post请求不通过，json格式正确，问题已定位

Question

发送post请求报错

报错：Failed to execute POST request

问题相关代码，请勿粘贴截图

            Map<String,Object> params = new HashMap<String, Object>();
            params.put("systemName","root");
            String param = JSONUtils.toJSON(params);
            log.info(">>>调用接口param，JSON参数:{}", param);
            Map<String,String> headers = new HashMap<>();
            headers.put("Content-Type", "application/json");
            headers.put("Connection", "keep-alive");
            log.info(">>>headers，结果：{}", headers);
            HttpUtils.HttpServiceResponse response = null;
            String url = HostUrl;
            log.info(">>>地址，结果：{}", url);
            response = HttpUtils.post(url, headers, param);
            log.info(">>>调用接口返回response.getResponseText()，结果：{}", response.getResponseText());

public static HttpServiceResponse post(String url, Map<String, String> headers, String text) {
        CloseableHttpClient httpclient = createHttpClient(url);
        // 设置连接超时时间、请求获取数据超时时间
        RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(5000).build();

        HttpPost postRequest = new HttpPost(url);
        postRequest.setConfig(requestConfig);
        if (headers != null) {
            for (Map.Entry<String, String> entry : headers.entrySet()) {
                postRequest.setHeader(entry.getKey(), entry.getValue());
            }
        }
        if (text != null && !text.isEmpty()) {
            postRequest.setEntity(new StringEntity(text, "utf-8"));
        }
        logger.debug("execute POST request '{}' wiht headers '{}' and data: {}", url, headers, text);

        try {
            return getResponse(postRequest, httpclient.execute(postRequest));
        } catch (IOException e) {
            throw new HttpServiceException("Failed to execute POST request: " + url, e);
        }
    }

运行结果及报错内容

response = HttpUtils.post(url, headers, param);
现在是确定在这个位置错误
在这里执行不过去：Failed to execute POST request

我的解答思路和尝试过的方法

暂时未找到原因
现在是发送json格式没问题。

我想要达到的结果

调用接口： String url = HostUrl;时，能够postman发送成功，现在是本地运行代码，用本地地址127.0.0.1:8835时response = HttpUtils.post(url, headers, param);可以调通，能够调用此接口，但是在上环境后，response = HttpUtils.post(url, headers, param);此处调不通

Answer 1

可以参考以下几个方向进行定位:
1.请求的url所在服务器是不是指定访问的ip,如果是的话可以放开ip限制.
2.定位日志信息,打印一下具体的异常信息.

throw new HttpServiceException("Failed to execute POST request: " + url, e);

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