code: @Override
      public void start() throws AtlasException {
          if (isHAEnabled()) {
              LOG.info("Not starting embedded instances when HA is enabled.");
              return;
          }
          if (isEmbedded()) {
              try {
                  startZk();
                  startKafka();
              } catch (Exception e) {
                  throw new AtlasException("Failed to start embedded kafka", e);
              }
          }
      }
docs: ----- Service ---------------------------------------------------------