Alessandro Bacchini created SPARK-38285:
-------------------------------------------
Summary: ClassCastException: GenericArrayData cannot be cast to
InternalRow
Key: SPARK-38285
URL: https://issues.apache.org/jira/browse/SPARK-38285
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 3.2.1
Reporter: Alessandro Bacchini
The following code with Spark 3.2.1 raises an exception:
{code:python}
import pyspark.sql.functions as F
from pyspark.sql.types import StructType, StructField, ArrayType, StringType
t = StructType([
StructField('o',
ArrayType(
StructType([
StructField('s', StringType(), False),
StructField('b', ArrayType(
StructType([
StructField('e', StringType(), False)
]),
True),
False)
]),
True),
False)])
value = {
"o": [
{
"s": "string1",
"b": [
{
"e": "string2"
},
{
"e": "string3"
}
]
},
{
"s": "string4",
"b": [
{
"e": "string5"
},
{
"e": "string6"
},
{
"e": "string7"
}
]
}
]
}
df = (
spark.createDataFrame([value], schema=t)
.select(F.explode("o").alias("eo"))
.select("eo.b.e")
)
df.show()
{code}
The exception message is:
{code}
java.lang.ClassCastException:
org.apache.spark.sql.catalyst.util.GenericArrayData cannot be cast to
org.apache.spark.sql.catalyst.InternalRow
at
org.apache.spark.sql.catalyst.util.GenericArrayData.getStruct(GenericArrayData.scala:76)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.processNext(Unknown
Source)
at
org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
at
org.apache.spark.sql.execution.WholeStageCodegenExec$$anon$1.hasNext(WholeStageCodegenExec.scala:759)
at
org.apache.spark.sql.execution.collect.UnsafeRowBatchUtils$.encodeUnsafeRows(UnsafeRowBatchUtils.scala:80)
at
org.apache.spark.sql.execution.collect.Collector.$anonfun$processFunc$1(Collector.scala:155)
at
org.apache.spark.scheduler.ResultTask.$anonfun$runTask$3(ResultTask.scala:75)
at
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
at
org.apache.spark.scheduler.ResultTask.$anonfun$runTask$1(ResultTask.scala:75)
at
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:55)
at org.apache.spark.scheduler.Task.doRunTask(Task.scala:153)
at org.apache.spark.scheduler.Task.$anonfun$run$1(Task.scala:122)
at
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
at org.apache.spark.scheduler.Task.run(Task.scala:93)
at
org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$13(Executor.scala:824)
at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1641)
at
org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$4(Executor.scala:827)
at
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
at
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:683)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
{code}
I am using Spark 3.2.1.
Please note that the issue seems to be related to SPARK-37577: I am using the
same DataFrame schema, but this time I have populated it with non empty value.
I think that this is bug because with the following configuration it works as
expected:
{code:python}
spark.conf.set("spark.sql.optimizer.expression.nestedPruning.enabled", False)
spark.conf.set("spark.sql.optimizer.nestedSchemaPruning.enabled", False)
{code}
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