Warning: Only got partial types from assembly: Microsoft.Azure.WebJobs.Extensions.Storage

Question

I've got a simple .NET V3 WebJob with a timer trigger up and running in a .NET website as outlined in this answer: Scheduled .NET WebJob V3 example

However, in the output, I get this warning:

warn: Host.Startup[0] Warning: Only got partial types from assembly: Microsoft.Azure.WebJobs.Extensions.Storage, Version=3.0.6.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 The following loader failures occured when trying to load the assembly: - Could not load file or assembly 'System.ComponentModel.Annotations, Version=4.2.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified. - Method 'Commit' in type 'Microsoft.Azure.WebJobs.Host.Blobs.Bindings.DelegatingCloudBlobStream' from assembly 'Microsoft.Azure.WebJobs.Extensions.Storage, Version=3.0.6.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' does not have an implementation. - Method 'Commit' in type 'Microsoft.Azure.WebJobs.Host.Blobs.Bindings.DelegatingCloudBlobStream' from assembly 'Microsoft.Azure.WebJobs.Extensions.Storage, Version=3.0.6.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' does not have an implementation. - Method 'Commit' in type 'Microsoft.Azure.WebJobs.Host.Blobs.Bindings.DelegatingCloudBlobStream' from assembly 'Microsoft.Azure.WebJobs.Extensions.Storage, Version=3.0.6.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' does not have an implementation. - Method 'Commit' in type 'Microsoft.Azure.WebJobs.Host.Blobs.Bindings.DelegatingCloudBlobStream' from assembly 'Microsoft.Azure.WebJobs.Extensions.Storage, Version=3.0.6.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' does not have an implementation. - Could not load type 'Microsoft.WindowsAzure.Storage.Table.TableQuerySegment' from assembly 'Microsoft.WindowsAzure.Storage, Version=9.3.2.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. This can occur if the assemblies listed above are missing, outdated or mismatched. Exception message: System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information. at System.Reflection.RuntimeModule.GetTypes(RuntimeModule module) at System.Reflection.RuntimeModule.GetTypes() at System.Reflection.Assembly.GetTypes() at Microsoft.Azure.WebJobs.Host.Indexers.DefaultTypeLocator.FindTypes(Assembly assembly, IEnumerable`1 extensionAssemblies) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Indexers\DefaultTypeLocator.cs:line 115

It's an open issue on GitHub (https://github.com/Azure/azure-webjobs-sdk/issues/2060). Does anyone have a fix?

More importantly, does it affect functionality in any way? The GitHub issue OP said no, but it would be good to have someone confirm this.

Answer 1

Install package "Microsoft.Azure.WebJobs.Host.Storage" Version="4.1.0" to fix this error.

Also, to avoid any confusion, before I fixed this, the error message in the original question, due to package updates, had become the following:

warn: Host.Startup[0]
  Warning: Only got partial types from assembly: Microsoft.Azure.WebJobs.Host.Storage, Version=4.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
  The following loader failures occured when trying to load the assembly:
     - Method 'LogFunctionStarted' in type 'WebJobs.Host.Storage.Logging.PersistentQueueLogger' from assembly 'Microsoft.Azure.WebJobs.Host.Storage, Version=4.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' does not have an implementation.
  This can occur if the assemblies listed above are missing, outdated or mismatched.
  Exception message: System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
     at System.Reflection.RuntimeModule.GetTypes(RuntimeModule module)
     at System.Reflection.Assembly.GetTypes()
     at Microsoft.Azure.WebJobs.Host.Indexers.DefaultTypeLocator.FindTypes(Assembly assembly, IEnumerable`1 extensionAssemblies) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Indexers\DefaultTypeLocator.cs:line 115