Cosmos DB Trigger Can't Find App Setting for Connection String .net6

Cosmos DB trigger failing to retrieve app setting in Azure. When running locally with an environment variable set on the machine this works fine. When publishing to Azure this

.net6 RC2 Azure Functions v4

Repro steps

Provide the steps required to reproduce the problem

1. Create CosmosDbTrigger function
2. Publish to Azure Functions App, wait for error.

Expected behavior

Trigger should pick up connection string from App Settings and function should be indexed.

Actual behavior

Trigger fails, stating app setting does not exist. Function fails to load

Related information

Error message from Azure logs:

2021-10-17T21:03:29.094 [Error] Error indexing method 'SendJobsUpdatedNotification'Microsoft.Azure.WebJobs.Host.Indexers.FunctionIndexingException : Error indexing method 'SendJobsUpdatedNotification' ---> System.InvalidOperationException : Cannot create container information for JobProgress in database Zeus with lease Leases_JobProgress in database Zeus : Cosmos DB connection configuration 'CosmosDBConnection' does not exist. Make sure that it is a defined App Setting. ---> System.InvalidOperationException : Cosmos DB connection configuration 'CosmosDBConnection' does not exist. Make sure th
   at it is a defined App Setting.at Microsoft.Azure.WebJobs.Extensions.CosmosDB.DefaultCosmosDBServiceFactory.ResolveConnectionInformation(String connection) at C:\azure-webjobs-sdk-extensions\src\WebJobs.Extensions.CosmosDB\Config\DefaultCosmosDBServiceFactory.cs : 45
   at Microsoft.Azure.WebJobs.Extensions.CosmosDB.DefaultCosmosDBServiceFactory.CreateService(String connectionName,CosmosClientOptions) at C:\azure-webjobs-sdk-extensions\src\WebJobs.Extensions.CosmosDB\Config\DefaultCosmosDBServiceFactory.cs : 27
   at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key,Func`2)
   at Microsoft.Azure.WebJobs.Extensions.CosmosDB.CosmosDBExtensionConfigProvider.GetService(String connection,String) at C:\azure-webjobs-sdk-extensions\src\WebJobs.Extensions.CosmosDB\Config\CosmosDBExtensionConfigProvider.cs : 108
   at async Microsoft.Azure.WebJobs.Extensions.CosmosDB.CosmosDBTriggerAttributeBindingProvider`1.TryCreateAsync[T](TriggerBindingProviderContext context) at C:\azure-webjobs-sdk-extensions\src\WebJobs.Extensions.CosmosDB\Trigger\CosmosDBTriggerAttributeBindingProvider.cs : 81End of inner exception
   at async Microsoft.Azure.WebJobs.Extensions.CosmosDB.CosmosDBTriggerAttributeBindingProvider`1.TryCreateAsync[T](TriggerBindingProviderContext context) at C:\azure-webjobs-sdk-extensions\src\WebJobs.Extensions.CosmosDB\Trigger\CosmosDBTriggerAttributeBindingProvider.cs : 107
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at async Microsoft.Azure.WebJobs.Host.Triggers.CompositeTriggerBindingProvider.TryCreateAsync(TriggerBindingProviderContext context) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Triggers\CompositeTriggerBindingProvider.cs : 22
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at async Microsoft.Azure.WebJobs.Host.Indexers.FunctionIndexer.IndexMethodAsyncCore(MethodInfo method,IFunctionIndexCollector) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Indexers\FunctionIndexer.cs : 172
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at async Microsoft.Azure.WebJobs.Host.Indexers.FunctionIndexer.IndexMethodAsync(MethodInfo method,IFunctionIndexCollector) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Indexers\FunctionIndexer.cs : 149End of inner exception
   at async Microsoft.Azure.WebJobs.Host.Indexers.FunctionIndexer.IndexMethodAsync(MethodInfo method,IFunctionIndexCollector) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Indexers\FunctionIndexer.cs : 157
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at async Microsoft.Azure.WebJobs.Host.Indexers.FunctionIndexer.IndexTypeAsync(Type type,IFunctionIndexCollector) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Indexers\FunctionIndexer.cs : 85

Microsoft.Azure.WebJobs 3.0.30 Microsoft.Azure.WebJobs.Extensions 4.0.1 Microsoft.Azure.WebJobs.Extensions.CosmosDB 4.0.0-preview2

Screenshot of App Setting

[tottes200]

Thank you sir!

[ealsur]

This is part of the preview3 release