diff --git a/framework/src/Volo.Abp.Core/Volo/Abp/ExceptionHandling/NullExceptionNotifier.cs b/framework/src/Volo.Abp.Core/Volo/Abp/ExceptionHandling/NullExceptionNotifier.cs
new file mode 100644
index 0000000000..77043cba48
--- /dev/null
+++ b/framework/src/Volo.Abp.Core/Volo/Abp/ExceptionHandling/NullExceptionNotifier.cs
@@ -0,0 +1,19 @@
+using System.Threading.Tasks;
+
+namespace Volo.Abp.ExceptionHandling
+{
+    public class NullExceptionNotifier : IExceptionNotifier
+    {
+        public static NullExceptionNotifier Instance { get; } = new NullExceptionNotifier();
+
+        private NullExceptionNotifier()
+        {
+            
+        }
+
+        public Task NotifyAsync(ExceptionNotificationContext context)
+        {
+            return Task.CompletedTask;
+        }
+    }
+}
\ No newline at end of file
diff --git a/framework/src/Volo.Abp.Threading/Volo/Abp/Threading/AbpTimer.cs b/framework/src/Volo.Abp.Threading/Volo/Abp/Threading/AbpTimer.cs
index a68d15c7a2..5c5041cdf6 100644
--- a/framework/src/Volo.Abp.Threading/Volo/Abp/Threading/AbpTimer.cs
+++ b/framework/src/Volo.Abp.Threading/Volo/Abp/Threading/AbpTimer.cs
@@ -30,15 +30,15 @@ namespace Volo.Abp.Threading
 
         public ILogger<AbpTimer> Logger { get; set; }
 
-        protected IExceptionNotifier ExceptionNotifier { get; }
+        public IExceptionNotifier ExceptionNotifier { get; set; }
 
         private readonly Timer _taskTimer;
         private volatile bool _performingTasks;
         private volatile bool _isRunning;
 
-        public AbpTimer(IExceptionNotifier exceptionNotifier)
+        public AbpTimer()
         {
-            ExceptionNotifier = exceptionNotifier;
+            ExceptionNotifier = NullExceptionNotifier.Instance;
             Logger = NullLogger<AbpTimer>.Instance;
 
             _taskTimer = new Timer(