ASP.NET Identity does not authenticate user after successful sign in

Question

I am using using the "default" authentication code generated by Visual Studio, at the creation of a new project.

The authentication (using local accounts) goes well... in most of the cases. In some cases (I cannot establish a pattern), even if the result of the sign-in is "success", the user does not appear to be authenticated and it's not being redirected to the start page. This is the code:

// Validate the user password
var manager = Context.GetOwinContext().GetUserManager<ApplicationUserManager>();
var signinManager = Context.GetOwinContext().GetUserManager<ApplicationSignInManager>();
var result = signinManager.PasswordSignIn(Email.Text, Password.Text, true, shouldLockout: false);
switch (result)
{                   
    case SignInStatus.Success:
         BLL.HelperMethods.LogInfo("Inside 'switch', on branch 'Success'"); 
         IdentityHelper.RedirectToReturnUrl(Request.QueryString["ReturnUrl"], Response);                       
         break;
    ...
}

I can see in the log file that the result of the authentication is success. Even so, the page is not being redirected and the user is not being authenticated.

Thank you.

LATER EDIT:

I think that the following error, which appears from time to time is related to this problem:

EXCEPTION TYPE: System.Web.HttpException
EXCEPTION MESSAGE: Server cannot append header after HTTP headers have been sent.
SOURCE: Global.asax.cs -> Application_Error
STACK TRACE:    at System.Web.HttpHeaderCollection.SetHeader(String name, String value, Boolean replace)
   at System.Web.HttpHeaderCollection.Set(String name, String value)
   at Microsoft.Owin.Host.SystemWeb.CallHeaders.AspNetResponseHeaders.Set(String key, String[] values)
   at Microsoft.Owin.Host.SystemWeb.CallHeaders.AspNetResponseHeaders.set_Item(String key, String[] value)
   at Microsoft.Owin.Infrastructure.OwinHelpers.SetHeaderUnmodified(IDictionary`2 headers, String key, String[] values)
   at Microsoft.Owin.Infrastructure.OwinHelpers.AppendHeaderUnmodified(IDictionary`2 headers, String key, String[] values)
   at Microsoft.Owin.HeaderDictionary.AppendValues(String key, String[] values)
   at Microsoft.Owin.Infrastructure.ChunkingCookieManager.AppendResponseCookie(IOwinContext context, String key, String value, CookieOptions options)
   at Microsoft.Owin.Security.Cookies.CookieAuthenticationHandler.<ApplyResponseGrantAsync>d__f.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Owin.Security.Infrastructure.AuthenticationHandler.<ApplyResponseCoreAsync>d__b.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Owin.Security.Infrastructure.AuthenticationHandler.<ApplyResponseAsync>d__8.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Owin.Security.Infrastructure.AuthenticationHandler.<TeardownAsync>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware`1.<Invoke>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNet.Identity.Owin.IdentityFactoryMiddleware`2.<Invoke>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNet.Identity.Owin.IdentityFactoryMiddleware`2.<Invoke>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNet.Identity.Owin.IdentityFactoryMiddleware`2.<Invoke>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContextStage.<RunApp>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.<DoFinalWork>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.StageAsyncResult.End(IAsyncResult ar)
   at Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.EndFinalWork(IAsyncResult ar)
   at System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Answer 1

I have found another question which describes the same problem. AND some workarounds. It seems to be a bug. You can find the solution here - ASP.NET_SessionId + OWIN Cookies do not send to browser