記錄一次刪除檔案失敗的問題

一段很簡單的刪除檔案的C#程式碼,在IIS中有部分檔案會出現刪除失敗的情況,錯誤提示如下:
2024-03-31 17:40:21.981 +08:00 [ERR] Access to the path 'C:\projects\ows.services.dignite.com\wwwroot\tenants\b384a371-835f-e19b-4d4d-3a1104e4c4a6\files\1734aa3d61314c1b9735d59b516db7e4' is denied. System.UnauthorizedAccessException: Access to the path 'C:\projects\ows.services.dignite.com\wwwroot\tenants\b384a371-835f-e19b-4d4d-3a1104e4c4a6\files\1734aa3d61314c1b9735d59b516db7e4' is denied. at System.IO.FileSystem.DeleteFile(String fullPath) at Volo.Abp.IO.FileHelper.DeleteIfExists(String filePath) at Volo.Abp.BlobStoring.FileSystem.FileSystemBlobProvider.DeleteAsync(BlobProviderDeleteArgs args) at Volo.Abp.BlobStoring.BlobContainer.DeleteAsync(String name, CancellationToken cancellationToken) at Dignite.Abp.Files.FileManager2.DeleteAsync(TFile file, CancellationToken cancellationToken)
at Dignite.FileExplorer.Files.FileDescriptorAppService.DeleteAsync(Guid id)
at Castle.DynamicProxy.AsyncInterceptorBase.ProceedAsynchronous(IInvocation invocation, IInvocationProceedInfo proceedInfo)
at Volo.Abp.Castle.DynamicProxy.CastleAbpMethodInvocationAdapter.ProceedAsync()
at Volo.Abp.Authorization.AuthorizationInterceptor.InterceptAsync(IAbpMethodInvocation invocation)
at Volo.Abp.Castle.DynamicProxy.CastleAsyncAbpInterceptorAdapter1.InterceptAsync(IInvocation invocation, IInvocationProceedInfo proceedInfo, Func3 proceed)
at Castle.DynamicProxy.AsyncInterceptorBase.ProceedAsynchronous(IInvocation invocation, IInvocationProceedInfo proceedInfo)
at Volo.Abp.Castle.DynamicProxy.CastleAbpMethodInvocationAdapter.ProceedAsync()
at Volo.Abp.GlobalFeatures.GlobalFeatureInterceptor.InterceptAsync(IAbpMethodInvocation invocation)
at Volo.Abp.Castle.DynamicProxy.CastleAsyncAbpInterceptorAdapter1.InterceptAsync(IInvocation invocation, IInvocationProceedInfo proceedInfo, Func3 proceed)
at Castle.DynamicProxy.AsyncInterceptorBase.ProceedAsynchronous(IInvocation invocation, IInvocationProceedInfo proceedInfo)
at Volo.Abp.Castle.DynamicProxy.CastleAbpMethodInvocationAdapter.ProceedAsync()
at Volo.Abp.Auditing.AuditingInterceptor.ProceedByLoggingAsync(IAbpMethodInvocation invocation, AbpAuditingOptions options, IAuditingHelper auditingHelper, IAuditLogScope auditLogScope)
at Volo.Abp.Auditing.AuditingInterceptor.InterceptAsync(IAbpMethodInvocation invocation)
at Volo.Abp.Castle.DynamicProxy.CastleAsyncAbpInterceptorAdapter1.InterceptAsync(IInvocation invocation, IInvocationProceedInfo proceedInfo, Func3 proceed)
at Castle.DynamicProxy.AsyncInterceptorBase.ProceedAsynchronous(IInvocation invocation, IInvocationProceedInfo proceedInfo)
at Volo.Abp.Castle.DynamicProxy.CastleAbpMethodInvocationAdapter.ProceedAsync()
at Volo.Abp.Validation.ValidationInterceptor.InterceptAsync(IAbpMethodInvocation invocation)
at Volo.Abp.Castle.DynamicProxy.CastleAsyncAbpInterceptorAdapter1.InterceptAsync(IInvocation invocation, IInvocationProceedInfo proceedInfo, Func3 proceed)
at Castle.DynamicProxy.AsyncInterceptorBase.ProceedAsynchronous(IInvocation invocation, IInvocationProceedInfo proceedInfo)
at Volo.Abp.Castle.DynamicProxy.CastleAbpMethodInvocationAdapter.ProceedAsync()
at Volo.Abp.Uow.UnitOfWorkInterceptor.InterceptAsync(IAbpMethodInvocation invocation)
at Volo.Abp.Castle.DynamicProxy.CastleAsyncAbpInterceptorAdapter1.InterceptAsync(IInvocation invocation, IInvocationProceedInfo proceedInfo, Func3 proceed)
at Dignite.FileExplorer.Files.FileDescriptorController.DeleteAsync(Guid id)
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskResultExecutor.Execute(ActionContext actionContext, IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask1 actionResultValueTask) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextExceptionFilterAsync>g__Awaited|26_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
並不是每個檔案都出現刪除失敗,所以從程式碼上沒有找到問題.
剛剛嘗試在IIS中將站點應用池中的高階選項:標識改為LocalSystem,每個檔案都能成功刪除.

至少是什麼原因,也沒有深究.有了解了很留言指教.