Burak Yavuz created SPARK-18260:
-----------------------------------
Summary: 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
Reporter: Burak Yavuz
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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