Azure-cosmos-dotnet-v3: Could not load file or assembly Microsoft.Azure.Cosmos.Direct, Version=3.0.0.33

[engbibi]

Describe the bug
Self contained and docker build won't start throwing FileNotFoundException: Could not load file or assembly 'Microsoft.Azure.Cosmos.Direct, Version=3.0.0.33, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
'

Environment summary
SDK Version: Microsoft.Azure.Cosmos 3.0.0.18-preview
Microsoft.NETCore 3.0.0-preview6

[hendriksteinhorst]

same here, got the error on dev ops build agent (hosted Ubuntu 1604). Works fine on local build.
netcoreapp2.2

[BrianVallelunga]

I'm seeing the same issue when trying to publish to Azure. I get a FileNotFoundException. This works fine locally however, so it was a surprise.

Using: netcoreapp2.2
SDK Version: Microsoft.Azure.Cosmos 3.0.0.18-preview

[fuocor]

Same problem running in xunit

[BrianVallelunga]

Is there a workaround for this? I'm surprised that the preview was released without working at all when hosted in Azure. Or perhaps it's a configuration setting of some sort?

[ealsur]

@BrianVallelunga What is your deployment method? Our test pipeline runs on Azure DevOps, so we do restores on a daily basis of the Direct package.
Do you run Nuget restore as part of that pipeline? What is the Nuget version being used?

[BrianVallelunga]

@ealsur Currently I'm just right-click deploying from VS to an App Service. I was thinking maybe it's something to do with the App Service configuration. My csproj looks like this:

```


netcoreapp2.2
true
Latest
false

```

I'll add that I did not have this issue with preview 17.

[ealsur]

@BrianVallelunga Are you deploying on App Service that uses Linux instances?

[ealsur]

I created a NET Core 2.2 Web App and published to a Linux App Service, but I cannot seem to run into the issue.

[BrianVallelunga]

@ealsur No, Windows. I'll retry everything tomorrow and see what happens. I even fully deleted the contents of the App Service directory to ensure no conflicting files.

Looking at the deployment settings, I have:

Configuration: Release
Target Framework: netcoreapp2.2
Deployment Mode: Framework-Dependent
Target Runtime: Portable

[BrianVallelunga]

The files that are showing as being deployed (besides my app's dlls) are as follows:

And the Microsoft.Azure.Cosmos.Direct file properties (that I manually downloaded from the deployment) are:

I've tried both the 32 and 64 bit settings and that does nothing either. The exact error message is:

[Error] Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware: An exception was thrown attempting to execute the error handler.System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.Azure.Cosmos.Direct, Version=3.0.0.33, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.File name: 'Microsoft.Azure.Cosmos.Direct, Version=3.0.0.33, Culture=neutral, PublicKeyToken=31bf3856ad364e35'at Microsoft.Azure.Cosmos.CosmosClient..ctor

[BrianVallelunga]

@ealsur I've attached a reproducible sample of a basic ASP.NET Core 2.2 project that shows the behavior when deployed to an Azure App Service, but not when debugging locally. It's basically File -> New Project with an injected CosmosDbService. Hitting the URL at /api/values will show the issue, which seems to happen in the in the CosmosDbService constructor on line 26.

Cosmos3Test.zip

[christopheranderson]

@ausfeldt will take a look at this. Thank you for a full code repro.

[ealsur]

@BrianVallelunga @engbibi Was it working before updating to the latest version? If so, which is the version you were using before?

[ausfeldt]

Seems prior version worked. Looking into it now.

[MikeyMCZ]

3.0.0.17 version is working for me. I haven't checked 3.0.0.19.
I've noticed that the dll is removed during publish phase. Even locally if you do dotnet publish then the file is not in the output folder.

[paul-shell]

This seems to be working again on 19 😊

[BrianVallelunga]

Yes, 19 seems to fix the problem for me as well. Thanks.

[kirankumarkolli]

19 and RC were validated to work.
In RC the packaging was little different and validated on both Windows & Linux to work.
Closing the issue for now.

Please re-open in-case needed.

[chad-chronotek]

I am using 3.0.0-preview7.19362.6 in a simple proof of concept project where I am attempting to add an entity to the context and I am getting this exception on the .Add(entity) call:

Exception thrown: 'System.IO.FileNotFoundException' in System.Private.CoreLib.dll An unhandled exception of type 'System.IO.FileNotFoundException' occurred in System.Private.CoreLib.dll Could not load file or assembly 'Microsoft.Azure.Cosmos.Direct, Version=3.0.0.33, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.

[ealsur]

@chad-chronotek Could you update the SDK package to the latest version? The package has already GAed, you don't need to use the preview.

[chad-chronotek]

I just realized this original issue was with the Cosmos DB SDK team, I am using the EF Core Cosmos provider and getting this error which I believe is still only in preview right? I will post this over on their side, sorry about that...