Pomelo.entityframeworkcore.mysql: पोमेलो 3.0.0-rc1.final के साथ .NET Core 2.2 से .NET Core 3.0 में अपग्रेड करने के बाद डेटाबेस CPU स्पाइक्स और अपंग डेटाबेस

प्रजनन करने कि प्रक्रिया

मैंने हाल ही में अपनी वेबसाइट को परिवर्तित किया है जो .NET Framework MVC से .NET Core 2.2 MVC में Identity Framework का उपयोग करती है। मैं पिछले हफ्ते पोमेलो 2.2.0 का उपयोग करके इसके साथ लाइव हुआ और इसने एक इलाज किया। एंटिटी फ्रेमवर्क या मेरे MySQL डेटाबेस के संबंध में कोई समस्या नहीं है।

कल मैंने इस धागे पर देखा कि पोमेलो के लिए 3.0.0-आरसी1.फाइनल जारी किया गया था, इसलिए मैंने सोचा कि यह बुद्धिमान होगा क्योंकि मैंने कम से कम नवीनतम संस्करण पर होने के लिए .NET कोर में अपग्रेड किया था।

मैंने इस माइग्रेशन गाइड का अनुसरण किया और मैंने पोमेलो के 3.0.0-rc1. final संस्करण का उपयोग करके अपनी साइट को .NET Core 3 में बदल दिया। मैंने स्थानीय रूप से और अपने परीक्षण वातावरण में साइट का परीक्षण किया और सभी अच्छे लग रहे थे।

दुर्भाग्य से जब मेरे उत्पादन वातावरण में लाइव होने की बात आई, जहां किसी भी समय साइट पर लगभग 100-150 लोग होते हैं, जैसे ही एक कंटेनर फैलता है, मेरा डेटाबेस 80-100% सीपीयू तक बढ़ जाता है। साथ ही लॉग डेटाबेस टाइमआउट त्रुटियों को तुरंत आउटपुट कर रहा था।

मैंने नए संस्करण का उपयोग करने में एक कंटेनर लाने के लिए दो मौकों पर कोशिश की। आप इन दो अवसरों को नीचे मेरे एडब्ल्यूएस आरडीएस MySQL डेटाबेस के मेट्रिक्स पर स्पष्ट रूप से देख सकते हैं:

समस्या

लॉग को स्पाइक के रूप में एक ही समय में कमांड टाइमआउट समाप्त होने वाली त्रुटियों से भरा जा रहा है और मेरे डेटाबेस को घुटनों पर लाने के लिए लोड बैलेंसर में आने के लिए केवल एक कंटेनर लेता है। दुख की बात है कि इस बिंदु पर मुझे यकीन नहीं है कि इसका निवारण करने के लिए क्या करना चाहिए। ऐसा लगता है कि सभी अपवाद प्राधिकरण/सत्र मिडलवेयर से उपजी हैं:

at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)

(नीचे पूर्ण स्टैक ट्रेस से स्निपेट)।

माइग्रेशन गाइड का कहना है कि अब प्राधिकरण मिडलवेयर की आवश्यकता है, इसलिए मुझे यह भी नहीं लगता कि मैं स्टार्टअप.सीएस में जोड़े गए नए कॉल को हटा सकता हूं।

यहाँ मेरा स्टार्टअप वर्ग है:

public class Startup 
    { 
        private IConfiguration Configuration { get; } 

        private static readonly ILoggerFactory EfLoggerFactory = LoggerFactory.Create(builder => 
        { 
            builder 
                .AddFilter((category, level) => 
                    category == DbLoggerCategory.Database.Command.Name 
                    && level == LogLevel.Information) 
                .AddConsole(); 
        }); 

        private readonly IWebHostEnvironment environment; 

        public Startup(IConfiguration configuration, IWebHostEnvironment environment) 
        { 
            this.environment = environment; 
            Configuration = configuration; 

            var builder = new ConfigurationBuilder() 
                .SetBasePath(environment.ContentRootPath) 
                .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true) 
                .AddJsonFile($"appsettings.{environment.EnvironmentName}.json", optional: true) 
                .AddEnvironmentVariables(); 

