Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/5034#discussion_r26449101
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/parquet/newParquet.scala ---
@@ -672,7 +672,11 @@ private[sql] object ParquetRelation2 {
.getKeyValueMetaData
.toMap
.get(RowReadSupport.SPARK_METADATA_KEY)
- .map(DataType.fromJson(_).asInstanceOf[StructType])
+ .map { serializedSchema =>
+ Try(DataType.fromJson(serializedSchema))
--- End diff --
Hm, after double thinking this, we may not need a log here. Because the
user doesn't need to care about using JSON or old style case class string when
reading/writing Parquet files. Spark SQL handles this automatically.
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