diff --git a/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/AbpBackgroundWorkersQuartzModule.cs b/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/AbpBackgroundWorkersQuartzModule.cs
index 9cfc748c4e..a47f8dac77 100644
--- a/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/AbpBackgroundWorkersQuartzModule.cs
+++ b/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/AbpBackgroundWorkersQuartzModule.cs
@@ -26,20 +26,20 @@ namespace Volo.Abp.BackgroundWorkers.Quartz
 
         public override void OnPreApplicationInitialization(ApplicationInitializationContext context)
         {
-            var options = context.ServiceProvider.GetService<IOptions<AbpBackgroundWorkerOptions>>().Value;
+            var options = context.ServiceProvider.GetRequiredService<IOptions<AbpBackgroundWorkerOptions>>().Value;
             if (!options.IsEnabled)
             {
-                var quartzOptions = context.ServiceProvider.GetService<IOptions<AbpQuartzOptions>>().Value;
-                quartzOptions.StartSchedulerFactory  = scheduler => Task.CompletedTask;
+                var quartzOptions = context.ServiceProvider.GetRequiredService<IOptions<AbpQuartzOptions>>().Value;
+                quartzOptions.StartSchedulerFactory  = _ => Task.CompletedTask;
             }
         }
 
         public override void OnApplicationInitialization(ApplicationInitializationContext context)
         {
-            var quartzBackgroundWorkerOptions = context.ServiceProvider.GetService<IOptions<AbpBackgroundWorkerQuartzOptions>>().Value;
+            var quartzBackgroundWorkerOptions = context.ServiceProvider.GetRequiredService<IOptions<AbpBackgroundWorkerQuartzOptions>>().Value;
             if (quartzBackgroundWorkerOptions.IsAutoRegisterEnabled)
             {
-                var backgroundWorkerManager = context.ServiceProvider.GetService<IBackgroundWorkerManager>();
+                var backgroundWorkerManager = context.ServiceProvider.GetRequiredService<IBackgroundWorkerManager>();
                 var works = context.ServiceProvider.GetServices<IQuartzBackgroundWorker>().Where(x=>x.AutoRegister);
 
                 foreach (var work in works)
diff --git a/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/QuartzBackgroundWorkerAdapter.cs b/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/QuartzBackgroundWorkerAdapter.cs
index 970beea3f0..0b75f389fe 100644
--- a/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/QuartzBackgroundWorkerAdapter.cs
+++ b/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/QuartzBackgroundWorkerAdapter.cs
@@ -57,7 +57,7 @@ namespace Volo.Abp.BackgroundWorkers.Quartz
                 .Build();
         }
 
-        public async override Task Execute(IJobExecutionContext context)
+        public override async Task Execute(IJobExecutionContext context)
         {
             var worker = (IBackgroundWorker) ServiceProvider.GetService(typeof(TWorker));
             var workerContext = new PeriodicBackgroundWorkerContext(ServiceProvider);
diff --git a/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/QuartzBackgroundWorkerManager.cs b/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/QuartzBackgroundWorkerManager.cs
index d670c1db98..582a7dd520 100644
--- a/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/QuartzBackgroundWorkerManager.cs
+++ b/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/QuartzBackgroundWorkerManager.cs
@@ -19,14 +19,17 @@ namespace Volo.Abp.BackgroundWorkers.Quartz
 
         public virtual async Task StartAsync(CancellationToken cancellationToken = default)
         {
-            await _scheduler.ResumeAll(cancellationToken);
+            if (_scheduler.IsStarted && _scheduler.InStandbyMode)
+            {
+                await _scheduler.Start(cancellationToken);
+            }
         }
 
         public virtual async Task StopAsync(CancellationToken cancellationToken = default)
         {
-            if (!_scheduler.IsShutdown)
+            if (_scheduler.IsStarted && !_scheduler.InStandbyMode)
             {
-                await _scheduler.PauseAll(cancellationToken);
+                await _scheduler.Standby(cancellationToken);
             }
         }
 
diff --git a/framework/src/Volo.Abp.Quartz/Volo/Abp/Quartz/AbpQuartzModule.cs b/framework/src/Volo.Abp.Quartz/Volo/Abp/Quartz/AbpQuartzModule.cs
index 2429f617d9..fc9ba26367 100644
--- a/framework/src/Volo.Abp.Quartz/Volo/Abp/Quartz/AbpQuartzModule.cs
+++ b/framework/src/Volo.Abp.Quartz/Volo/Abp/Quartz/AbpQuartzModule.cs
@@ -16,9 +16,6 @@ namespace Volo.Abp.Quartz
         {
             var options = context.Services.ExecutePreConfiguredActions<AbpQuartzOptions>();
 
-            // TODO: Remove this once Pomelo update MySqlConnector to >= 1.0.0 : https://github.com/PomeloFoundation/Pomelo.EntityFrameworkCore.MySql/pull/1103
-            AdaptMysqlConnector();
-
             context.Services.AddQuartz(options.Properties, build =>
             {
                 // these are the defaults
@@ -55,7 +52,7 @@ namespace Volo.Abp.Quartz
 
             context.Services.AddSingleton(serviceProvider =>
             {
-                return AsyncHelper.RunSync(() => serviceProvider.GetService<ISchedulerFactory>().GetScheduler());
+                return AsyncHelper.RunSync(() => serviceProvider.GetRequiredService<ISchedulerFactory>().GetScheduler());
             });
 
             Configure<AbpQuartzOptions>(quartzOptions =>
@@ -69,7 +66,7 @@ namespace Volo.Abp.Quartz
         {
             var options = context.ServiceProvider.GetRequiredService<IOptions<AbpQuartzOptions>>().Value;
 
-            _scheduler = context.ServiceProvider.GetService<IScheduler>();
+            _scheduler = context.ServiceProvider.GetRequiredService<IScheduler>();
 
             AsyncHelper.RunSync(() => options.StartSchedulerFactory.Invoke(_scheduler));
         }
@@ -81,28 +78,5 @@ namespace Volo.Abp.Quartz
                 AsyncHelper.RunSync(() => _scheduler.Shutdown());
             }
         }
-
-        private void AdaptMysqlConnector()
-        {
-            var mySqlAvailable = System.Type.GetType("MySql.Data.MySqlClient.MySqlConnection, MySqlConnector") != null;
-            if (mySqlAvailable)
-            {
-                // Overriding the default 'MySqlConnector' provider to use the old 'MySql.Data' namespace found in MySqlConnector < 1.0.0
-                DbProvider.RegisterDbMetadata("MySqlConnector", new DbMetadata()
-                {
-                    ProductName = "MySQL, MySqlConnector provider",
-                    AssemblyName = "MySqlConnector",
-                    ConnectionType = System.Type.GetType("MySql.Data.MySqlClient.MySqlConnection, MySqlConnector"),
-                    CommandType = System.Type.GetType("MySql.Data.MySqlClient.MySqlCommand, MySqlConnector"),
-                    ParameterType = System.Type.GetType("MySql.Data.MySqlClient.MySqlParameter, MySqlConnector"),
-                    ParameterDbType = System.Type.GetType("MySql.Data.MySqlClient.MySqlDbType, MySqlConnector"),
-                    ParameterDbTypePropertyName = "MySqlDbType",
-                    ParameterNamePrefix = "?",
-                    ExceptionType = System.Type.GetType("MySql.Data.MySqlClient.MySqlException, MySqlConnector"),
-                    BindByName = true,
-                    DbBinaryTypeName = "Blob"
-                });
-            }
-        }
     }
 }