ServiceStack 4 C# client async call hangs

Question

I am using ServiceStack 4 client to access a RESTful api endpoint. I have written two methods to return a list of objects. The synchronize method returns data as expected. The async methods hangs on the line :

var response = await client.GetAsync<List<Debtor>>("api/Debtor");

This is how my methods are defined:

    public async Task<List<Debtor>> GetDebtorsAsync()
    {
        var debtors = new List<Debtor>();

        try
        {
            var client = new JsonServiceClient(GlobalSingleton.ServerURI);
            var response = await client.GetAsync<List<Debtor>>("api/Debtor");
            debtors = response;
        }
        catch (Exception ex)
        {
            throw;
        }
        return debtors;
    }

    List<Debtor> IDebtorDal.GetDebtors()
    {
        var debtors = new List<Debtor>();

        try
        {
            var client = new JsonServiceClient(GlobalSingleton.ServerURI);
            var response = client.Get<List<Debtor>>("api/Debtor");
            var r = response.GetResponseStatus();
            debtors = response;
        }
        catch (Exception ex)
        {
            var x = ex.Message;
            throw;
        }
        return debtors;
    }

Answer 1

The ServiceStack Service Clients should only be used for calling ServiceStack Services . You can use HTTP Utils for calling 3rd party (ie non-ServiceStack) services.

The JsonServiceClient uses .NET's HttpWebRequest which has a default limit on the number of concurrent HTTP Requests to a single domain which you can increase with:

ServicePointManager.DefaultConnectionLimit = n;

Alternatively for async requests you can use JsonHttpClient instead which is built on Microsoft's newer HttpClient which doesn't have these limits.