Azure Function - service bus message sometimes take long time to recieve

[petrkasnal]

Hello,

I have an application where there is one part WebApi (which as you can tell by the name is a webapi app service) and another part Worker (which is an Azure Function). They communicate with each other using Azure Service Bus. The WebApi service calls the Worker - the Started message, and the Worker calls back the WebApi - the Finished message. Everything works quite fine and as it should. The messages don't run extremely often. Mostly once an hour and they don't even run over each other.

However, once a day, typically at 06:00 am, the messages take an extremely long time to send. Roughly 1-2 minutes. Then because of this the state machine also malfunctions ) in my opinion some message expires. Otherwise messages are processed in seconds. For a while I thought it was due to cold start. But the message goes slowly to Worker and to WebApi. I'm getting desperate about this because I can't find any more info. These logs are info from the consumer method. Where there is no other code before the log.

I don't see any errors in the log. The only thing in the log is the occasional message. Which is a known problem and quite annoying
Result: Cancelled Exception: Grpc.Core.RpcException: Status(StatusCode="Cancelled", Detail="Call canceled by the client.", DebugException="System.OperationCanceledException: The operation was canceled.") ---> System.OperationCanceledException: The operation was canceled. --- End of inner exception stack trace --- at Microsoft.Azure.Functions.Worker.ServiceBusMessageActions.CompleteMessageAsync(ServiceBusReceivedMessage message, CancellationToken cancellationToken) in D:\a\_work\1\s\extensions\Worker.Extensions.ServiceBus\src\ServiceBusMessageActions.cs:line 78 at Worker.FunctionApp.DefaultServiceBusFunction.AsTopicResultWithCompleteMessage[TConsumer](ServiceBusReceivedMessage message, ServiceBusMessageActions messageActions, String topic, String subs, CancellationToken cancellationToken) in D:\a\1\s\Src\Worker.FunctionApp\DefaultServiceBusFunction.cs:line 50 at Worker.FunctionApp.Started.Run(ServiceBusReceivedMessage message, ServiceBusMessageActions messageActions, CancellationToken cancellationToken) in D:\a\1\s\Src\Worker.FunctionApp\Started.cs:line 24 at Worker.FunctionApp.DirectFunctionExecutor.ExecuteAsync(FunctionContext context) in D:\a\1\s\Src\Worker.FunctionApp\obj\Release\net8.0\Microsoft.Azure.Functions.Worker.Sdk.Generators\Microsoft.Azure.Functions.Worker.Sdk.Generators.FunctionExecutorGenerator\GeneratedFunctionExecutor.g.cs:line 39 at Microsoft.Azure.Functions.Worker.OutputBindings.OutputBindingsMiddleware.Invoke(FunctionContext context, FunctionExecutionDelegate next) in D:\a\_work\1\s\src\DotNetWorker.Core\OutputBindings\OutputBindingsMiddleware.cs:line 13 at Microsoft.Azure.Functions.Worker.FunctionsApplication.InvokeFunctionAsync(FunctionContext context) in D:\a\_work\1\s\src\DotNetWorker.Core\FunctionsApplication.cs:line 91 at Microsoft.Azure.Functions.Worker.Handlers.InvocationHandler.InvokeAsync(InvocationRequest request) in D:\a\_work\1\s\src\DotNetWorker.Grpc\Handlers\InvocationHandler.cs:line 88 Stack: at Microsoft.Azure.Functions.Worker.ServiceBusMessageActions.CompleteMessageAsync(ServiceBusReceivedMessage message, CancellationToken cancellationToken) in D:\a\_work\1\s\extensions\Worker.Extensions.ServiceBus\src\ServiceBusMessageActions.cs:line 78 at Worker.FunctionApp.DefaultServiceBusFunction.AsTopicResultWithCompleteMessage[TConsumer](ServiceBusReceivedMessage message, ServiceBusMessageActions messageActions, String topic, String subs, CancellationToken cancellationToken) in D:\a\1\s\Src\Worker.FunctionApp\DefaultServiceBusFunction.cs:line 50 at Worker.FunctionApp.Started.Run(ServiceBusReceivedMessage message, ServiceBusMessageActions messageActions, CancellationToken cancellationToken) in D:\a\1\s\Src\Worker.FunctionApp\Started.cs:line 24 at Worker.FunctionApp.DirectFunctionExecutor.ExecuteAsync(FunctionContext context) in D:\a\1\s\Src\Worker.FunctionApp\obj\Release\net8.0\Microsoft.Azure.Functions.Worker.Sdk.Generators\Microsoft.Azure.Functions.Worker.Sdk.Generators.FunctionExecutorGenerator\GeneratedFunctionExecutor.g.cs:line 39 at Microsoft.Azure.Functions.Worker.OutputBindings.OutputBindingsMiddleware.Invoke(FunctionContext context, FunctionExecutionDelegate next) in D:\a\_work\1\s\src\DotNetWorker.Core\OutputBindings\OutputBindingsMiddleware.cs:line 13 at Microsoft.Azure.Functions.Worker.FunctionsApplication.InvokeFunctionAsync(FunctionContext context) in D:\a\_work\1\s\src\DotNetWorker.Core\FunctionsApplication.cs:line 91 at Microsoft.Azure.Functions.Worker.Handlers.InvocationHandler.InvokeAsync(InvocationRequest request) in D:\a\_work\1\s\src\DotNetWorker.Grpc\Handlers\InvocationHandler.cs:line 88
Thank you

[bhagyshricompany]

I checked it seems fine working .please check now.

[petrkasnal]

I checked it seems fine working .please check now.

It's still happening.

[bhagyshricompany]

@kshyju please comment and validate.

[kshyju]

I suspect this is something specific to your application. Recommend opening a support ticket so that the team can take a look at your application. Thanks!