问多次调用识别接口的时候，经常会在第二次调用的时候卡住？

本地调试，第一次调用接口可以识别，后续的调用会卡在BizLicenseOCRResponse resp = await client.BizLicenseOCR(req);这里，没有返回，也没有报错。需要重新启动后台接口应用程序和前端web应用程序才能成功。代码如下

using System;

using System.Collections.Generic;

using System.Configuration;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Collections;

using TencentCloud.Common;

using TencentCloud.Common.Profile;

using TencentCloud.Ocr.V20181119;

using TencentCloud.Ocr.V20181119.Models;

using MZSP.API.BLL;

using MZSP.DAL;

using MZSP.Entity;

namespace MZSP.View.BLL.Controls

{

class OCRLicenseControl

{

private async Task<BizLicenseOCRResponse> GetAddress(string pLicenseImgUrl)

{

Credential cred = new Credential

{

SecretId = ConfigurationManager.AppSettings["spSecId"].ToString(),

SecretKey = ConfigurationManager.AppSettings["spSecKey"].ToString()

};

ClientProfile clientProfile = new ClientProfile();

HttpProfile httpProfile = new HttpProfile();

httpProfile.Endpoint = ("ocr.tencentcloudapi.com");

clientProfile.HttpProfile = httpProfile;

OcrClient client = new OcrClient(cred, "ap-guangzhou", clientProfile);

BizLicenseOCRRequest req = new BizLicenseOCRRequest();

string strParams = "{\"ImageUrl\":\"" + pLicenseImgUrl + "\"}";

req = BizLicenseOCRRequest.FromJsonString<BizLicenseOCRRequest>(strParams);

BizLicenseOCRResponse resp = await client.BizLicenseOCR(req);

return resp;

}

private void GetPrivonceCity(string RegNum, ref Tschools school)

{

school.FProvince = TareaBLL.GetInstance().GetOneByID(RegNum.Substring(2, 2)).FAreaName;

school.FCity = TareaBLL.GetInstance().GetOneByID(RegNum.Substring(2, 4)).FAreaName;

school.FCounty = TareaBLL.GetInstance().GetOneByID(RegNum.Substring(2, 6)).FAreaName;

}

public object GetShoolInfoFromLicense(string pLicenseImgUrl)

{

Hashtable hs = new Hashtable();

hs["msg"] = "营业执照识别失败";

hs["flag"] = false;

BizLicenseOCRResponse result = null;

try

{

var t = Task.Run(() =>

{

// 同步方式调用，会卡住直到请求返回

result = GetAddress(pLicenseImgUrl).ConfigureAwait(false).GetAwaiter().GetResult();

});

// 同步等待，会卡住直到线程返回

t.Wait();

Tschools school = new Tschools();

GetPrivonceCity(result.RegNum, ref school);

school.FSchoolName = result.Name;

school.FOwner = result.Person;

school.FAddress = result.Address;

hs["SchoolInfoFromLicense"] = school;

hs["msg"] = "营业执照识别成功";

hs["flag"] = true;

return hs;

}

catch (Exception e)

{

FuncUtility.Utils.WriteErrLogToTxt("营业执照识别失败", e);

hs["msg"] = "营业执照识别失败";

hs["flag"] = false;

return hs;

}

}

}

}