            Configuration = builder.Build(); 
        } 

        // This method gets called by the runtime. Use this method to add services to the container. 
        public void ConfigureServices(IServiceCollection services) 
        { 
            var redis = ConnectionMultiplexer.Connect(Configuration.GetConnectionString("RedisConnection")); 
            services.AddDataProtection() 
                .PersistKeysToStackExchangeRedis(redis, "DataProtectionKeys"); 

            services.Configure<CookiePolicyOptions>(options => 
            { 
                // This lambda determines whether user consent for non-essential cookies is needed for a given request. 
                options.CheckConsentNeeded = context => false; 
                options.MinimumSameSitePolicy = SameSiteMode.None; 
            });

            services.AddDbContextPool<MyDbContext>( 
                options => options.UseLazyLoadingProxies() 
                    .UseLoggerFactory(EfLoggerFactory) 
                    .UseMySql(Configuration.GetConnectionString(ConnectionStringConstants.DefaultConnectionName), 
                        mySqlOptions => { mySqlOptions.ServerVersion(new Version(5, 7, 24), ServerType.MySql); } 
                    )); 

            services.AddIdentity<User, Role>(options => 
                { 
                    // TODO: Probably should improve the password complexity - requires changes to the registration logic to handle errors when creating user  
                    options.Password.RequireDigit = false; 
                    options.Password.RequiredLength = 6; 
                    options.Password.RequireNonAlphanumeric = false; 
                    options.Password.RequireUppercase = false; 
                    options.Password.RequireLowercase = false; 
                }) 
                .AddEntityFrameworkStores<MyDbContext>(); 

            services.AddAuthentication() 
                .AddFacebook(o => 
                { 
                    o.AppId = Configuration.GetValue<string>("Facebook:FacebookAppId"); 
                    o.AppSecret = Configuration.GetValue<string>("Facebook:FacebookAppSecret"); 
                }); 

            services.AddAuthorization(options => 
            { 
                options.FallbackPolicy = new AuthorizationPolicyBuilder() 
                    .RequireAuthenticatedUser() 
                    .Build(); 
            }); 

            services.ConfigureApplicationCookie(options => 
            { 
                options.LoginPath = "/Welcome"; 
                options.AccessDeniedPath = "/Welcome"; 
            }); 

            services.AddStackExchangeRedisCache(options => 
            { 
                options.Configuration = Configuration.GetConnectionString("RedisConnection"); 
                options.InstanceName = Configuration.GetValue<string>("ApplicationRedisKey"); 
            }); 

            services.AddSession(); 
            services.AddResponseCaching(); 

            RegisterServices(services); 

            services.AddJsEngineSwitcher(options => options.DefaultEngineName = ChakraCoreJsEngine.EngineName) 
                .AddChakraCore(); 

            services.AddReact(); 

            services.AddMvc() 
            .AddJsonOptions(options => 
            { 
                options.JsonSerializerOptions.PropertyNamingPolicy = null; // Enables PascalCase JSON serialization (default for .NET core is camelCase) 
            }) 
            .SetCompatibilityVersion(CompatibilityVersion.Version_3_0); 

            services.AddSignalR().AddStackExchangeRedis(Configuration.GetConnectionString("RedisConnection"), options => 
            { 
                options.Configuration.ChannelPrefix = Configuration.GetValue<string>("SignalRRedisKey"); 
            }); 

            SetStaticConfigValues(); 

            var builder = services.AddControllersWithViews(); 

            if (environment.IsDevelopment()) 
            { 
                builder.AddRazorRuntimeCompilation(); 
            } 

            // AWS Config 
            services.AddDefaultAWSOptions(Configuration.GetAWSOptions()); 
            services.AddAWSService<IAmazonLambda>(); 
            services.AddAWSService<IAmazonS3>(); 
            services.AddAWSService<IAmazonSimpleEmailService>(); 
        } 

        public void ConfigureContainer(ContainerBuilder builder) 
        { 
            var listOfModules = new List<string> 
            { 
                "Blah.Bl.Core.Bootstrapper.BlBootstrapper, Blah.Bl.Core", 
                "Blah.Dal.Core.Bootstrapper.DalBootstrapper, Blah.Dal.Core", 
                "Blah.Domain.Core.Bootstrapper.DomainBootstrapper, Blah.Domain.Core", 
                "Blah.WebUI.Core.Bootstrapper.WebBootstrapper, Blah.WebUI.Core" 
            }; 

            var serviceBootstrappers = new List<Module>(); 

