Unable to load one or more of the requested types - Upgrade to 6.0.0

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1

Hi,

I recently upgrade a project from nSericeBus 5.29 -> 6.0.0. When I try and deploy I get the below error:

[NServiceBus.Endpoint.Install] Unhandled Exception: System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
[NServiceBus.Endpoint.Install]    at System.Reflection.RuntimeModule.GetTypes(RuntimeModule module)
[NServiceBus.Endpoint.Install]    at System.Reflection.Assembly.GetTypes()
[NServiceBus.Endpoint.Install]    at NServiceBus.Hosting.Windows.EndpointTypeDeterminer.<>c.<ScanAssembliesForEndpoints>b__10_0(Assembly assembly) in C:\Build\src\NServiceBus.Hosting.Windows\EndpointTypeDeterminer.cs:line 159
[NServiceBus.Endpoint.Install]    at System.Linq.Enumerable.<SelectManyIterator>d__17`2.MoveNext()
[NServiceBus.Endpoint.Install]    at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
[NServiceBus.Endpoint.Install]    at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
[NServiceBus.Endpoint.Install]    at NServiceBus.Hosting.Windows.EndpointTypeDeterminer.TryGetEndpointConfigurationTypeFromScannedAssemblies(Type& type) in C:\Build\src\NServiceBus.Hosting.Windows\EndpointTypeDeterminer.cs:line 127
[NServiceBus.Endpoint.Install]    at NServiceBus.Hosting.Windows.EndpointTypeDeterminer.GetEndpointConfigurationType(HostArguments arguments) in C:\Build\src\NServiceBus.Hosting.Windows\EndpointTypeDeterminer.cs:line 81
[NServiceBus.Endpoint.Install]    at NServiceBus.Hosting.Windows.EndpointTypeDeterminer.GetEndpointConfigurationTypeForHostedEndpoint(HostArguments arguments) in C:\Build\src\NServiceBus.Hosting.Windows\EndpointTypeDeterminer.cs:line 50
[NServiceBus.Endpoint.Install]    at NServiceBus.Hosting.Windows.Program.Main(String[] args) in C:\Build\src\NServiceBus.Hosting.Windows\HostProgram.cs:line 3

The event viewer logs showed this error:

Application: NServiceBus.Host.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.Reflection.ReflectionTypeLoadException
   at System.Reflection.RuntimeModule.GetTypes(System.Reflection.RuntimeModule)
   at System.Reflection.Assembly.GetTypes()
   at NServiceBus.Hosting.Windows.EndpointTypeDeterminer+<>c.<ScanAssembliesForEndpoints>b__10_0(System.Reflection.Assembly)
   at System.Linq.Enumerable+<SelectManyIterator>d__17`2[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].MoveNext()
   at System.Collections.Generic.List`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]..ctor(System.Collections.Generic.IEnumerable`1<System.__Canon>)
   at System.Linq.Enumerable.ToList[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.Collections.Generic.IEnumerable`1<System.__Canon>)
   at NServiceBus.Hosting.Windows.EndpointTypeDeterminer.TryGetEndpointConfigurationTypeFromScannedAssemblies(System.Type ByRef)
   at NServiceBus.Hosting.Windows.EndpointTypeDeterminer.GetEndpointConfigurationType(NServiceBus.Hosting.Windows.Arguments.HostArguments)
   at NServiceBus.Hosting.Windows.EndpointTypeDeterminer.GetEndpointConfigurationTypeForHostedEndpoint(NServiceBus.Hosting.Windows.Arguments.HostArguments)
   at NServiceBus.Hosting.Windows.Program.Main(System.String[])

I have bindings re-direct in my app.config:

<runtime>
  <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
    <dependentAssembly>
      <assemblyIdentity name="NServiceBus.Core" publicKeyToken="9fc386479f8a226c" culture="neutral" />
      <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
    </dependentAssembly>
    <dependentAssembly>
      <assemblyIdentity name="log4net" publicKeyToken="669e0ddf0bb1aa2a" culture="neutral" />
      <bindingRedirect oldVersion="0.0.0.0-2.0.8.0" newVersion="2.0.8.0" />
    </dependentAssembly>
    <dependentAssembly>
      <assemblyIdentity name="NHibernate" publicKeyToken="aa95f207798dfdb4" culture="neutral" />
      <bindingRedirect oldVersion="0.0.0.0-4.1.0.4000" newVersion="4.1.0.4000" />
    </dependentAssembly>
    <dependentAssembly>
      <assemblyIdentity name="RabbitMQ.Client" publicKeyToken="89e7d7c5feba84ce" culture="neutral" />
      <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
    </dependentAssembly>
    <dependentAssembly>
      <assemblyIdentity name="NServiceBus.Transports.RabbitMQ" publicKeyToken="9fc386479f8a226c" culture="neutral" />
      <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
    </dependentAssembly>
    <dependentAssembly>
      <assemblyIdentity name="Castle.Windsor" publicKeyToken="407dd0808d44fbdc" culture="neutral" />
      <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
    </dependentAssembly>
    <dependentAssembly>
      <assemblyIdentity name="Castle.Core" publicKeyToken="407dd0808d44fbdc" culture="neutral" />
      <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
    </dependentAssembly>
    <dependentAssembly>
      <assemblyIdentity name="Iesi.Collections" publicKeyToken="aa95f207798dfdb4" culture="neutral" />
      <bindingRedirect oldVersion="0.0.0.0-4.0.0.4000" newVersion="4.0.1.4000" />
    </dependentAssembly>
  </assemblyBinding>
</runtime>

My packages.config looks like below:

<package id="Castle.Core" version="4.2.0" targetFramework="net452" />
<package id="Castle.Windsor" version="3.3.0" targetFramework="net452" />
<package id="Iesi.Collections" version="4.0.1.4000" targetFramework="net452" />
<package id="log4net" version="2.0.8" targetFramework="net452" />
<package id="log4net.Ext.Json.1.2.13" version="1.2.13.20140804" targetFramework="net452" />
<package id="Microsoft.Diagnostics.Tracing.EventSource.Redist" version="1.1.28" targetFramework="net452" />
<package id="NHibernate" version="4.0.4.4000" targetFramework="net452" />
<package id="NServiceBus" version="6.0.0" targetFramework="net452" />
<package id="NServiceBus.CastleWindsor" version="6.0.0" targetFramework="net452" />
<package id="NServiceBus.Host" version="7.0.0" targetFramework="net452" />
<package id="NServiceBus.Log4Net" version="2.0.0" targetFramework="net452" />
<package id="NServiceBus.NHibernate" version="7.0.1" targetFramework="net452" />
<package id="NServiceBus.RabbitMQ" version="4.1.0" targetFramework="net452" />
<package id="NServiceBus.Testing" version="6.0.1" targetFramework="net452" />
<package id="RabbitMQ.Client" version="4.1.1" targetFramework="net452" />

I have tried changing the Iesi.Collections as mentioned in one of the other threads (I upgraded from 4.0.0 => 4.0.1) but no luck

2

So it turns out I needed these binding re-directs in the nservicebus.host.exe.config rather than in app.config. Which seems to helped with some issues. Still trying to resolve the others.

3

Correct, binding redirects must be in the config of the host executable which in this case is NServiceBus.Host.exe if you use the host.

Also see:

What other issue do you have?

4

Hi, The other issues were related to miss-match of reference configurations in .csproj and assembly reference and packages.config. Nothing to do with nServiceBus :grinning:

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