@GET
  @Path("version/hadoop")
  @Produces(MediaType.APPLICATION_JSON)
  public Response hadoopVersion()  throws IOException {
    VersionDelegator d = new VersionDelegator(appConf);
    return d.getVersion("hadoop");
  }
Get version of hadoop software being run by this WebHCat server
hcatalog/webhcat/svr/src/main/java/org/apache/hive/hcatalog/templeton/Server.java