Which version of spark is kylin 2.0 Beta using ?

[Mars Xu]

Hi ,
   I have install kylin 2.0 beta on my cluster which has already deploy a spark 
2.1, but when I startup kylin server and build cube, the Web UI of Cube Build 
Step show it is spark 1.6.3.

   Is that kylin already include a spark version ? or some other else I need to 
configure ?


Thanks

Mars.