Vinod KC commented on SPARK-21588:


> SQLContext.getConf(key, null) should return null, but it throws NPE
> -------------------------------------------------------------------
>                 Key: SPARK-21588
>                 URL: https://issues.apache.org/jira/browse/SPARK-21588
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Burak Yavuz
>            Priority: Minor
> SQLContext.get(key) for a key that is not defined in the conf, and doesn't 
> have a default value defined, throws a NoSuchElementException. In order to 
> avoid that, I used a null as the default value, which threw a NPE instead. If 
> it is null, it shouldn't try to parse the default value in `getConfString`

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