@GetMapping("/distro/client")
    public ObjectNode getResponsibleServer4Client(@RequestParam String ip, @RequestParam String port) {
        ObjectNode result = JacksonUtils.createEmptyJsonNode();
        String tag = ip + InternetAddressUtil.IP_PORT_SPLITER + port;
        result.put("responsibleServer", distroMapper.mapSrv(tag));
        return result;
    }
@Test
    void testGetResponsibleServer4Client() {
        Mockito.when(distroMapper.mapSrv(Mockito.anyString())).thenReturn("test");
        ObjectNode objectNode = operatorController.getResponsibleServer4Client("test", "test");
        assertEquals("test", objectNode.get("responsibleServer").asText());
    }