Error hosting asp.core 2.0 webapi in IIS

Question

I have developed asp.net core 2.0 webapi and hosting in IIS. I installed the hosting bundle as mentioned in Hosting Bundle Installation

But for some reason i am getting the following error:

An error occurred while starting the application.

.NET Core 4.6.25815.02 X64 v4.0.0.0    |   Microsoft.AspNetCore.Hosting version 2.0.0-rtm-26452    |    Microsoft Windows 6.1.7601 S

Some of the error lines in stdout...

warn: Microsoft.AspNetCore.DataProtection.Repositories.EphemeralXmlRepository[50]
      Using an in-memory repository. Keys will not be persisted to storage.
warn: Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager[59]
      Neither user profile nor HKLM registry available. Using an ephemeral key repository. Protected data will be unavailable when application exits.
warn: Microsoft.AspNetCore.DataProtection.Repositories.EphemeralXmlRepository[50]
      Using an in-memory repository. Keys will not be persisted to storage.
warn: Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager[59]
      Neither user profile nor HKLM registry available. Using an ephemeral key repository. Protected data will be unavailable when application exits.
warnwarn: Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager[35]
      No XML encryptor configured. Key {973e8bbf-2ca5-4c7f-a2ac-2672c9bb8041} may be persisted to storage in unencrypted form.
: Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager[35]
      No XML encryptor configured. Key {973e8bbf-2ca5-4c7f-a2ac-2672c9bb8041} may be persisted to storage in unencrypted form.
Hosting environment: Production
Content root path: C:\Elay\PublishOutput
Now listening on: http://localhost:30127
Application started. Press Ctrl+C to shut down.
fail: Microsoft.EntityFrameworkCore.Database.Connection[200004]

Any help?

Seems like an error in EF, Please check this vivekthangaswamy.blogspot.com/2017/08/… — Jonathan Alfaro
– Jonathan Alfaro, Commented Nov 29, 2017 at 15:08
Also please check the answer here stackoverflow.com/questions/45941707/… — Jonathan Alfaro
– Jonathan Alfaro, Commented Nov 29, 2017 at 15:09
Thanks. i am using the database on the same machine where i have iis. so dont think it is connection issue. — Mukil Deepthi
– Mukil Deepthi, Commented Nov 29, 2017 at 15:10
Well, it is a connection issue, since that's the failure message you're getting. Perhaps the connection string is wrong/not set properly. — Chris Pratt
– Chris Pratt, Commented Nov 29, 2017 at 15:28
@Darkonekt you are right , it is due to wrong connection. Thanks — Mukil Deepthi
– Mukil Deepthi, Commented Nov 30, 2017 at 10:41

ekhanna · Accepted Answer · 2018-01-25 19:49:16Z

4

There are a couple of settings you can add on to the WebHost.CreateDefaultBuilder() method that will show detailed error messages instead of generic one when hosting .NET Core 2 apps in IIS.

.UseSetting("detailedErrors", "true")

.CaptureStartupErrors(true)

edited Jan 25, 2018 at 19:49

answered Jan 8, 2018 at 22:55

ekhanna

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Mukil Deepthi · Accepted Answer · 2017-11-30 10:40:40Z

2

This was due to wrong connection details. It works fine with the correct credentials. thanks

answered Nov 30, 2017 at 10:40

Mukil Deepthi

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2 Comments

Piotr Kula Over a year ago

Can you share what was wrong? We have the same issue but I swear it was working before we republished and now not.. the connection string looks OK

monty Over a year ago

I would also be interested what needs to be changed in order to remove this warnings.

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