sortedIPList: []string{"hostname", "192.168.1.106", "127.0.0.1"},
		},
		// Non parsable ip is assumed to be hostname, with a mixed input of ip and hostname.
		// gets preserved and moved into left most elements, regardless of
		// IP based sorting.
		{
			ipList:       []string{"hostname1", "10.0.0.13", "hostname2", "127.0.0.1", "192.168.1.106"},

    private static boolean isAllDigits(final String hostname) {
        for (int i = 0; i < hostname.length(); i++) {
            if (!Character.isDigit(hostname.charAt(i))) {
                return false;
            }
        }
        return true;
    }

    @Override
    public UniAddress getByName(final String hostname) throws UnknownHostException {
        return getByName(hostname, false);
    }

    @Override

        }
    }

    // Test with different hostnames
    public void test_differentHostnames() {
        String[] hostnames = { "smtp.gmail.com", "mail.example.com", "localhost", "192.168.1.1" };

        for (String hostname : hostnames) {
            ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {

# it through port 9000.
services:
  minio1:
    <<: *minio-common
    hostname: minio1
    volumes:
      - data1-1:/data1
      - data1-2:/data2

  minio2:
    <<: *minio-common
    hostname: minio2
    volumes:
      - data2-1:/data1
      - data2-2:/data2

  minio3:
    <<: *minio-common
    hostname: minio3
    volumes:
      - data3-1:/data1
      - data3-2:/data2

  minio4:

                // State has changed
                return true;
            }

            @Override
            public String getHostname() {
                return "test-hostname";
            }
        };

        FessConfig fessConfig = createTestFessConfig();

        // Register components
        ComponentUtil.register(searchEngineClient, "searchEngineClient");

    /**
     * Connect to a remote RDMA endpoint
     *
     * @param hostname remote hostname or IP address
     * @param port remote port number
     * @return established RDMA connection
     * @throws IOException if connection fails
     */
    RdmaConnection connect(String hostname, int port) throws IOException;

    /**
     * Register memory region for RDMA operations
     *

    }

    @Test
    @DisplayName("Should handle null hostname in getByName")
    void testGetByNameWithNull() {
        // When/Then
        assertThrows(UnknownHostException.class, () -> {
            nameServiceClient.getByName(null);
        }, "Should throw UnknownHostException for null hostname");
    }

    @Test
    @DisplayName("Should handle empty hostname in getByName")
    void testGetByNameWithEmpty() {

            final int localPort, final String hostName, final boolean nonPooled) {
        return getSmbTransport(tc, address, port, localAddr, localPort, hostName, nonPooled, false);
    }

    @Override
    public SmbTransportImpl getSmbTransport(final CIFSContext tc, final Address address, int port, final InetAddress localAddr,
            final int localPort, final String hostName, final boolean nonPooled, final boolean forceSigning) {

        return new TcpRdmaConnection(remote, local);
    }

    @Override
    public RdmaConnection connect(String hostname, int port) throws IOException {
        InetSocketAddress remoteAddress = new InetSocketAddress(hostname, port);
        RdmaConnection connection = createConnection(remoteAddress, null);
        connection.connect();
        return connection;
    }

    @Override

        ensureInitialized();
        return new DisniRdmaConnection(remote, local, endpointGroup);
    }

    @Override
    public RdmaConnection connect(String hostname, int port) throws IOException {
        InetSocketAddress remoteAddress = new InetSocketAddress(hostname, port);
        RdmaConnection connection = createConnection(remoteAddress, null);
        connection.connect();
        return connection;
    }

    @Override