InitializeServiceClient ServiceClient<T> mismatch exception when adding to list

[danielkboyer]

Describe the bug
I am using Azure Data Factory management client and trying to connect to it through an azure functions app. It seems like when initializing the service client I get an invalid type when it tries to add to the array.

Exception or Stack Trace
"Exception while executing function: ScheduleNotifications -> Attempted to access an element as a type incompatible with the array.",
"errorDetails": "Microsoft.Azure.WebJobs.Host.FunctionInvocationException : Exception while executing function: ScheduleNotifications ---> System.ArrayTypeMismatchException : Attempted to access an element as a type incompatible with the array.\r\n at System.Collections.Generic.List1.Add(T item)\r\n at Microsoft.Azure.Management.DataFactory.DataFactoryManagementClient.Initialize()\r\n at Microsoft.Azure.Management.DataFactory.DataFactoryManagementClient..ctor(DelegatingHandler[] handlers)\r\n at Microsoft.Azure.Management.DataFactory.DataFactoryManagementClient..ctor(ServiceClientCredentials credentials,DelegatingHandler[] handlers)\r\n at DataFactorySDK.FactoryAuth.GetClient() at C:\\Users\\dedaq\\source\\repos\\DataFactorySDK\\DataFactorySDK\\FactoryAuth.cs : 44\r\n at ScheduleBatch.ScheduleNotifications.ScheduleDelivery(String location,String deliveryDate,String filePath,List1 intervals,TraceWriter log)\r\n at async ScheduleBatch.ScheduleNotifications.Run(HttpRequestMessage req,TraceWriter log)\r\n at async Microsoft.Azure.WebJobs.Host.Executors.FunctionInvoker2.InvokeAsync[TReflected,TReturnValue](Object instance,Object[] arguments)\r\n at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.InvokeAsync(IFunctionInvoker invoker,ParameterHelper parameterHelper,CancellationTokenSource timeoutTokenSource,CancellationTokenSource functionCancellationTokenSource,Boolean throwOnTimeout,TimeSpan timerInterval,IFunctionInstance instance)\r\n at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithWatchersAsync(IFunctionInstance instance,ParameterHelper parameterHelper,TraceWriter traceWriter,CancellationTokenSource functionCancellationTokenSource)\r\n at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(??)\r\n at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(??) \r\n End of inner exception\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(??)\r\n at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.TryExecuteAsync(IFunctionInstance functionInstance,CancellationToken cancellationToken)\r\n at Microsoft.Azure.WebJobs.Host.Executors.ExceptionDispatchInfoDelayedException.Throw()\r\n at async Microsoft.Azure.WebJobs.JobHost.CallAsync(??)\r\n at async Microsoft.Azure.WebJobs.Script.ScriptHost.CallAsync(String method,Dictionary2 arguments,CancellationToken cancellationToken)\r\n at async Microsoft.Azure.WebJobs.Script.WebHost.WebScriptHostManager.HandleRequestAsync(FunctionDescriptor function,HttpRequestMessage request,CancellationToken cancellationToken)\r\n at async Microsoft.Azure.WebJobs.Script.Host.FunctionRequestInvoker.ProcessRequestAsync(HttpRequestMessage request,CancellationToken cancellationToken,WebScriptHostManager scriptHostManager,WebHookReceiverManager webHookReceiverManager)\r\n at async Microsoft.Azure.WebJobs.Script.WebHost.Controllers.FunctionsController.<>c__DisplayClass3_0.b__0(??)\r\n at async Microsoft.Azure.WebJobs.Extensions.Http.HttpRequestManager.ProcessRequestAsync(HttpRequestMessage request,Func`3 processRequestHandler,CancellationToken cancellationToken)\r\n at async Microsoft.Azure.WebJobs.Script.WebHost.Controllers.FunctionsController.ExecuteAsync(HttpControllerContext controllerContext,CancellationToken cancellationToken)\r\n at async System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsync(HttpRequestMessage request,CancellationToken cancellationToken)\r\n at async System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsync(HttpRequestMessage request,CancellationToken cancellationToken)\r\n at async Microsoft.Azure.WebJobs.Script.WebHost.Handlers.WebScriptHostHandler.SendAsync(HttpRequestMessage request,CancellationToken cancellationToken)\r\n at async Microsoft.Azure.WebJobs.Script.WebHost.Handlers.SystemTraceHandler.SendAsync(HttpRequestMessage request,CancellationToken cancellationToken)\r\n at async System.Web.Http.HttpServer.SendAsync(HttpRequestMessage request,CancellationToken cancellationToken)"

To Reproduce
Try to create an Azure Data Factory Client inside of an azure function app. Just initialize it with tokens from the azure portal ( I ran it locally and triggered with postman).

Code Snippet

public DataFactoryManagementClient GetClient()
        {
            var context = new AuthenticationContext("https://login.windows.net/" + tenantID);
            ClientCredential cc = new ClientCredential(applicationId, authenticationKey);
            AuthenticationResult result = context.AcquireTokenAsync(
                "https://management.azure.com/", cc).Result;
            // This is the line that it breaks on... it seems like it's not calling initializeServiceClient with 
           //the right types
            ServiceClientCredentials cred = new TokenCredentials(result.AccessToken);
            return  new DataFactoryManagementClient(cred)
            {
                SubscriptionId = subscriptionId
            };

        }

[danielkboyer]

I fixed this by lowering the version of the azure data factory .net sdk. I think it's a dependency issue associated with azure functions and not with the ServiceClient.

[graham-saunders]

@danielkboyer what version did you downgrade to in the Microsoft.AZure.Search.Data nuget?

[danielkboyer]

@graham-saunders I didn't use Microsoft.Azure.Search.Data nuget but I found that lowering newtonsoft to version 10 fixed it for me, this is inside of a different thread here, my problem was azure functions and not ServiceClient

[graham-saunders]

@danielkboyer thanks for getting back so quickly; that thread was really helpful