Unable to find ConnectionFactory, are you missing RabbitMQ assembly

[ndrscrls]

I just updated from the latest stable version of the Rabbit connector(1.0.0) to 1.0.1-dev-00110 to be able to use the connector with SSL, and I'm getting the following error when trying to register the Rabbit connection:

Unable to find ConnectionFactory, are you missing RabbitMQ assembly at Steeltoe.CloudFoundry.Connector.Rabbit.RabbitProviderServiceCollectionExtensions.DoAdd(IServiceCollection services, RabbitServiceInfo info, IConfiguration config, ServiceLifetime contextLifetime) at Steeltoe.CloudFoundry.Connector.Rabbit.RabbitProviderServiceCollectionExtensions.AddRabbitConnection(IServiceCollection services, IConfiguration config, ServiceLifetime contextLifetime, ILoggerFactory logFactory)

I'm using .netcore on an asp.net webapi application. I do have the RabbitMq nuget package installed. Any thoughts? Thanks.

[dtillman]

@ndrscrls : With the 1.0.1 release of the Rabbit connector, you will need to add the RabbitMQ Client as a dependency in your applications .csproj file... The 1.0.0 Steeltoe connector had the dependency included in it, so you would automatically get the dependency when you did a restore on your app.

With 1.0.1, we have disconnected the dependency, so you will need to explicitly add "RabbitMQ.Client" to your apps dependency. The good news, you can choose the version of the Rabbit Client code you pick with this new approach.... Have a look at Rabbit.csproj .... https://github.com/SteeltoeOSS/Samples/blob/dev/Connectors/src/AspDotNetCore/Rabbit/Rabbit.csproj

Also, you might run into certificate validation errors if you are using self-signed certs... see brute force code in sample for disabling cert validation: https://github.com/SteeltoeOSS/Samples/blob/dev/Connectors/src/AspDotNetCore/Rabbit/Controllers/RabbitController.cs

[ndrscrls]

@dtillman Thanks, I do have the reference to RabbitMQ in my project, it looks like this: `

<PackageReference Include="Microsoft.AspNetCore" Version="1.1.1" />
<PackageReference Include="Microsoft.AspNetCore.Mvc" Version="1.1.2" />
<PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="1.1.1" />
<PackageReference Include="Steeltoe.CloudFoundry.Connector.MySql" Version="1.0.0" />
<PackageReference Include="Steeltoe.CloudFoundry.Connector.Rabbit" Version="1.0.1-dev-00110" />
<PackageReference Include="RabbitMQ.Client" Version="4.1.3" />

`

It still fails with the same error.

[dtillman]

@ndrscrls : Not sure this is it but could you try and update the MySql connector to 1.0.1 as well. You will need to explicitly add the MySql dependencies to your app as well, just like the Rabbit dependency.

For example if you are using EFCore with MySql you will need :

or if you want to use the Pomelo EFCore option:

See the MySQL samples on the dev branch for example .csproj files.

Let me know your findings... and thanks for testing this. Dave

[jquintero33]

Looks like the issue is occurring due to the AssemblyLoadContext.Default.LoadFromAssemblyName(new AssemblyName(name)); call in Steeltoe.CloudFoundry.Connector.ConnectorHelpers.FindAssembly. Using Assembly a = Assembly.Load(new AssemblyName(name)); instead fixes the issue.

[dtillman]

@jquintero33 : Thanks... are you running your app on .NET Core and on WIndows or Linux? Dave

[jquintero33]

.NET Core on windows in development and Linux in production.

[dtillman]

@jquintero33 : Connector fails to find assembly on both WIndows and Linux?

[jquintero33]

Yes, it fails on both. We are using .Net Core 1.0.1.

[dtillman]

@jquintero33 :

Thanks for reporting ... the AssemblyLoadContext.Default.LoadFromAssemblyName() works fine on 1.1 of .NET Core, but fails on 1.0.1 .NET Core...

I've updated the code so to support 1.0.1 of .NET Core ... its in nuget 1.0.1-dev-112.

Dave

[jquintero33]

It's working now. One thing to note is I had to set the Ssl.Version property on the connection factory otherwise you get an SSL handshake error. I appreciate your help with this, thanks!

[dtillman]

Great.. thanks for reporting.