Takeshi Yamamuro created SPARK-24204:
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Summary: Verify a write schema in OrcFileFormat
Key: SPARK-24204
URL: https://issues.apache.org/jira/browse/SPARK-24204
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.3.0
Reporter: Takeshi Yamamuro
The native orc file format throws an exception with a meaningless message in
executor-sides when unsupported types passed;
{code}
scala> val rdd = spark.sparkContext.parallelize(List(Row(1, null), Row(2,
null)))
scala> val schema = StructType(StructField("a", IntegerType) ::
StructField("b", NullType) :: Nil)
scala> val df = spark.createDataFrame(rdd, schema)
scala> df.write.orc("/tmp/orc")
java.lang.IllegalArgumentException: Can't parse category at
'struct<a:int,b:null^>'
at
org.apache.orc.TypeDescription.parseCategory(TypeDescription.java:223)
at org.apache.orc.TypeDescription.parseType(TypeDescription.java:332)
at org.apache.orc.TypeDescription.parseStruct(TypeDescription.java:327)
at org.apache.orc.TypeDescription.parseType(TypeDescription.java:385)
at org.apache.orc.TypeDescription.fromString(TypeDescription.java:406)
at
org.apache.spark.sql.execution.datasources.orc.OrcSerializer.org$apache$spark$sql$execution$datasources$orc$OrcSerializer$$createOrcValue(OrcSerializ
er.scala:226)
at
org.apache.spark.sql.execution.datasources.orc.OrcSerializer.<init>(OrcSerializer.scala:36)
at
org.apache.spark.sql.execution.datasources.orc.OrcOutputWriter.<init>(OrcOutputWriter.scala:36)
at
org.apache.spark.sql.execution.datasources.orc.OrcFileFormat$$anon$1.newInstance(OrcFileFormat.scala:108)
at
org.apache.spark.sql.execution.datasources.FileFormatWriter$SingleDirectoryWriteTask.newOutputWriter(FileFormatWriter.scala:376)
at
org.apache.spark.sql.execution.datasources.FileFormatWriter$SingleDirectoryWriteTask.execute(FileFormatWriter.scala:387)
at
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$org$apache$spark$sql$execution$datasources$FileFormatWriter$$executeTask$3.apply
(FileFormatWriter.scala:278)
{code}
It seems to be better to verify a write schema in a driver side for users along
with the CSV fromat;
https://github.com/apache/spark/blob/76ecd095024a658bf68e5db658e4416565b30c17/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/CSVFileFormat.scala#L65
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