Github user zzcclp commented on the issue:
https://github.com/apache/carbondata/pull/1753
The discussion about this on mailing list :
[Should-we-use-Spark-2-2-1-as-default-version-for-Spark-2-2-supported](http://apache-carbondata-dev-mailing-list-archive.1130556.n5.nabble.com/Should-we-use-Spark-2-2-1-as-default-version-for-Spark-2-2-supported-td32713.html)---
