void createDirs() throws Exception {
    if (!rawFs.mkdirs(tezDir)) {
      LOG.warn("mkdirs for " + tezDir + " returned false");
    }
    if (!rawFs.mkdirs(udfDir)) {
      LOG.warn("mkdirs for " + udfDir + " returned false");
    }
    if (!rawFs.mkdirs(confDir)) {
      LOG.warn("mkdirs for " + confDir + " returned false");
    }
  }
Gathers all the jar files necessary to start llap.
llap-server/src/java/org/apache/hadoop/hive/llap/cli/service/LlapTarComponentGatherer.java