            foreach (var moduleToLoad in listOfModules) 
            { 
                var boostrapperType = Type.GetType(moduleToLoad); 

                var serviceBootstrapper = (Module)Activator.CreateInstance(boostrapperType); 
                serviceBootstrappers.Add(serviceBootstrapper); 
            } 

            serviceBootstrappers.ForEach(module => builder.RegisterModule(module)); 
        } 

        private void SetStaticConfigValues() 
        { 
            ImageHelper.ImageLocation = Configuration.GetValue<string>("ImageLocation"); 
            ImageHelper.ImageBucketName = Configuration.GetValue<string>("ImageBucketName"); 
        } 

        private void RegisterServices(IServiceCollection services) 
        { 
            services.AddOptions(); 

            services.AddScoped<IPasswordHasher<User>, BlowfishPasswordHasher>(); 
            services.AddTransient<IViewRenderService, ViewRenderService>(); 
            services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>(); 
            services.AddSingleton<IActionContextAccessor, ActionContextAccessor>(); 
            services.AddScoped<IIdentityWrapper, IdentityWrapper>(); 
            services.Configure<PaypalConfigSettings>(options => Configuration.GetSection("Paypal").Bind(options)); 
            services.Configure<FacebookConfigSettings>(options => Configuration.GetSection("Facebook").Bind(options)); 
        } 

        private ILoggerFactory GetLoggerFactory() 
        { 
            IServiceCollection serviceCollection = new ServiceCollection(); 
            serviceCollection.AddLogging(builder => 
                builder.AddConsole() 
                    .AddFilter(DbLoggerCategory.Database.Command.Name, LogLevel.Information));  
            return serviceCollection.BuildServiceProvider() 
                .GetService<ILoggerFactory>(); 
        } 

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline. 
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env) 
        { 
            if (env.IsDevelopment()) 
            { 
                app.UseDeveloperExceptionPage(); 
                app.UseDatabaseErrorPage(); 
            } 
            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. 
                // TODO: Do I want HSTS yet...? probably, uncomment when ready 
                // app.UseHsts(); 
            } 

            app.UseHttpsRedirection(); 
            app.UseResponseCaching(); 

            app.UseWhen(x =>  
                x.Request.HttpContext.Request.Path.ToString().StartsWith("/content/images/"), 
                appBranch => 
                { 
                    appBranch.UseImageHandler(); 
                }); 

            app.UseCookiePolicy(); 
            app.UseSession(); 

            app.UseRewriter(new RewriteOptions() 
                .AddRewrite("^embed.js", "dist/embed/embed.js", true)); 

            app.UseStaticFiles(); 
            app.UseRouting(); 
            app.UseAuthentication(); 
            app.UseAuthorization(); 

            app.UseEndpoints(endpoints => 
            { 
                //.. other routes including signalr setup

                // Default route 
                endpoints.MapControllerRoute( 
                    name: "Default", 
                    pattern: "{controller=Root}/{action=Index}/{urlId:regex((?i)^[a-z0-9]{{6}}$)?}/{takerId?}"); 
            }); 

            // Initialise ReactJS.NET. Must be before static files. 
            app.UseReact(config => 
            { 
                // If you want to use server-side rendering of React components, 
                // add all the necessary JavaScript files here. This includes 
                // your components as well as all of their dependencies. 
                // See http://reactjs.net/ for more information. Example: 
                //config 
                //    .AddScript("~/Scripts/First.jsx") 
                //    .AddScript("~/Scripts/Second.jsx"); 

                // If you use an external build too (for example, Babel, Webpack, 
                // Browserify or Gulp), you can improve performance by disabling 
                // ReactJS.NET's version of Babel and loading the pre-transpiled 
                // scripts. Example: 
                //config 
                //    .SetLoadBabel(false) 
                //    .AddScriptWithoutTransform("~/Scripts/bundle.server.js"); 

                config.JsonSerializerSettings.ContractResolver = new DefaultContractResolver(); // Enables PascalCase JSON serialization (default for .NET core is camelCase) 

                config 
                    .SetReuseJavaScriptEngines(true) 
                    .SetLoadBabel(true) 
                    .SetLoadReact(false) 
                    .AddScriptWithoutTransform("./dist/reactjs/runtime.js") 
                    .AddScriptWithoutTransform("./dist/reactjs/vendors.js") 
                    .AddScriptWithoutTransform("./dist/reactjs/components.js"); 
            }); 
        } 
    } 

