An error occurred while starting the application.

MySqlException: Unable to connect to any of the specified MySQL hosts.

• MySqlConnector.Core.ServerSession.ConnectAsync(ConnectionSettings cs, int startTickCount, ILoadBalancer loadBalancer, IOBehavior ioBehavior, CancellationToken cancellationToken) in ServerSession.cs

• MySqlConnector.Core.ConnectionPool.ConnectSessionAsync(string logMessage, int startTickCount, IOBehavior ioBehavior, CancellationToken cancellationToken) in ConnectionPool.cs

• System.Threading.Tasks.ValueTask.get_Result()

• System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable+ConfiguredValueTaskAwaiter.GetResult()

• MySqlConnector.Core.ConnectionPool.GetSessionAsync(MySqlConnection connection, int startTickCount, IOBehavior ioBehavior, CancellationToken cancellationToken) in ConnectionPool.cs

• MySqlConnector.Core.ConnectionPool.GetSessionAsync(MySqlConnection connection, int startTickCount, IOBehavior ioBehavior, CancellationToken cancellationToken) in ConnectionPool.cs

• System.Threading.Tasks.ValueTask.get_Result()

• System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable+ConfiguredValueTaskAwaiter.GetResult()

• MySqlConnector.MySqlConnection.CreateSessionAsync(ConnectionPool pool, int startTickCount, Nullable ioBehavior, CancellationToken cancellationToken) in MySqlConnection.cs

• System.Threading.Tasks.ValueTask.get_Result()

• System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable+ConfiguredValueTaskAwaiter.GetResult()

• MySqlConnector.MySqlConnection.OpenAsync(Nullable ioBehavior, CancellationToken cancellationToken) in MySqlConnection.cs

• MySqlConnector.MySqlConnection.Open() in MySqlConnection.cs

• Hangfire.MySql.MySqlStorage.CreateAndOpenConnection()

• Hangfire.MySql.MySqlStorage..ctor(string connectionString, MySqlStorageOptions storageOptions)

• Mt.Site.Web.Startup.Startup.b__5_3(IGlobalConfiguration config) in Startup.cs

• Hangfire.HangfireServiceCollectionExtensions+<>c__DisplayClass0_0.b__0(IServiceProvider provider, IGlobalConfiguration config)

• Hangfire.HangfireServiceCollectionExtensions+<>c__DisplayClass1_0.b__10(IServiceProvider serviceProvider)

• Castle.Windsor.MsDependencyInjection.WindsorRegistrationHelper+<>c__DisplayClass5_0.b__0(IKernel c)

• Castle.MicroKernel.Registration.ComponentRegistration+<>c__DisplayClass84_0.b__0(IKernel k, ComponentModel m, CreationContext c)

• Castle.MicroKernel.ComponentActivator.FactoryMethodActivator.Instantiate(CreationContext context)

• Castle.MicroKernel.ComponentActivator.DefaultComponentActivator.InternalCreate(CreationContext context)

• Castle.MicroKernel.ComponentActivator.AbstractComponentActivator.Create(CreationContext context, Burden burden)

• Castle.MicroKernel.Lifestyle.AbstractLifestyleManager.CreateInstance(CreationContext context, bool trackedExternally)

• Castle.MicroKernel.Lifestyle.SingletonLifestyleManager.Resolve(CreationContext context, IReleasePolicy releasePolicy)

• Castle.MicroKernel.Handlers.DefaultHandler.ResolveCore(CreationContext context, bool requiresDecommission, bool instanceRequired, out Burden burden)

• Castle.MicroKernel.Handlers.DefaultHandler.Resolve(CreationContext context, bool instanceRequired)

• Castle.MicroKernel.DefaultKernel.ResolveComponent(IHandler handler, Type service, Arguments additionalArguments, IReleasePolicy policy, bool ignoreParentContext)

• Castle.MicroKernel.DefaultKernel.Castle.MicroKernel.IKernelInternal.Resolve(Type service, Arguments arguments, IReleasePolicy policy, bool ignoreParentContext)

• Castle.MicroKernel.DefaultKernel.Resolve(Type service, Arguments arguments)

• Castle.Windsor.MsDependencyInjection.ScopedWindsorServiceProvider.ResolveInstanceOrNull(Type serviceType, bool isOptional)

• Castle.Windsor.MsDependencyInjection.ScopedWindsorServiceProvider.GetServiceInternal(Type serviceType, bool isOptional)

• Castle.Windsor.MsDependencyInjection.ScopedWindsorServiceProvider.GetService(Type serviceType)

• Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService(IServiceProvider provider)

• Hangfire.HangfireServiceCollectionExtensions.ThrowIfNotConfigured(IServiceProvider serviceProvider)

• Hangfire.HangfireApplicationBuilderExtensions.UseHangfireDashboard(IApplicationBuilder app, string pathMatch, DashboardOptions options, JobStorage storage)

• Mt.Site.Web.Startup.Startup.Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory) in Startup.cs

• System.RuntimeMethodHandle.InvokeMethod(object target, object[] arguments, Signature sig, bool constructor, bool wrapExceptions)

• System.Reflection.RuntimeMethodInfo.Invoke(object obj, BindingFlags invokeAttr, Binder binder, object[] parameters, CultureInfo culture)

• Microsoft.AspNetCore.Hosting.ConfigureBuilder.Invoke(object instance, IApplicationBuilder builder)

• Microsoft.AspNetCore.Hosting.ConfigureBuilder+<>c__DisplayClass4_0.b__0(IApplicationBuilder builder)

• Microsoft.AspNetCore.Hosting.ConventionBasedStartup.Configure(IApplicationBuilder app)

• Microsoft.AspNetCore.Mvc.Filters.MiddlewareFilterBuilderStartupFilter+<>c__DisplayClass0_0.g__MiddlewareFilterBuilder|0(IApplicationBuilder builder)

• Microsoft.AspNetCore.Server.IIS.Core.IISServerSetupFilter+<>c__DisplayClass2_0.b__0(IApplicationBuilder app)

• Microsoft.AspNetCore.Hosting.WebHost.BuildApplication()

• Microsoft.AspNetCore.Hosting.WebHost.StartAsync(CancellationToken cancellationToken)

• Microsoft.AspNetCore.Hosting.WebHostExtensions.RunAsync(IWebHost host, CancellationToken token, string startupMessage)

• Microsoft.AspNetCore.Hosting.WebHostExtensions.RunAsync(IWebHost host, CancellationToken token, string startupMessage)

• Microsoft.AspNetCore.Hosting.WebHostExtensions.RunAsync(IWebHost host, CancellationToken token)

• Microsoft.AspNetCore.Hosting.WebHostExtensions.Run(IWebHost host)

• Mt.Site.Web.Startup.Program.Main(string[] args) in Program.cs