Ciao a tutti,
ultimamente mi sono accorto che di tanto in tanto l'applicazione web che si trova in produzione (on-line) si ritrova off-line e sono costretto a farla ripartire manualmente.
Per provare ad indagare sono andato nel file web.config e ho abilitato la seguente voce:
- stdoutLogEnabled="true"
Proprio oggi mi sono accorto (in modo del tutto casuale) che l'applicazione era giù e aprendo il file di log questo era il suo contenuto:
crit: Microsoft.AspNetCore.Hosting.Diagnostics[6]
Application startup exception
MySql.Data.MySqlClient.MySqlException (0x80004005): User 'nome_database' has exceeded the 'max_user_connections' resource (current value: 10)
at MySqlConnector.Core.ServerSession.SwitchAuthenticationAsync(ConnectionSettings cs, PayloadData payload, IOBehavior ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ServerSession.cs:line 535
at MySqlConnector.Core.ServerSession.TryResetConnectionAsync(ConnectionSettings cs, IOBehavior ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ServerSession.cs:line 498
at MySqlConnector.Core.ConnectionPool.GetSessionAsync(MySqlConnection connection, IOBehavior ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ConnectionPool.cs:line 72
at MySqlConnector.Core.ConnectionPool.GetSessionAsync(MySqlConnection connection, IOBehavior ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ConnectionPool.cs:line 141
at MySql.Data.MySqlClient.MySqlConnection.CreateSessionAsync(ConnectionPool pool, Nullable`1 ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:line 645
at MySql.Data.MySqlClient.MySqlConnection.OpenAsync(Nullable`1 ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:line 312
at MySql.Data.MySqlClient.MySqlConnection.Open() in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:line 280
at Hangfire.MySql.MySqlStorage.CreateAndOpenConnection()
at Hangfire.MySql.MySqlStorage.UseTransaction[T](Func`2 func, Nullable`1 isolationLevel)
at Hangfire.MySql.MySqlStorage.UseTransaction(Action`1 action)
at Hangfire.MySql.MySqlWriteOnlyTransaction.Commit()
at Hangfire.RecurringJobManager.AddOrUpdate(String recurringJobId, Job job, String cronExpression, RecurringJobOptions options)
at Hangfire.RecurringJobManagerExtensions.AddOrUpdate(IRecurringJobManager manager, String recurringJobId, Job job, String cronExpression, TimeZoneInfo timeZone, String queue)
at Hangfire.RecurringJob.AddOrUpdate[T](String recurringJobId, Expression`1 methodCall, String cronExpression, TimeZoneInfo timeZone, String queue)
at FFM3._1.Utility.HangfireJobScheduler.ScheduleRecurringJobs(IWebHostEnvironment env) in C:\Users\Xxxx\Xxxx\XXX\XXX\XXX\Utility\HangfireJobScheduler.cs:line 23
at FFM3._1.Startup.Configure(IApplicationBuilder app, IWebHostEnvironment env, IServiceProvider serviceProvider) in C:\Users\Xxxx\Xxxx\XXX\XXX\XXX\Startup.cs:line 170
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.ConfigureBuilder.Invoke(Object instance, IApplicationBuilder builder)
at Microsoft.AspNetCore.Hosting.ConfigureBuilder.<>c__DisplayClass4_0.<Build>b__0(IApplicationBuilder builder)
at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.<>c__DisplayClass13_0.<UseStartup>b__2(IApplicationBuilder app)
at Microsoft.AspNetCore.Mvc.Filters.MiddlewareFilterBuilderStartupFilter.<>c__DisplayClass0_0.<Configure>g__MiddlewareFilterBuilder|0(IApplicationBuilder builder)
at Microsoft.AspNetCore.Server.IIS.Core.IISServerSetupFilter.<>c__DisplayClass2_0.<Configure>b__0(IApplicationBuilder app)
at Microsoft.AspNetCore.HostFilteringStartupFilter.<>c__DisplayClass0_0.<Configure>b__0(IApplicationBuilder app)
at Microsoft.AspNetCore.Hosting.GenericWebHostService.StartAsync(CancellationToken cancellationToken)
Unhandled exception. MySql.Data.MySqlClient.MySqlException (0x80004005): User 'nome_database' has exceeded the 'max_user_connections' resource (current value: 10)
at MySqlConnector.Core.ServerSession.SwitchAuthenticationAsync(ConnectionSettings cs, PayloadData payload, IOBehavior ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ServerSession.cs:line 535
at MySqlConnector.Core.ServerSession.TryResetConnectionAsync(ConnectionSettings cs, IOBehavior ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ServerSession.cs:line 498
