What is going wrong with `unionAll` of Spark `DataFrame`?

Question

Using Spark 1.5.0 and given the following code, I expect unionAll to union DataFrames based on their column name. In the code, I\'m using some FunSuite for pass

Answer 1

This issue is getting fixed in spark2.3. They are adding support of unionByName in the dataset.

https://issues.apache.org/jira/browse/SPARK-21043