Azure 应用服务 500 错误：值不能是 null。 （参数'containerId'）

Question

I have an app service which has been running ok, I added blob storage & got that working locally.

When I published the app it is no longer running. It's been difficult to track down logs but I found this in 'Availability & Performance' in Azure Portal.

I thought maybe there was something wrong with the config but the appsettings file seems to have published ok. Been stuck with this issue for a while as I'm quite new to Azure

Description: The process was terminated due to an unhandled exception. Exception Info: System.ArgumentNullException: Value cannot be null. (Parameter 'containerId') at Microsoft.Azure.Cosmos.CosmosClient.GetContainer(String databaseId, String containerId) at xxx .Services.MemberService..ctor(CosmosClient dbClient, String databaseName, String containerName) in C: xxx \source\repos* xxx *\Services\MemberService.cs:line 16 at xxx .Startup.InitializeCosmosMemberClientInstanceAsync(IConfigurationSection configurationSection) in C: xxx \source\repos* xxx *\Startup.cs:line 99 at xxx .Startup.ConfigureServices(IServiceCollection services) in C: xxx \source\repos* xxx *\Startup.cs:line 54 at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[ ] parameters, CultureInfo culture) at Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.InvokeCore(Object instance, IServiceCollection services) at Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.<>c__DisplayClass9_0.g__Startup|0(IServiceCollection serviceCollection) at Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.Invoke(Object instance, IServiceCollection services) at Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.<>c__DisplayClass8_0.b__0(IServiceCollection services) at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.UseStartup(Type startupType, HostBuilderContext context, IServiceCollection services, Object instance) at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.<>c__DisplayClass13_0.b__0(HostBuilderContext context, IServiceCollection services) at Microsoft.Extensions.Hosting.HostBuilder.CreateServiceProvider() at Microsoft.Extensions.Hosting.HostBuilder.Build() at xxx .Program.Main(String[] args) in Z0D61F8370CAD1D412 F80B84D143E1257Z: xxx \source\repos* xxx *\Program.cs:line 16

The Service is initialized in startup like so

        private static async Task<FilesService> InitializeCosmosFilesClientInstanceAsync(IConfigurationSection configurationSection)
    {
        string databaseName = configurationSection.GetSection("DatabaseName").Value;
        string memberFilesContainer = configurationSection.GetSection("MemberFilesContainer").Value;

        string account = configurationSection.GetSection("Account").Value;
        string key = configurationSection.GetSection("Key").Value;

        Microsoft.Azure.Cosmos.CosmosClient client = new Microsoft.Azure.Cosmos.CosmosClient(account, key);
        FilesService filesService = new FilesService(client, databaseName, memberFilesContainer);
        Microsoft.Azure.Cosmos.DatabaseResponse database = await client.CreateDatabaseIfNotExistsAsync(databaseName);
        await database.Database.CreateContainerIfNotExistsAsync(memberFilesContainer, "/id");

        return filesService;
    }

And called in the ConfigureServices method like so

                services.AddSingleton<IFilesService>(InitializeCosmosFilesClientInstanceAsync(Configuration.GetSection("CosmosDbProd")).GetAwaiter().GetResult());

The appsetting.json file has the following set

"CosmosDbProd": {
"Account": "xxx",
"Key": "xxx",
"DatabaseName": "xxx-db-prod",
"ContainerName": "Member",
"MemberFilesContainer": "MemberFiles"

},

Answer 1

I found the bug. In appsettings.json I had a section named 'ContainerName' which should have been 'MemberContainer'. I think writing out in here helped me get to the answer