Github user dilipbiswal commented on a diff in the pull request: https://github.com/apache/spark/pull/20525#discussion_r166540285 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/test/DataFrameReaderWriterSuite.scala --- @@ -301,7 +301,6 @@ class DataFrameReaderWriterSuite extends QueryTest with SharedSQLContext with Be intercept[AnalysisException] { spark.range(10).write.format("csv").mode("overwrite").partitionBy("id").save(path) } - spark.emptyDataFrame.write.format("parquet").mode("overwrite").save(path) } --- End diff -- Its not legal to write an empty struct in parquet. Its explained by Herman in [SPARK-20593](https://issues.apache.org/jira/browse/SPARK-20593). Previously, we didn't setup a write task for this where as now with this fix we do.
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