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IoT Telemetry Pipeline Regression After Recent Deployment

Sai Manasa Ivaturi 0 Reputation points Microsoft Employee
2026-05-19T14:51:24.1166667+00:00

A regression has been introduced after the latest deployment impacting IoT data processing. Telemetry that was previously flowing correctly is now partially or fully blocked.

Indicators:

  • Issue started immediately after rollout
  • Deployment logs show no critical failures, but runtime issues observed
  • Prior builds did not exhibit this behavior

Focus Areas:

  • Configuration drift
  • API contract changes
  • Dependency/service version mismatchA regression has been introduced after the latest deployment impacting IoT data processing. Telemetry that was previously flowing correctly is now partially or fully blocked. Indicators:
    • Issue started immediately after rollout
    • Deployment logs show no critical failures, but runtime issues observed
    • Prior builds did not exhibit this behavior
    Focus Areas:
    • Configuration drift
    • API contract changes
    • Dependency/service version mismatch
Azure IoT Hub
Azure IoT Hub

An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.

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  1. Sander van de Velde | MVP 37,061 Reputation points MVP
    2026-05-20T21:02:37.9733333+00:00

    Hello @Sai Manasa Ivaturi ,

    welcome to this Azure community forum.

    From what I understand, you see a degradation in a data messaging stream in the Azure IoT Hub Stream.

    Please check the Azure portal health is there is a service degradation in your area.

    Als check if the daily limit is already reached in your IoT Hub.

    Next, monitor the stream via tooling like IoT Explorer, the IoT Hub extension in Visual Studio code, the Data Explorer message visualization in EventHub when messages are routed to this service, or Azure Data Explorer as monitoring tool.

    Double-check if consumer group names (especially $default) are used by multiple subscribers. Each subscriber should use its own specific consumer group so no message loss is experienced that way.

    If you still experience a degraded service, consider creating an Azure support ticket so the support team can assist you.

    If the response helped, do "Accept Answer". If it doesn't work, please let us know the progress. All community members with similar issues will benefit by doing so. Your contribution is highly appreciated.

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