikke' has created a pull request for this issue:
https://github.com/apache/spark/pull/21687

> UDF within when().otherwise() raises NullPointerException
> ---------------------------------------------------------
>
>                 Key: SPARK-24165
>                 URL: https://issues.apache.org/jira/browse/SPARK-24165
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Jingxuan Wang
>            Priority: Major
>
> I have a UDF which takes java.sql.Timestamp and String as input column type and returns an Array of (Seq[case class], Double) as output. Since some of values in input columns can be nullable, I put the UDF inside a when($input.isNull, null).otherwise(UDF) filter. Such function works well when I test in spark shell. But running as a scala jar in spark-submit with yarn cluster mode, it raised NullPointerException which points to the UDF function. If I remove the when().otherwsie() condition, but put null check inside the UDF, the function works without issue in spark-submit.



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