2020-10-21 02:04:55.875  WARN 6763 --- [nio-7424-exec-3] n.g.e.SimpleDataFetcherExceptionHandler  : Exception while fetching data (/textDeepAnalyzer) : org.apache.http.NoHttpResponseException: vpc-4zarhbj33zcjjkqfo3afso45la.cn-1.es.alibaba.com.cn:80 failed to respond

 /**
  * Finally I fix the issue and it is caused by buffer size. By default, buffer size of httpclient is 8k. So I change it to 4k and my code works well.
  * **/
        ConnectionConfig connectionConfig = ConnectionConfig.custom()
                .setBufferSize(4128)
                .build();
        httpClient = HttpClients.custom()
                .setDefaultConnectionConfig(connectionConfig)
                .build();
        HttpResponse httpResponse = httpClient.execute(httpPost);