Hi mahesh Have a look at this page to see, there;s steps mentioned on how you can have a successful infrabuild of openJDK.
http://java.net/projects/adoptopenjdk/pages/AdoptOpenJDKVMBuild#Alternative_build_(build-infra) or you can perform the steps from the start http://java.net/projects/adoptopenjdk/pages/AdoptOpenJDKVMBuild Thanks Mani
