SSAPI operation failed with error - An invalid status code was supplied GSSAPI operation failed with error

[andycode112]

My program has this problem,it is a dotnet core application and running on docker container of linux.
when it request tfs api, I am got a error,How to solve this problem?

the error
One or more errors occurred. (GSSAPI operation failed with error - An invalid status code was supplied (Unknown error).)","Code":"999","DocURL":null,"RequestUri":"/api/CodeVersionCtl/GetProjects","RequestBody":"","Result":"System.AggregateException: One or more errors occurred. (GSSAPI operation failed with error - An invalid status code was supplied (Unknown error).) ---> System.ComponentModel.Win32Exception: GSSAPI operation failed with error - An invalid status code was supplied (Unknown error).\n at System.Net.Security.NegotiateStreamPal.AcquireCredentialsHandle(String package, Boolean isServer, NetworkCredential credentia

The source code
public List GetProjects()
{
string projecturl = "http://...:8080/tfs/defaultcollection/_apis/projects";
HttpClient mywebclient = TfsService.GetHttpClient(projecturl);
var responsemsg = mywebclient.GetAsync(projecturl);
string result = responsemsg.Result.Content.ReadAsStringAsync().Result;
JObject jo = (JObject)JsonConvert.DeserializeObject(result);
List list = JsonConvert.DeserializeObject(jo["value"].ToString());
return list;
}

private static HttpClient GetHttpClient(string url)
{
    var uri = new Uri(url);
    var credentialsCache = new CredentialCache { { uri, "NTLM", new NetworkCredential("user", "pwd", "***.com") } };
    var handler = new HttpClientHandler { Credentials = credentialsCache };
    var httpClient = new HttpClient(handler) { BaseAddress = uri };
    httpClient.DefaultRequestHeaders.ConnectionClose = false;
    httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

    ServicePointManager.FindServicePoint(uri).ConnectionLeaseTimeout = 60 * 1000;  // Close connection after one minutes

    return httpClient;
}

[andycode112]

#Dockerfile
FROM microsoft/dotnet:latest
COPY . /app
WORKDIR /app
EXPOSE 80
ENTRYPOINT ["dotnet", "NN.Service.NNService.Host.dll"]

[MichaelSimons]

This seems like a question well-suited for stack overflow rather than the microsoft/dotnet docker repo. Does the app run outside of a container? Does it work on Linux? The Win32Exception in the call stack is somewhat suspicious in the context of Linux.

Closing as this appears to be an issue with containerizing a specific application rather than a specific issue with the microsoft/dotnet images. If this problem is proven to be something specific to the microsoft/dotnet images, please re-open.

[andycode112]

I have solved this problem and adopted the following https://github.com/dotnet/corefx/issues/28961 ,
Add code AppContext.SetSwitch("System.Net.Http.UseSocketsHttpHandler", false) at ConfigureServices method of Startup class