Tae-kyeom, Kim created SPARK-31116:
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Summary: PrquetRowConverter does not follow case sensitivity
Key: SPARK-31116
URL: https://issues.apache.org/jira/browse/SPARK-31116
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 3.0.0
Reporter: Tae-kyeom, Kim
After upgrading spark versrion to 3.0.0-SNAPSHOT. Selecting parquet columns got
exception in case insensitive manner. Even we set spark.sql.caseSensitive to
false. Reading parquet with case ignored schema (which means columns in parquet
and catalyst types are same with respect to case insensitive manner)
To reproduce error executing follow code cause
java.lang.IllegalArgumentException
{code:java}
val path = "/some/temp/path"
spark
.range(1L)
.selectExpr("NAMED_STRUCT('lowercase', id, 'camelCase', id + 1) AS
StructColumn")
.write.parquet(path)
val caseInsensitiveSchema = new StructType()
.add(
"StructColumn",
new StructType()
.add("LowerCase", LongType)
.add("camelcase", LongType)
spark.read.schema(caseInsensitiveSchema).parquet(path).show(){code}
Then we got following error.
{code:java}
23:57:09.077 ERROR org.apache.spark.executor.Executor: Exception in task 0.0 in
stage 215.0 (TID 366)23:57:09.077 ERROR org.apache.spark.executor.Executor:
Exception in task 0.0 in stage 215.0 (TID
366)java.lang.IllegalArgumentException: lowercase does not exist. Available:
LowerCase, camelcase at
org.apache.spark.sql.types.StructType.$anonfun$fieldIndex$1(StructType.scala:306)
at scala.collection.immutable.Map$Map2.getOrElse(Map.scala:147) at
org.apache.spark.sql.types.StructType.fieldIndex(StructType.scala:305) at
org.apache.spark.sql.execution.datasources.parquet.ParquetRowConverter.$anonfun$fieldConverters$1(ParquetRowConverter.scala:182)
at scala.collection.TraversableLike.$anonfun$map$1(TraversableLike.scala:238)
at scala.collection.mutable.ResizableArray.foreach(ResizableArray.scala:62) at
scala.collection.mutable.ResizableArray.foreach$(ResizableArray.scala:55) at
scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:49) at
scala.collection.TraversableLike.map(TraversableLike.scala:238) at
scala.collection.TraversableLike.map$(TraversableLike.scala:231) at
scala.collection.AbstractTraversable.map(Traversable.scala:108) at
org.apache.spark.sql.execution.datasources.parquet.ParquetRowConverter.<init>(ParquetRowConverter.scala:181)
at
org.apache.spark.sql.execution.datasources.parquet.ParquetRowConverter.org$apache$spark$sql$execution$datasources$parquet$ParquetRowConverter$$newConverter(ParquetRowConverter.scala:351)
at
org.apache.spark.sql.execution.datasources.parquet.ParquetRowConverter.$anonfun$fieldConverters$1(ParquetRowConverter.scala:185)
at scala.collection.TraversableLike.$anonfun$map$1(TraversableLike.scala:238)
at scala.collection.mutable.ResizableArray.foreach(ResizableArray.scala:62) at
scala.collection.mutable.ResizableArray.foreach$(ResizableArray.scala:55) at
scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:49) at
scala.collection.TraversableLike.map(TraversableLike.scala:238) at
scala.collection.TraversableLike.map$(TraversableLike.scala:231) at
scala.collection.AbstractTraversable.map(Traversable.scala:108) at
org.apache.spark.sql.execution.datasources.parquet.ParquetRowConverter.<init>(ParquetRowConverter.scala:181)
at
org.apache.spark.sql.execution.datasources.parquet.ParquetRecordMaterializer.<init>(ParquetRecordMaterializer.scala:43)
at
org.apache.spark.sql.execution.datasources.parquet.ParquetReadSupport.prepareForRead(ParquetReadSupport.scala:130)
at
org.apache.parquet.hadoop.InternalParquetRecordReader.initialize(InternalParquetRecordReader.java:204)
at
org.apache.parquet.hadoop.ParquetRecordReader.initializeInternalReader(ParquetRecordReader.java:182)
at
org.apache.parquet.hadoop.ParquetRecordReader.initialize(ParquetRecordReader.java:140)
at
org.apache.spark.sql.execution.datasources.parquet.ParquetFileFormat.$anonfun$buildReaderWithPartitionValues$2(ParquetFileFormat.scala:341)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.org$apache$spark$sql$execution$datasources$FileScanRDD$$anon$$readCurrentFile(FileScanRDD.scala:116)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.nextIterator(FileScanRDD.scala:169)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.hasNext(FileScanRDD.scala:93)
at scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:458) at
scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:458) at
scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:458) at
org.apache.spark.util.Utils$.getIteratorSize(Utils.scala:1804) at
org.apache.spark.rdd.RDD.$anonfun$count$1(RDD.scala:1229) at
org.apache.spark.rdd.RDD.$anonfun$count$1$adapted(RDD.scala:1229) at
org.apache.spark.SparkContext.$anonfun$runJob$5(SparkContext.scala:2144) at
org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:90) at
org.apache.spark.scheduler.Task.run(Task.scala:127) at
org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$3(Executor.scala:460)
at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1377) at
org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:463) at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
{code}
I think from 3.0.0,
`org.apache.spark.sql.execution.datasources.parquet.ParquetRowConverter` does
not have equal number of fields between parquetRequestedSchema and
catalystRequestedSchema ([https://github.com/apache/spark/pull/22880]). So we
consider case sensitivity in ParquetRowConverter or some related classes.
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