Getting error " Hadoop Release '%s' is an invalid/unsupported release. Valid entries are in 2.6.0"

Question

I am working on mongodb-hadoop connector. For this process, i am building mongodb adapter,after edited build.sbt file,i am trying to building adapter like ./sbt package then i am getting error

Hadoop Release '%s' is an invalid/unsupported release

My Hadoop version

Hadoop 2.6.0-cdh5.4.2 

My build.sbt file

name := "mongo-hadoop"    
organization := "org.mongodb"
hadoopRelease in ThisBuild := "2.6.0"

Please help me how can i fix it ?