test

        // Cluster backends defer the network fetch to avoid constructor timeouts.

        // Force an initial fetch now so backend.end() returns the real size.

        // Retry because peers may still be loading their own data after a

        // full cluster restart.  The ClusterBackend throttles fetches to once

        // per 10s, so we sleep long enough between retries.

        if (clusterEnabled) {

            for (int attempt = 0; attempt < 12; ++attempt) {

                {

                    AuthBackend::Guard initGuard(backend, AuthBackend::Shared);

            (void)backend.end();

                    if (backend.end() > sizeof(authdb::AuthHeader))

                        break;

                }

                if (attempt == 0)

                    std::cerr << "[AUTHDB] waiting for cluster admin data..." << std::endl;

                std::this_thread::sleep_for(std::chrono::seconds(10));

            }

        }

        authdb::AuthDB authdb(backend,httpd.getServerSockets());