Hangfire dashboard Error #9866

10 Answer(s)

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  0

  AI-Bot created one year ago

  Support Team ABP Agent

  • The error System.IO.FileNotFoundException: Could not load file or assembly 'Volo.Abp.BackgroundWorkers.Hangfire' indicates that the Hangfire dashboard is trying to load a background worker type from the assembly Volo.Abp.BackgroundWorkers.Hangfire, but this assembly is missing from your application.

  • This typically happens if you previously used the Volo.Abp.BackgroundWorkers.Hangfire package, registered background workers with it, and then removed the package or related code, but there are still jobs in the Hangfire database referencing types from that assembly.

  How to resolve:

  1. Ensure the Assembly is Present (Recommended for Existing Jobs):
     • Add the missing package back to your project:

  dotnet add package Volo.Abp.BackgroundWorkers.Hangfire
  

  • Rebuild and redeploy your application. This will allow Hangfire to resolve the types for any jobs still in the database.

  2. Clean Up Old Jobs (If You No Longer Use That Worker):

     • If you intentionally removed the background worker and do not need the old jobs, you must manually delete the related jobs from the Hangfire tables ([HangFire].[Job], [HangFire].[State], etc.) in your database that reference the missing type.
     • After cleanup, you can safely remove the package.

  3. Prevent Future Issues:

     • When removing a background worker or related assembly, always ensure that no jobs referencing those types remain in the Hangfire storage.

  Summary:
  Either restore the missing assembly or clean up the orphaned jobs in your Hangfire database to resolve the dashboard error.

  Sources:

  • ABP Hangfire Background Job Manager

  ---

  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.

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  yusufsarman created one year ago

  we alredy added to Volo.Abp.BackgroundWorkers.Hangfire package into Domain Project

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  yusufsarman created one year ago

  We also get this error Hangfire.Common.JobLoadException: Could not load the job. See inner exception for the details. ---> System.IO.FileNotFoundException: Could not load file or assembly 'EnzimWeb.Domain, Culture=neutral, PublicKeyToken=null'. The system cannot find the file specified. File name: 'EnzimWeb.Domain, Culture=neutral, PublicKeyToken=null' at System.Reflection.RuntimeAssembly.<InternalLoad>g____PInvoke|49_0(NativeAssemblyNameParts* __pAssemblyNameParts_native, ObjectHandleOnStack __requestingAssembly_native, StackCrawlMarkHandle __stackMark_native, Int32 __throwOnFileNotFound_native, ObjectHandleOnStack __assemblyLoadContext_native, ObjectHandleOnStack __retAssembly_native) at System.Reflection.RuntimeAssembly.InternalLoad(AssemblyName assemblyName, StackCrawlMark& stackMark, AssemblyLoadContext assemblyLoadContext, RuntimeAssembly requestingAssembly, Boolean throwOnFileNotFound) at System.Reflection.Assembly.Load(AssemblyName assemblyRef) at Hangfire.Common.TypeHelper.AssemblyResolver(String assemblyString) in C:\projects\hangfire-525\src\Hangfire.Core\Common\TypeHelper.cs:line 227 at Hangfire.Common.TypeHelper.CachedAssemblyResolver(AssemblyName assemblyName) in C:\projects\hangfire-525\src\Hangfire.Core\Common\TypeHelper.cs:line 186 at System.Reflection.TypeNameParser.ResolveAssembly(String assemblyName) at System.Reflection.TypeNameParser.GetType(String typeName, ReadOnlySpan1 nestedTypeNames, String assemblyNameIfAny) at System.Reflection.TypeNameParser.NamespaceTypeName.ResolveType(TypeNameParser& parser, String containingAssemblyIfAny) at System.Type.GetType(String typeName, Func2 assemblyResolver, Func4 typeResolver, Boolean throwOnError) at Hangfire.Common.TypeHelper.<>c.<DefaultTypeResolver>b__20_0(String name) in C:\projects\hangfire-525\src\Hangfire.Core\Common\TypeHelper.cs:line 83 at Hangfire.Common.TypeHelper.DefaultTypeResolver(String typeName) in C:\projects\hangfire-525\src\Hangfire.Core\Common\TypeHelper.cs:line 75 at Hangfire.Storage.InvocationData.<>c.<CachedDeserializeMethod>b__33_0(Tuple4 tuple) in C:\projects\hangfire-525\src\Hangfire.Core\Storage\InvocationData.cs:line 335 at Hangfire.Storage.InvocationData.DeserializeJob() in C:\projects\hangfire-525\src\Hangfire.Core\Storage\InvocationData.cs:line 96 --- End of inner exception stack trace --- at Hangfire.Storage.InvocationData.DeserializeJob() in C:\projects\hangfire-525\src\Hangfire.Core\Storage\InvocationData.cs:line 118 at Hangfire.RecurringJobExtensions.TriggerRecurringJob(IBackgroundJobFactory factory, JobStorage storage, IStorageConnection connection, IProfiler profiler, RecurringJobEntity recurringJob, DateTime now) in C:\projects\hangfire-525\src\Hangfire.Core\RecurringJobExtensions.cs:line 115 at Hangfire.Server.RecurringJobScheduler.ScheduleRecurringJob(BackgroundProcessContext context, IStorageConnection connection, String recurringJobId, RecurringJobEntity recurringJob, DateTime now) in C:\projects\hangfire-525\src\Hangfire.Core\Server\RecurringJobScheduler.cs:line 331

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  0

  maliming created one year ago

  Support Team Fullstack Developer

  hi

  Please ensure all abp&volo packages use the same version(9.3.2).

  Can you share a template project that shows this exception?

  liming.ma@volosoft.com Thanks.

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  yusufsarman created one year ago

  Hi ; All Package are Version="9.3.2". we get this error on hangfire dashboard. not in our project

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  maliming created one year ago

  Support Team Fullstack Developer

  hi

  What is your project structure?

  Does your Hangfire server project contain these assemblies(Enzimweb.Domain)?

  Thanks.

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  yusufsarman created one year ago

  Do we need to add the domain project as a dll?

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  maliming created one year ago

  Support Team Fullstack Developer

  hi

  Your Hangfire server retrieves type information from the database and utilizes it in the project. So you need to add these assemblies.

  Thanks.

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  yusufsarman created one year ago

  thanks. The problem resolved

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  maliming created one year ago

  Support Team Fullstack Developer

  Great

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