private Response getHadoopVersion() throws IOException {
    String version = VersionInfo.getVersion();
    return JsonBuilder.create()
        .put("module", "hadoop")
        .put("version", version)
        .build();
  }
Find the version of Hive, Hadoop, or Pig that is being used in this
interface.
hcatalog/webhcat/svr/src/main/java/org/apache/hive/hcatalog/templeton/VersionDelegator.java