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I am getting System.Net.WebException on the connection to a Enterpise portal when deploying as a .DLL

CraigSchellenbach1

I use the same code that I use in a Windows application to get the credentials for our portal. When I use the code in a .DLL I get a System.Net.WebException and the connection is refused. This just started happening and was functioning before. I haven't made any code changes to the connection for the portal. I will paste below.

Does anyone have any ideas? This library is used in a plugin for AutoCAD and hasn't had any issues till this last week. I started a brand new project and I am getting the same error.

The connection is as follows.

var cred = await Esri.ArcGISRuntime.Security.AuthenticationManager.Current.GenerateCredentialAsync(
new Uri("https://ourportal/arcgis/sharing/rest"),
"xyz",
"xyz") as ArcGISTokenCredential;

I thought I might be missing a reference but it looks okay in my config.

<?xml version="1.0" encoding="utf-8"?>
<packages>
<package id="Esri.ArcGISRuntime" version="100.8.0" targetFramework="net472" />
<package id="Esri.ArcGISRuntime.WPF" version="100.8.0" targetFramework="net472" />
<package id="Newtonsoft.Json" version="12.0.3" targetFramework="net472" />
</packages>

Is there any setting that I am missing or that it might of gotten changed to now get the connection refused from our portal? This same code works in applications that are built as stand alone applications.

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SomeGISGuy

The the SSL certificate expire on your server?

CraigSchellenbach1

I will double check but why would it work in one application but not as a library?

CraigSchellenbach1

I checked and it is still valid. What is also strange is I can build a library then use it any Windows application and it works, but when I use it in this library it gives the exception.

CraigSchellenbach1

Does anyone have suggestions? The code works in a Windows application but in a class library I am getting a WebException and the connection is closed trying to get a token.

SomeGISGuy

I'm not sure what you mean by it not working when in a DLL. Applications needs an executable to run. There really shouldn't be any difference between putting the code in an executable, or having an executable call the same code in an assembly. Have you tried copying that code to the executable part and test if that works? I'm guessing the execution context might be different from the application that you got it working in. It's not unlikely that the application that is executing your assembly could be doing something to mess up your code.

It might also be helpful to look at the exception, its stacktrace, as well as if that exception has an InnerException property populated, look at its message and stacktrace.

CraigSchellenbach1

My project is a Class Library. It is loaded into AutoCAD and it will pull survey data and images. This was working for over a year but I upgraded some of the capabilities and I now it doesn't work. If I use the same code in a windows application it works flawlessly but when used as a DLL I get these errors on the .Wait statement.

It errors on this line.

var cred = await Esri.ArcGISRuntime.Security.AuthenticationManager.Current.GenerateCredentialAsync(
new Uri("https://gis.adb-us.com/arcgis/sharing/rest"),
userName,
password) as ArcGISTokenCredential;

I have taken the code out and created its own library and used that in a windows application and it works fine, but if I call it from this class library project I get the same error.

I am guessing that I am missing a reference somewhere, it's missing an assembly, or that I need to a different approach to get credentials being that it is in a library.

System.AggregateException
HResult=0x80131500
Message=One or more errors occurred.
Source=mscorlib
StackTrace:
at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
at System.Threading.Tasks.Task.Wait()
at ADBAutoCAD.QCForm.OpenedForm(String s, String fqnid) in C:\Users\cschellenbach\source\repos\ADBAutoCADPlugIn\ADBAutoCADPlugIn\QCForm.cs:line 53
at ADBAutoCAD.Form1.button6_Click(Object sender, EventArgs e) in C:\Users\cschellenbach\source\repos\ADBAutoCADPlugIn\ADBAutoCADPlugIn\Form1.cs:line 614
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Inner Exception 1:
HttpRequestException: An error occurred while sending the request.

Inner Exception 2:
WebException: The underlying connection was closed: An unexpected error occurred on a send.

Inner Exception 3:
IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.

Inner Exception 4:
SocketException: An existing connection was forcibly closed by the remote host

SomeGISGuy

Could you supply the stack trace from the inner exception?
Also the call-stack seem to indicate you are using .Wait() instead of 'await' ? That's a blocking call and should never be used in a multi-threaded application, as you can deadlock the entire process.

There's also issues with the plugin model if multiple plugins use different versions of ArcGIS Runtime. I believe AutoCAD has their own plugin that also includes (an older version of) ArcGIS Runtime, and if that's a different version there are currently issues with getting a plugin it to use the correct version (first one to load wins).

When the app crashes, try and go to Debug -> Modules and check which esri assemblies are loaded in memory, and verify that the path is what you expect.

Your exception and callstack doesn't initially seem to indicate that's the actual issue, but that's why I want to double-check by understanding the callstacks of the inner exceptions.

CraigSchellenbach1

I tried to connected to the portal and I am getting the same issue.

ArcGISPortal portal = await ArcGISPortal.CreateAsync(new Uri("https://gis.ourportal.com/arcgis/sharing/rest"));

I am not understanding why it works in a Windows application but once used as a DLL it won't. This code worked for over a year but not it doesn't. I don't know if it is missing a reference somewhere or I upgraded to a newer version of the Runtime.

Any advice or suggestion would be very much appreciated.

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