at MySqlConnector.Core.ConnectionPool.GetSessionAsync(MySqlConnection connection, IOBehavior ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ConnectionPool.cs:line 72
at MySqlConnector.Core.ConnectionPool.GetSessionAsync(MySqlConnection connection, IOBehavior ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ConnectionPool.cs:line 141
at MySql.Data.MySqlClient.MySqlConnection.CreateSessionAsync(ConnectionPool pool, Nullable`1 ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:line 645
at MySql.Data.MySqlClient.MySqlConnection.OpenAsync(Nullable`1 ioBehavior, CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:line 312
at MySql.Data.MySqlClient.MySqlConnection.Open() in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:line 280
at Hangfire.MySql.MySqlStorage.CreateAndOpenConnection()
at Hangfire.MySql.MySqlStorage.UseTransaction[T](Func`2 func, Nullable`1 isolationLevel)
at Hangfire.MySql.MySqlStorage.UseTransaction(Action`1 action)
at Hangfire.MySql.MySqlWriteOnlyTransaction.Commit()
at Hangfire.RecurringJobManager.AddOrUpdate(String recurringJobId, Job job, String cronExpression, RecurringJobOptions options)
at Hangfire.RecurringJobManagerExtensions.AddOrUpdate(IRecurringJobManager manager, String recurringJobId, Job job, String cronExpression, TimeZoneInfo timeZone, String queue)
at Hangfire.RecurringJob.AddOrUpdate[T](String recurringJobId, Expression`1 methodCall, String cronExpression, TimeZoneInfo timeZone, String queue)
at FFM3._1.Utility.HangfireJobScheduler.ScheduleRecurringJobs(IWebHostEnvironment env) in C:\Users\Xxxx\Xxxx\XXX\XXX\XXX\Utility\HangfireJobScheduler.cs:line 23
at FFM3._1.Startup.Configure(IApplicationBuilder app, IWebHostEnvironment env, IServiceProvider serviceProvider) in C:\Users\Xxxx\Xxxx\XXX\XXX\XXX\Startup.cs:line 170
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.ConfigureBuilder.Invoke(Object instance, IApplicationBuilder builder)
at Microsoft.AspNetCore.Hosting.ConfigureBuilder.<>c__DisplayClass4_0.<Build>b__0(IApplicationBuilder builder)
at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.<>c__DisplayClass13_0.<UseStartup>b__2(IApplicationBuilder app)
at Microsoft.AspNetCore.Mvc.Filters.MiddlewareFilterBuilderStartupFilter.<>c__DisplayClass0_0.<Configure>g__MiddlewareFilterBuilder|0(IApplicationBuilder builder)
at Microsoft.AspNetCore.Server.IIS.Core.IISServerSetupFilter.<>c__DisplayClass2_0.<Configure>b__0(IApplicationBuilder app)
at Microsoft.AspNetCore.HostFilteringStartupFilter.<>c__DisplayClass0_0.<Configure>b__0(IApplicationBuilder app)
at Microsoft.AspNetCore.Hosting.GenericWebHostService.StartAsync(CancellationToken cancellationToken)
at Microsoft.Extensions.Hosting.Internal.Host.StartAsync(CancellationToken cancellationToken)
at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token)
at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token)
at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.Run(IHost host)
at FFM3._1.Program.Main(String[] args) in C:\Users\Xxxx\Xxxx\XXX\XXX\XXX\Program.cs:line 16
Se non ho capito male credo che il problema sia nell'uso di hangfire (o forse nella sua errata configurazione).
Premetto che sto lavorando con Asp.Net Core 3.1 e sto utilizzando MySql come DB.
Di seguito riporto quanto ho inserito nel metodo ConfigureServices del file Startup.cs
services.AddHangfire(configuration => configuration.SetDataCompatibilityLevel(CompatibilityLevel.Version_170)
.UseSimpleAssemblyNameTypeSerializer()
.UseRecommendedSerializerSettings()
.UseStorage(new MySqlStorage(Configuration.GetConnectionString("DefaultConnection"), new MySqlStorageOptions()
{
TablesPrefix = "Hangfire"
})));
services.AddHangfireServer();
Di seguito riporto quanto ho inserito nel metodo Configure del file Startup.cs
app.UseHangfireDashboard("/hangfire", new DashboardOptions
{
Authorization = new[] { new HangfireAuthorizationFilter() }
});
HangfireJobScheduler.ScheduleRecurringJobs(env);
Dal log spero riusciate a darmi qualche indicazione per aiutarmi a risolvere questo problema.
Vi ringrazio anticipatamente.
Alessio.