मुझे सच में यकीन नहीं है कि मैं अपनी साइट से गुजरने वाले सभी ट्रैफ़िक के बिना इसका निवारण कैसे कर सकता हूँ। मैं किसी भी मदद की सराहना करता हूं जो मुझे मिल सकती है।

यदि आप एक अपवाद देख रहे हैं, तो पूर्ण अपवाद विवरण (संदेश और स्टैक ट्रेस) शामिल करें।

Exception message:
Stack trace:

[2019-10-13 20:31:13.7365] 1 - ERROR - Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware - An unhandled exception has occurred while executing the request.
MySql.Data.MySqlClient.MySqlException (0x80004005): The Command Timeout expired before the operation completed.
---> MySql.Data.MySqlClient.MySqlException (0x80004005): The Command Timeout expired before the operation completed.
---> System.IO.IOException: Unable to read data from the transport connection: Connection timed out.
---> System.Net.Sockets.SocketException (110): Connection timed out
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
--- End of inner exception stack trace ---
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.Security.SslStream.FillBufferAsync[TReadAdapter](TReadAdapter adapter, Int32 minSize)
at System.Net.Security.SslStream.ReadAsyncInternal[TReadAdapter](TReadAdapter adapter, Memory`1 buffer)
at System.Net.Security.SslStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at MySqlConnector.Protocol.Serialization.StreamByteHandler.<ReadBytesAsync>g__DoReadBytesSync|6_0(ArraySegment`1 buffer_) in C:\projects\mysqlconnector\src\MySqlConnector\Protocol\Serialization\StreamByteHandler.cs:line 39
at MySqlConnector.Protocol.Serialization.BufferedByteReader.ReadBytesAsync(IByteHandler byteHandler, ArraySegment`1 buffer, Int32 totalBytesToRead, IOBehavior ioBehavior) in C:\projects\mysqlconnector\src\MySqlConnector\Protocol\Serialization\BufferedByteReader.cs:line 37
at MySqlConnector.Protocol.Serialization.ProtocolUtility.ReadPacketAsync(BufferedByteReader bufferedByteReader, IByteHandler byteHandler, Func`1 getNextSequenceNumber, ProtocolErrorBehavior protocolErrorBehavior, IOBehavior ioBehavior) in C:\projects\mysqlconnector\src\MySqlConnector\Protocol\Serialization\ProtocolUtility.cs:line 410
at MySqlConnector.Protocol.Serialization.ProtocolUtility.DoReadPayloadAsync(BufferedByteReader bufferedByteReader, IByteHandler byteHandler, Func`1 getNextSequenceNumber, ArraySegmentHolder`1 previousPayloads, ProtocolErrorBehavior protocolErrorBehavior, IOBehavior ioBehavior) in C:\projects\mysqlconnector\src\MySqlConnector\Protocol\Serialization\ProtocolUtility.cs:line 468
at MySqlConnector.Protocol.Serialization.ProtocolUtility.ReadPayloadAsync(BufferedByteReader bufferedByteReader, IByteHandler byteHandler, Func`1 getNextSequenceNumber, ArraySegmentHolder`1 cache, ProtocolErrorBehavior protocolErrorBehavior, IOBehavior ioBehavior) in C:\projects\mysqlconnector\src\MySqlConnector\Protocol\Serialization\ProtocolUtility.cs:line 463
at MySqlConnector.Protocol.Serialization.StandardPayloadHandler.ReadPayloadAsync(ArraySegmentHolder`1 cache, ProtocolErrorBehavior protocolErrorBehavior, IOBehavior ioBehavior) in C:\projects\mysqlconnector\src\MySqlConnector\Protocol\Serialization\StandardPayloadHandler.cs:line 42
at MySqlConnector.Core.ServerSession.ReceiveReplyAsync(IOBehavior ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ServerSession.cs:line 732
--- End of stack trace from previous location where exception was thrown ---
at MySqlConnector.Core.ServerSession.ReceiveReplyAsyncAwaited(ValueTask`1 task) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ServerSession.cs:line 773
at MySqlConnector.Core.ResultSet.ReadResultSetHeaderAsync(IOBehavior ioBehavior) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ResultSet.cs:line 49
at MySql.Data.MySqlClient.MySqlDataReader.ActivateResultSet() in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlDataReader.cs:line 111
at MySql.Data.MySqlClient.MySqlDataReader.CreateAsync(CommandListPosition commandListPosition, ICommandPayloadCreator payloadCreator, IDictionary`2 cachedProcedures, IMySqlCommand command, CommandBehavior behavior, IOBehavior ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlDataReader.cs:line 338
