[jira] [Assigned] (SPARK-12624) When schema is specified, we should give better error message if actual row length doesn't match

["Apache Spark (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-12624?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-12624:
------------------------------------

    Assignee:     (was: Apache Spark)

> When schema is specified, we should give better error message if actual row length doesn't match
> ------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-12624
>                 URL: https://issues.apache.org/jira/browse/SPARK-12624
>             Project: Spark
>          Issue Type: Bug
>          Components: PySpark, SQL
>            Reporter: Reynold Xin
>            Priority: Blocker
>
> The following code snippet reproduces this issue:
> {code}
> from pyspark.sql.types import StructType, StructField, IntegerType, StringType
> from pyspark.sql.types import Row
> schema = StructType([StructField("a", IntegerType()), StructField("b", StringType())])
> rdd = sc.parallelize(range(10)).map(lambda x: Row(a=x))
> df = sqlContext.createDataFrame(rdd, schema)
> df.show()
> {code}
> An unintuitive {{ArrayIndexOutOfBoundsException}} exception is thrown in this case:
> {code}
> ...
> Caused by: java.lang.ArrayIndexOutOfBoundsException: 1
>         at org.apache.spark.sql.catalyst.expressions.GenericInternalRow.genericGet(rows.scala:227)
>         at org.apache.spark.sql.catalyst.expressions.BaseGenericInternalRow$class.getAs(rows.scala:35)
>         at org.apache.spark.sql.catalyst.expressions.BaseGenericInternalRow$class.isNullAt(rows.scala:36)
> ...
> {code}
> We should give a better error message here.



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