[jira] [Created] (SPARK-27597) RuntimeConfig should be serializable

["Nick Dimiduk (JIRA)" <ji...@apache.org>]

Nick Dimiduk created SPARK-27597:
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             Summary: RuntimeConfig should be serializable
                 Key: SPARK-27597
                 URL: https://issues.apache.org/jira/browse/SPARK-27597
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.4.1
            Reporter: Nick Dimiduk


When implementing a UDF or similar, it's quite surprising to see that the {{SparkSession}} is {{Serializable}} but {{RuntimeConf}} is not. When modeling UDFs in an object-oriented way, this leads to quite a surprise, an ugly NPE from the {{call}} site.
{noformat}
Caused by: java.lang.NullPointerException
at org.apache.spark.sql.SparkSession.sessionState$lzycompute(SparkSession.scala:143)
at org.apache.spark.sql.SparkSession.sessionState(SparkSession.scala:141)
at org.apache.spark.sql.SparkSession.conf$lzycompute(SparkSession.scala:170)
at org.apache.spark.sql.SparkSession.conf(SparkSession.scala:170)
...{noformat}



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