0
dhill created
- Exception message and full stack trace:
- Steps to reproduce the issue:
ABP 9.2.2 with Blazor Web App
We are getting random exceptions System.ObjectDisposedException when the system is under load.
======================================================== Dump Analysis for
Thread 6892 ExitCode E0434352 ExitCodeString CLR EXCEPTION DefaultHostName xxx.azurewebsites.net Managed Exception = System.ObjectDisposedException:Instances cannot be resolved and nested lifetimes cannot be created from this LifetimeScope as it (or one of its parent scopes) has already been disposed. CallStack - Managed Exception
Autofac.Core.Lifetime.LifetimeScope.ThrowDisposedException()
Blazorise.ComponentActivator.CreateInstance(System.Type)
Microsoft.AspNetCore.Components.RenderTree.Renderer.InstantiateChildComponentOnFrame(Microsoft.AspNetCore.Components.RenderTree.RenderTreeFrame[], Int32, Int32)
Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewSubtree(DiffContext ByRef, Int32)
Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InsertNewFrame(DiffContext ByRef, Int32)
Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext ByRef, Int32, Int32, Int32, Int32)
Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(Microsoft.AspNetCore.Components.Rendering.RenderBatchBuilder, Microsoft.AspNetCore.Components.RenderFragment, System.Exception ByRef)
Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
Microsoft.AspNetCore.Components.HtmlRendering.Infrastructure.StaticHtmlRenderer.HandleException(System.Exception)
Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
Microsoft.AspNetCore.Components.ComponentBase.StateHasChanged()
Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.<InvokeAsync>g__Execute|8_0(System.ValueTuple`3<System.Runtime.CompilerServices.AsyncTaskMethodBuilder,System.Action,Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext>)
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task, System.Threading.Tasks.ConfigureAwaitOptions)
Volo.Abp.AspNetCore.Components.Web.LeptonXTheme.Components.ApplicationLayout.Common.ContentToolbar+<<OnInitializedAsync>b__7_1>d.MoveNext()
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
System.Threading.Tasks.Task+<>c.<ThrowAsync>b__128_1(System.Object)
System.Threading.QueueUserWorkItemCallback.Execute()
System.Threading.ThreadPoolWorkQueue.Dispatch()
System.Threading.PortableThreadPool+WorkerThread.WorkerThreadStart()
CallStack - Crashing Thread
InlinedCallFrame
InlinedCallFrame
System.Runtime.EH.DispatchEx(System.Runtime.StackFrameIterator ByRef, ExInfo ByRef)
System.Runtime.EH.RhThrowEx(System.Object, ExInfo ByRef)
HelperMethodFrame
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
System.Threading.Tasks.Task+<>c.<ThrowAsync>b__128_1(System.Object)
System.Threading.QueueUserWorkItemCallback.Execute()
System.Threading.ThreadPoolWorkQueue.Dispatch()
System.Threading.PortableThreadPool+WorkerThread.WorkerThreadStart()
DebuggerU2MCatchHandlerFrame
Native Call Stack
KERNELBASE!RaiseException+0x6c coreclr!SfiNext+0xea0fe coreclr!InlinedCallFrame::`vftable'
======================================================== Dump Analysis for
Thread 6892 ExitCode E0434352 ExitCodeString CLR EXCEPTION DefaultHostName xxx.azurewebsites.net CallStack - Crashing Thread
1 Answer(s)
-
0
- The
System.ObjectDisposedException
with Autofac'sLifetimeScope
in ABP Blazor applications typically occurs when a service or DbContext is accessed after its DI scope has been disposed. This is often seen under load or with improper async usage.
Common Causes and Solutions:
Async/Await Pitfalls:
- If you start an async operation (e.g., in an event handler or background task) and do not properly await it, the DI scope may be disposed before the operation completes.
- Always
await
async methods, especially in event handlers, background jobs, or distributed event handlers.
Manual Service Scope Management:
- If you manually create service scopes, ensure all operations using the scope complete before disposing it.
- Do not wrap injected services in
using
statements; let the DI container manage their lifetimes.
Unit of Work (UoW) Usage:
- Do not disable the UnitOfWork pipeline unless you are managing it explicitly with
IUnitOfWorkManager
. - If you need a non-transactional UoW, use
[UnitOfWork(isTransactional: false)]
on your method.
- Do not disable the UnitOfWork pipeline unless you are managing it explicitly with
Blazor Component Lifetimes:
- Avoid holding references to injected services or DbContexts in fields that outlive the component's lifetime.
- Do not use services after the component is disposed.
Example: Proper Async Usage in Event Handlers
public async Task HandleEventAsync(MyEventData eventData) { // Always await async operations await _myService.DoSomethingAsync(eventData); }
Example: Manual UnitOfWork Management
using (var uow = _unitOfWorkManager.Begin(requiresNew: true, isTransactional: false)) { // ... your logic here await uow.CompleteAsync(); }
Checklist:
- Ensure all async methods are awaited.
- Do not use disposed services or DbContexts.
- Let DI manage service lifetimes.
- Use UoW properly; do not disable unless you manage it manually.
If the problem persists under load:
- Review all background tasks, event handlers, and async code for proper scope and lifetime management.
- Check for any static or long-lived references to scoped services.
Sources:
- ABP Exception Handling
- ABP Support: ObjectDisposedException when UnitOfWork disabled
- ABP Support: ObjectDisposedException in distributed event handler
This response was generated by AI. If it didn’t solve your problem, feel free to post a new answer — our support team will jump in to help you soon.
- The