Dotnetcore 2.2 application fails to start

Question

I started a new project using dotnet new mvc and the first thing I did was to to generate models to my database using dotnet ef dbcontext scaffold(...). I basically followed the instructions I got from -> https://www.mydatahack.com/creating-web-apis-using-asp-net-and-mysql-in-5-minutes/.

Everything builds but when application tries to run I get the following error:

System.InvalidOperationException: Configuration value 'False' is not supported.
   at Microsoft.Extensions.Logging.LoggerFilterConfigureOptions.TryGetSwitch(String value, LogLevel& level)
   at Microsoft.Extensions.Logging.LoggerFilterConfigureOptions.LoadRules(LoggerFilterOptions options, IConfigurationSection configurationSection, String logger)
   at Microsoft.Extensions.Logging.LoggerFilterConfigureOptions.LoadDefaultConfigValues(LoggerFilterOptions options)
   at Microsoft.Extensions.Logging.LoggerFilterConfigureOptions.Configure(LoggerFilterOptions options)
   at Microsoft.Extensions.Options.OptionsFactory`1.Create(String name)
   at Microsoft.Extensions.Options.OptionsMonitor`1.<>c__DisplayClass10_0.<Get>b__0()
   at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
   at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
   at System.Lazy`1.CreateValue()
   at Microsoft.Extensions.Options.OptionsCache`1.GetOrAdd(String name, Func`1 createOptions)
   at Microsoft.Extensions.Options.OptionsMonitor`1.Get(String name)
   at Microsoft.Extensions.Options.OptionsMonitor`1.get_CurrentValue()
   at Microsoft.Extensions.Logging.LoggerFactory..ctor(IEnumerable`1 providers, IOptionsMonitor`1 filterOption)
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitSingleton(SingletonCallSite singletonCallSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitSingleton(SingletonCallSite singletonCallSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
   at Microsoft.AspNetCore.Hosting.WebHostBuilder.Build()
   at Negotium.Program.Main(String[] args) in Program.cs:line 18

The dotnet core sdk version is 2.2.103 running on Fedora 29

Not sure if this will be any help at all but here is my .csproj

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp2.2</TargetFramework>
    <AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>
  </PropertyGroup>


  <ItemGroup>
    <PackageReference Include="log4net" Version="2.0.8" />
    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.2.1" />
    <PackageReference Include="Microsoft.AspNetCore.App" />
    <PackageReference Include="Microsoft.AspNetCore.Razor.Design" Version="2.2.0" PrivateAssets="All" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.2.1" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="2.2.1" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer.Design" Version="1.1.6" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.2.1">
      <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
      <PrivateAssets>all</PrivateAssets>
    </PackageReference>
    <DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.2.1" />
    <PackageReference Include="MySql.Data.EntityFrameworkCore" Version="8.0.15" />
    <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />
  </ItemGroup>

</Project>

And below is the startup.cs file

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using MySql.Data.EntityFrameworkCore.Extensions;
using Microsoft.EntityFrameworkCore;
using Negotium.Models;

namespace Negotium
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<CookiePolicyOptions>(options =>
            {
                // This lambda determines whether user consent for non-essential cookies is needed for a given request.
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });

            services.AddDbContext<NegotiumContext>(options =>
                options.UseMySQL(Configuration.GetConnectionString("NegotiumDatabase")));

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);

        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }

            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseCookiePolicy();


            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });
        }
    }
}

Below is the Program.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;

namespace Negotium
{
    public class Program
    {
        public static void Main(string[] args)
        {

            CreateWebHostBuilder(args).Build().Run();


        }
        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
                        WebHost.CreateDefaultBuilder(args).UseStartup<Startup>();
    }
}

@Louxid as the stack trace shows, there is some value `False` in your configuration, which is not allowed. Might be expecting `false`, lower case `f`. You can try pasting your config here or try it out yourself. — inthevortex, Feb 02 '19 at 16:26
Hi @inthevortex I have went through the appsettings.json, appsettings.Development.json, .csproj, launchsetting.json, Program.cs and startup.cs and I have not found ```False``` written in this way. — Louxid, Feb 02 '19 at 17:05
@Louxid i see, did you check out the things in Simonare's answer? — inthevortex, Feb 03 '19 at 12:54
@TaoZhou, I started a new project as mentioned above, created mysql database and then followed the instructions from https://www.mydatahack.com/creating-web-apis-using-asp-net-and-mysql-in-5-minutes/. — Louxid, Feb 04 '19 at 14:42
I never found a solution to the problem but I started a new project and followed the same procedure and I don't have any issues anymore. Thank you all for the efforts. — Louxid, Feb 05 '19 at 12:26

score 0 · Answer 1 · answered Feb 02 '19 at 23:39

Generally Default Configuration Providers are :

ChainedConfigurationProvider
JsonConfigurationProvider
JsonConfigurationProvider (Development)
Secret Manager
EnvironmentVariablesConfigurationProvider
CommandLineConfigurationProvider

Check each provider for erroneous False vaue.

Reference

score 0 · Answer 2 · answered Aug 28 '20 at 15:05

I see that the OP never found an actual solution to his problem and I had this same issue just recently. My solution answered here to another question is quite simple and may help others stumbling upon this post.

If my solution doesn't work for you, the question I posted it to has tons of other solutions. Although the question is different, I believe it stems from the same issue.

Dotnetcore 2.2 application fails to start

2 Answers2