Unhandled exception reported in Diagnostics, when logging in via Internet Explorer

Legacy Modelling
1

We just recently upgraded to OD 3.11.18.
When we login with Microsoft Internet Explorer (11.0.9600) and using the AD credentials, we are seeing an exception reported in the Configuration/Diagnostics section. Everything seems to be operating correctly and we have the appropriate rights, but it’s unsettling that we are now getting this exception.
Previously, we were using 3.4, and 3.3 before that and never saw such an error in this same IE 11.0.
If I test using this 3.11.18 and login with Chrome (31.0.1650.63) there is no error reported in the diagnostics. This only seems to happen using IE 11.0.

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Unhandled exception from web server processing GET to http://octopusdeploy.americas.cshare.net/{{ ‘~/images/directory_services_signin_buttons/microsoft-logo.svg’ | resolveLink }}: An operation was attempted on a nonexistent network connection
System.Net.HttpListenerException (0x80004005): An operation was attempted on a nonexistent network connection
at System.Net.HttpResponseStream.Write(Byte[] buffer, Int32 offset, Int32 size)
at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder)
at System.IO.StreamWriter.Dispose(Boolean disposing)
at System.IO.StreamWriter.Close()
at Newtonsoft.Json.JsonWriter.System.IDisposable.Dispose()
at Nancy.Serialization.JsonNet.JsonNetSerializer.Serialize[TModel](String contentType, TModel model, Stream outputStream)
at Octopus.Server.Web.OctopusNancyHost.OutputWithDefaultTransferEncoding(Response nancyResponse, HttpListenerResponse response) in Z:\buildAgent\workDir\eec88466c176b607\source\Octopus.Server\Web\OctopusNancyHost.cs:line 359
at Octopus.Server.Web.OctopusNancyHost.ConvertNancyResponseToResponse(NancyContext nancyRequest, Response nancyResponse, HttpListenerResponse response) in Z:\buildAgent\workDir\eec88466c176b607\source\Octopus.Server\Web\OctopusNancyHost.cs:line 342
at Octopus.Server.Web.OctopusNancyHost.Process(HttpListenerContext ctx) in Z:\buildAgent\workDir\eec88466c176b607\source\Octopus.Server\Web\OctopusNancyHost.cs:line 454

–v--v–v--

Can you offer some insight as to what this means and the ramifications? Why are we only seeing this on IE 11.0? And, how we can make it stop?

Thanks

2

Hi Andrew,

Thanks for getting in touch! This is an interesting issue. It is something we have seen around a couple of times, yet our devs have never been able to reliably replicate it on our end and attempt to fix the issue. We believe issue occurs during the page loads in some environments. It occurs because the browser requests an image before the Angular code has finished executing to do the url resolve. Once it does finish, it resolves the url and the image appears. So the user doesn’t really notice anything but this error appears in the server log. We are still trying to track down why this is happening.

http://octopusdeploy.americas.cshare.net/{{ '~/images/directory_services_signin_buttons/microsoft-logo.svg' | resolveLink }}

This causes the error to be logged before the URL is finished loading. As you say, there are no functional issues at the moment with it, but the error is being logged to the Diagnostics still. Currently we have no real ideas on how we resolve the cause of this issue as we are unable to reliably replicate it on our end. As far as we can see, it happens only on IE11 and only in a very few cases.

Let me know if you have any questions.

Best regards,
Daniel

3

Hi Daniel,

Thanks for the honest feedback.

Something else to keep in mind, I’m using an old laptop, running 32 bit Windows 7. Perhaps that can be of help if you’re trying to reproduce.

Andy L.

4

Hi Andy,

No worries at all! Thanks for the extra info, Ill pass it on. :slight_smile:

Best regards,
Daniel