Скачать или смотреть How to Set Autocomplete in MessageHandlerOptions for Azure Service Bus in .NET Core 3.1

Learn how to configure `autocomplete` settings in Azure Service Bus MessageHandlerOptions for .NET Core 3.1 to avoid message processing errors.
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How to Set Autocomplete in MessageHandlerOptions for Azure Service Bus in .NET Core 3.1

When working with Azure Service Bus in your .NET Core 3.1 web jobs, you may encounter issues related to message completion—specifically, the error message: "The lock supplied is invalid. Either the lock expired, or the message has already been removed from the queue, or was received by a different receiver instance." This problem arises when your message processing logic tries to complete or dead-letter a message but the system automatically completes the message before your logic executes.

Understanding the Problem

In Azure Service Bus, when a message is received, it is locked for processing by one of the receivers. If the message is completed automatically (which is the default behavior), it cannot be completed again, leading to the error mentioned above. To solve this issue, you need to disable the automatic message completion by setting AutoComplete to false in the MessageHandlerOptions.

Configuring MessageHandlerOptions

Here are the clear steps to set AutoComplete to false:

Step 1: Update Your Startup Configuration

You can set the MessageHandlerOptions directly in your service configuration using the AddServiceBus method. Here’s how you can do it:

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Step 2: Processing Messages Correctly

With automatic message completion disabled, you can now handle messages without the worry of them being completed prematurely. In your message processing implementation, ensure you handle both successful completion and dead-lettering appropriately. Here's a sample message processor:

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Step 3: Resolve Configuration Issues

If you're having issues with your appsettings.json not being picked up, make sure you're properly configuring your services in the startup class.

[[See Video to Reveal this Text or Code Snippet]]

If this configuration is still not applied correctly, review your configuration setup ensuring that your configuration is being loaded properly at startup.

Conclusion

Attaining control over the message completion behavior in Azure Service Bus is crucial for preventing unexpected errors in your web jobs. By following the steps outlined above, you can disable the automatic message completion functionality and better manage your message processing in .NET Core 3.1 applications. This ensures you won't face the common lock-related errors, allowing for smoother and more resilient message handling.

If you have any questions or need further assistance, feel free to reach out in the comments!