at MySqlConnector.Core.CommandExecutor.ExecuteReaderAsync(IReadOnlyList`1 commands, ICommandPayloadCreator payloadCreator, CommandBehavior behavior, IOBehavior ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\Core\CommandExecutor.cs:line 63
at MySql.Data.MySqlClient.MySqlCommand.ExecuteDbDataReader(CommandBehavior behavior) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlCommand.cs:line 218
at System.Data.Common.DbCommand.ExecuteReader()
at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReader(RelationalCommandParameterObject parameterObject)
at Microsoft.EntityFrameworkCore.Query.RelationalShapedQueryCompilingExpressionVisitor.QueryingEnumerable`1.Enumerator.MoveNext()
at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.Execute[TResult](Expression expression)
at System.Linq.Queryable.First[TSource](IQueryable`1 source, Expression`1 predicate)
at Blah.Bl.Core.Services.QuizStartOgTagsService.GetOgTagsForQuizStart(String urlId, Nullable`1 personalityId) in /Blah.Bl.Core/Services/QuizStartOgTagsService.cs:line 35
at Blah.WebUI.Core.Components.DisplayOgTagsViewComponent.InvokeAsync(String urlId, Nullable`1 personalityId) in /Blah.WebUI.Core/Components/DisplayOgTagsViewComponents.cs:line 22
at Microsoft.AspNetCore.Mvc.ViewComponents.DefaultViewComponentInvoker.InvokeAsyncCore(ObjectMethodExecutor executor, ViewComponentContext context)
at Microsoft.AspNetCore.Mvc.ViewComponents.DefaultViewComponentInvoker.InvokeAsync(ViewComponentContext context)
at Microsoft.AspNetCore.Mvc.ViewComponents.DefaultViewComponentHelper.InvokeCoreAsync(ViewComponentDescriptor descriptor, Object arguments)
at AspNetCore.Views_Quiz_Start.<>c__DisplayClass14_0.<<ExecuteAsync>b__3>d.MoveNext() in /Blah.WebUI.Core/Views/Quiz/Start.cshtml:line 161
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.AspNetCore.Mvc.Razor.RazorPage.RenderSectionAsyncCore(String sectionName, Boolean required)
at Microsoft.AspNetCore.Mvc.Razor.RazorPage.RenderSection(String name, Boolean required)
at AspNetCore.Views_Shared__QuizLayout.<ExecuteAsync>b__8_0() in /Blah.WebUI.Core/Views/Shared/_QuizLayout.cshtml:line 6
at Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperExecutionContext.SetOutputContentAsync()
at AspNetCore.Views_Shared__QuizLayout.ExecuteAsync()
at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)
at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, Boolean invokeViewStarts)
at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderLayoutAsync(ViewContext context, ViewBufferTextWriter bodyWriter)
at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)
at Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ViewContext viewContext, String contentType, Nullable`1 statusCode)
at Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ActionContext actionContext, IView view, ViewDataDictionary viewData, ITempDataDictionary tempData, String contentType, Nullable`1 statusCode)
at Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor.ExecuteAsync(ActionContext context, ViewResult result)
at Microsoft.AspNetCore.Mvc.ViewResult.ExecuteResultAsync(ActionContext context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResultFilterAsync>g__Awaited|29_0[TFilter,TFilterAsync](ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeResultFilters>g__Awaited|27_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|19_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.ResponseCaching.ResponseCachingMiddleware.Invoke(HttpContext httpContext)
at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.<Invoke>g__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, Task task)

आगे की तकनीकी जानकारी

MySQL संस्करण: 5.6.41
ऑपरेटिंग सिस्टम: Amazon ECS, Docker, .NET Core 3.0 रनटाइम बायोनिक इमेज
Pomelo.EntityFrameworkCore.MySql संस्करण: 3.0.0-rc1. final
Microsoft.AspNetCore.App संस्करण: 3.0.0

मेरे प्रोजेक्ट सेटअप के बारे में अन्य विवरण: