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https://issues.apache.org/jira/browse/SPARK-21697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16122234#comment-16122234
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Weiqing Yang commented on SPARK-21697:
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Thanks for filing this issue!

> NPE & ExceptionInInitializerError trying to load UTF from HDFS
> --------------------------------------------------------------
>
>                 Key: SPARK-21697
>                 URL: https://issues.apache.org/jira/browse/SPARK-21697
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.1.1
>         Environment: Spark Client mode, Hadoop 2.6.0
>            Reporter: Steve Loughran
>            Priority: Minor
>
> Reported on [the 
> PR|https://github.com/apache/spark/pull/17342#issuecomment-321438157] for 
> SPARK-12868: trying to load a UDF of HDFS is triggering an 
> {{ExceptionInInitializerError}}, caused by an NPE which should only happen if 
> the commons-logging {{LOG}} log is null.
> Hypothesis: the commons logging scan for {{commons-logging.properties}} is 
> happening in the classpath with the HDFS JAR; this is triggering a D/L of the 
> JAR, which needs to force in commons-logging, and, as that's not inited yet, 
> NPEs



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