ASP 4.0 Errors on Remote Desktop Gateway Server 2019

Question

Hello

We have a 2019 Remote Desktop Gateway server. This morning most users could not login with their connections hanging on the "Securing Remote Desktop" part of the connection. We rebooted the Gateway server and removed\re-added the RDSH servers and that allowed users to connect.

Whilst we were having the problem we were getting lots of "Event ID 3005" errors in the Application Log. After the reboot we're still getting these but less frequently. The text of the error is:

Event code: 3005

Event message: An unhandled exception has occurred.

Event time: 03/09/2024 11:05:46

Event time (UTC): 03/09/2024 10:05:46

Event ID: 84a59781ba4e408a91070fbca76e0882

Event sequence: 1729

Event occurrence: 246

Event detail code: 0

Application information:

Application domain: /LM/W3SVC/1/ROOT/RDWeb/Pages-2-133698269112408744 

Trust level: Full 

Application Virtual Path: /RDWeb/Pages 

Application Path: C:\Windows\Web\RDWeb\Pages\ 

Machine name: PTBM-GW02 

Process information:

Process ID: 5240 

Process name: w3wp.exe 

Account name: IIS APPPOOL\RDWebAccess 

Exception information:

Exception type: NullReferenceException 

Exception message: Object reference not set to an instance of an object.

at Microsoft.TerminalServices.Publishing.Portal.FormAuthentication.TSFormAuthTicketInfo..ctor(HttpContext objHttpContext)

at ASP.en_us_default_aspx.<GetAppsAsync>d__0.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at System.Web.UI.PageAsyncTaskManager.<ExecuteTasksAsync>d__3.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at System.Web.UI.Page.<ProcessRequestAsync>d__554.MoveNext()

Does anyone know how to fix this please? Everyone is logging in OK now although I'm concerned that we'll get back to the same problem.

Thanks

Andy.

Answer 1

Hello,

 

According to your error log, this Remote Desktop Gateway server issue may be related to a NullReferenceException exception in your application.

It is advised to check the following configurations to troubleshoot potential problems:

 

1. Ensure that the latest Windows updates and IIS updates are installed on the server. This helps fix known vulnerabilities and issues.
2. In IIS Manager, locate the application pool corresponding to RD Web, right-click it, and choose Advanced Settings. Make sure.NET Framework Version is set to the version required by the application. In the meantime, select your application and click "Error Page" to enable detailed error messages.
3. Event ID 3005 typically indicates an unhandled exception in ASP.NET. Open the Event Viewer and enable View > Show Analysis and Debug Logs for more details. Navigate to Windows Logs > Applications to find any entries related to event ID 3005.

 

Best regards

Jacen

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