apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/AppNamespaceServiceWithCache.java/AppNamespaceServiceWithCache/scanNewAppNamespaces
class AppNamespaceServiceWithCache:  private void scanNewAppNamespaces() {
    Transaction transaction = Tracer.newTransaction("Apollo.AppNamespaceServiceWithCache",
        "scanNewAppNamespaces");
    try {
      this.loadNewAppNamespaces();
      transaction.setStatus(Transaction.SUCCESS);
    } catch (Throwable ex) {
      transaction.setStatus(ex);
      logger.error("Load new app namespaces failed", ex);
    } finally {
      transaction.complete();
    }
  }