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Timer trigger function stopped running between 12:30 AM and 1:30 PM today without any reason

Pranab Nath 0 Reputation points
2025-12-03T20:59:51.4366667+00:00

func-gen-route-est-mileage-ev-prod function app stopped running after 12:00AM on 3rd Dec. untill it was redeployed. Need a technical explanation of this problem. It is a production function app and such issues raise question on Azure service reliability.

Azure Functions
Azure Functions
An Azure service that provides an event-driven serverless compute platform.

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  1. Pravallika KV 3,565 Reputation points Microsoft External Staff Moderator
    2025-12-03T21:12:54.67+00:00

    Hi Pranab Nath,

    Thanks for reaching out to Microsoft Q&A.

    Upon investigating further, found that the Function App runtime encountered the below exceptions:

    1. No job functions found. Try making your job classes and methods public. If you're using binding extensions (e.g. Azure Storage, ServiceBus, Timers, etc.) make sure you've called the registration method for the extension(s) in your startup code (e.g. builder.AddAzureStorage(), builder.AddServiceBus(), builder.AddTimers(), etc.).
    2. Your app is using a deprecated version - 2.35.0 of extension bundles. Upgrade to a supported version: https://aka.ms/FunctionsBundlesUpgrade

    And also, the function app failed to acquire Singleton lock for 3 times.

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