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https://issues.apache.org/jira/browse/SPARK-18260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15637290#comment-15637290
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Apache Spark commented on SPARK-18260:
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User 'brkyvz' has created a pull request for this issue:
https://github.com/apache/spark/pull/15771
> from_json can throw a better exception when it can't find the column or be
> nullSafe
> -----------------------------------------------------------------------------------
>
> Key: SPARK-18260
> URL: https://issues.apache.org/jira/browse/SPARK-18260
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Burak Yavuz
> Priority: Blocker
>
> I got this exception:
> {code}
> SparkException: Job aborted due to stage failure: Task 0 in stage 13028.0
> failed 4 times, most recent failure: Lost task 0.3 in stage 13028.0 (TID
> 74170, 10.0.138.84, executor 2): java.lang.NullPointerException
> at
> org.apache.spark.sql.catalyst.expressions.JsonToStruct.eval(jsonExpressions.scala:490)
> at
> org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificPredicate.eval(Unknown
> Source)
> at
> org.apache.spark.sql.catalyst.expressions.codegen.GeneratePredicate$$anonfun$create$2.apply(GeneratePredicate.scala:71)
> at
> org.apache.spark.sql.catalyst.expressions.codegen.GeneratePredicate$$anonfun$create$2.apply(GeneratePredicate.scala:71)
> at
> org.apache.spark.sql.execution.FilterExec$$anonfun$17$$anonfun$apply$2.apply(basicPhysicalOperators.scala:211)
> at
> org.apache.spark.sql.execution.FilterExec$$anonfun$17$$anonfun$apply$2.apply(basicPhysicalOperators.scala:210)
> at scala.collection.Iterator$$anon$13.hasNext(Iterator.scala:463)
> at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
> at
> org.apache.spark.sql.execution.SparkPlan$$anonfun$2.apply(SparkPlan.scala:231)
> at
> org.apache.spark.sql.execution.SparkPlan$$anonfun$2.apply(SparkPlan.scala:225)
> at
> org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1$$anonfun$apply$24.apply(RDD.scala:804)
> at
> org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1$$anonfun$apply$24.apply(RDD.scala:804)
> {code}
> This was because the column that I called `from_json` on didn't exist for all
> of my rows. Either from_json should be null safe, or it should fail with a
> better error message
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