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https://issues.apache.org/jira/browse/SPARK-18368?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yin Huai reopened SPARK-18368:
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> Regular expression replace throws NullPointerException when serialized
> ----------------------------------------------------------------------
>
> Key: SPARK-18368
> URL: https://issues.apache.org/jira/browse/SPARK-18368
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.1, 2.1.0
> Reporter: Ryan Blue
> Assignee: Ryan Blue
>
> This query fails with a [NullPointerException on line
> 247|https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala#L247]:
> {code}
> SELECT POSEXPLODE(SPLIT(REGEXP_REPLACE(ranks, '[\\[ \\]]', ''), ',')) AS
> (rank, col0) FROM table;
> {code}
> The problem is that POSEXPLODE is causing the REGEXP_REPLACE to be serialized
> after it is instantiated. The null value is a transient StringBuffer that
> should hold the result. The fix is to make the result value lazy.
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