Please update the documentation for Windows install with following
1. The path to Java should not contain a space in it.
2. The java version should be a JDK version as there is a dependency on Jar.exe.
Both of these took me along time to find, so it would be good to put in the guide here: http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.1.2-Win/bk_installing_hdp_for_windows/content/win-chap2-singlenode.html