Github user dbtsai commented on the issue:
https://github.com/apache/spark/pull/21320
cc @viirya
If we select a nested field and a top level field, the schema pruning will
fail. Here is the reproducible test,
```scala
testSchemaPruning("select a single complex field and a top level field") {
val query = sql("select * from contacts")
.select("name.middle", "address")
query.explain(true)
query.printSchema()
query.show()
checkScan(query, "struct<name:struct<middle:string>,address:string>")
}
```
and the exception is
```
23:16:05.864 ERROR org.apache.spark.executor.Executor: Exception in task
1.0 in stage 3.0 (TID 6)
org.apache.spark.sql.execution.QueryExecutionException: Encounter error
while reading parquet files. One possible cause: Parquet column cannot be
converted in the corresponding files. Details:
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.nextIterator(FileScanRDD.scala:193)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.hasNext(FileScanRDD.scala:101)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.processNext(Unknown
Source)
at
org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
at
org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$11$$anon$1.hasNext(WholeStageCodegenExec.scala:674)
at
org.apache.spark.sql.execution.SparkPlan$$anonfun$2.apply(SparkPlan.scala:255)
at
org.apache.spark.sql.execution.SparkPlan$$anonfun$2.apply(SparkPlan.scala:247)
at
org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1$$anonfun$apply$25.apply(RDD.scala:850)
at
org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1$$anonfun$apply$25.apply(RDD.scala:850)
at
org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:52)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:325)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:289)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:90)
at org.apache.spark.scheduler.Task.run(Task.scala:121)
at
org.apache.spark.executor.Executor$TaskRunner$$anonfun$11.apply(Executor.scala:419)
at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1360)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:425)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.parquet.io.ParquetDecodingException: Can not read
value at 0 in block -1 in file
file:/private/var/folders/pr/4q3b9vkx36lbygjr5jhfmjcw0000gn/T/spark-a4fff68d-d51a-4c79-aa18-54cfd7f81a75/contacts/p=2/part-00000-8a4d9396-7be3-4fed-a55a-5580684ebda6-c000.snappy.parquet
at
org.apache.parquet.hadoop.InternalParquetRecordReader.nextKeyValue(InternalParquetRecordReader.java:251)
at
org.apache.parquet.hadoop.ParquetRecordReader.nextKeyValue(ParquetRecordReader.java:207)
at
org.apache.spark.sql.execution.datasources.RecordReaderIterator.hasNext(RecordReaderIterator.scala:39)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:409)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.hasNext(FileScanRDD.scala:101)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.nextIterator(FileScanRDD.scala:181)
... 19 more
Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.rangeCheck(ArrayList.java:657)
at java.util.ArrayList.get(ArrayList.java:433)
at org.apache.parquet.io.GroupColumnIO.getFirst(GroupColumnIO.java:99)
at org.apache.parquet.io.GroupColumnIO.getFirst(GroupColumnIO.java:99)
at
org.apache.parquet.io.PrimitiveColumnIO.getFirst(PrimitiveColumnIO.java:97)
at
org.apache.parquet.io.PrimitiveColumnIO.isFirst(PrimitiveColumnIO.java:92)
at
org.apache.parquet.io.RecordReaderImplementation.<init>(RecordReaderImplementation.java:278)
at
org.apache.parquet.io.MessageColumnIO$1.visit(MessageColumnIO.java:147)
at
org.apache.parquet.io.MessageColumnIO$1.visit(MessageColumnIO.java:109)
at
org.apache.parquet.filter2.compat.FilterCompat$NoOpFilter.accept(FilterCompat.java:165)
at
org.apache.parquet.io.MessageColumnIO.getRecordReader(MessageColumnIO.java:109)
at
org.apache.parquet.hadoop.InternalParquetRecordReader.checkRead(InternalParquetRecordReader.java:137)
at
org.apache.parquet.hadoop.InternalParquetRecordReader.nextKeyValue(InternalParquetRecordReader.java:222)
... 24 more
23:16:05.896 WARN org.apache.spark.scheduler.TaskSetManager: Lost task 1.0
in stage 3.0 (TID 6, localhost, executor driver):
org.apache.spark.sql.execution.QueryExecutionException: Encounter error while
reading parquet files. One possible cause: Parquet column cannot be converted
in the corresponding files. Details:
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.nextIterator(FileScanRDD.scala:193)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.hasNext(FileScanRDD.scala:101)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.processNext(Unknown
Source)
at
org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
at
org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$11$$anon$1.hasNext(WholeStageCodegenExec.scala:674)
at
org.apache.spark.sql.execution.SparkPlan$$anonfun$2.apply(SparkPlan.scala:255)
at
org.apache.spark.sql.execution.SparkPlan$$anonfun$2.apply(SparkPlan.scala:247)
at
org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1$$anonfun$apply$25.apply(RDD.scala:850)
at
org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1$$anonfun$apply$25.apply(RDD.scala:850)
at
org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:52)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:325)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:289)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:90)
at org.apache.spark.scheduler.Task.run(Task.scala:121)
at
org.apache.spark.executor.Executor$TaskRunner$$anonfun$11.apply(Executor.scala:419)
at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1360)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:425)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.parquet.io.ParquetDecodingException: Can not read
value at 0 in block -1 in file
file:/private/var/folders/pr/4q3b9vkx36lbygjr5jhfmjcw0000gn/T/spark-a4fff68d-d51a-4c79-aa18-54cfd7f81a75/contacts/p=2/part-00000-8a4d9396-7be3-4fed-a55a-5580684ebda6-c000.snappy.parquet
at
org.apache.parquet.hadoop.InternalParquetRecordReader.nextKeyValue(InternalParquetRecordReader.java:251)
at
org.apache.parquet.hadoop.ParquetRecordReader.nextKeyValue(ParquetRecordReader.java:207)
at
org.apache.spark.sql.execution.datasources.RecordReaderIterator.hasNext(RecordReaderIterator.scala:39)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:409)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.hasNext(FileScanRDD.scala:101)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.nextIterator(FileScanRDD.scala:181)
... 19 more
Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.rangeCheck(ArrayList.java:657)
at java.util.ArrayList.get(ArrayList.java:433)
at org.apache.parquet.io.GroupColumnIO.getFirst(GroupColumnIO.java:99)
at org.apache.parquet.io.GroupColumnIO.getFirst(GroupColumnIO.java:99)
at
org.apache.parquet.io.PrimitiveColumnIO.getFirst(PrimitiveColumnIO.java:97)
at
org.apache.parquet.io.PrimitiveColumnIO.isFirst(PrimitiveColumnIO.java:92)
at
org.apache.parquet.io.RecordReaderImplementation.<init>(RecordReaderImplementation.java:278)
at
org.apache.parquet.io.MessageColumnIO$1.visit(MessageColumnIO.java:147)
at
org.apache.parquet.io.MessageColumnIO$1.visit(MessageColumnIO.java:109)
at
org.apache.parquet.filter2.compat.FilterCompat$NoOpFilter.accept(FilterCompat.java:165)
at
org.apache.parquet.io.MessageColumnIO.getRecordReader(MessageColumnIO.java:109)
at
org.apache.parquet.hadoop.InternalParquetRecordReader.checkRead(InternalParquetRecordReader.java:137)
at
org.apache.parquet.hadoop.InternalParquetRecordReader.nextKeyValue(InternalParquetRecordReader.java:222)
... 24 more
```
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