Outage in Microsoft Azure

Azure Monitor - Logs Data Access Issues - Mitigated

Resolved Minor
July 06, 2023 - Started over 2 years ago - Lasted about 10 hours

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Outage Details

Summary of Impact: Between at 23:15 UTC on 06 Jul 2023 and 09:00 UTC on 07 July 2023, customers using Azure Monitor may have experienced issues accessing logs, data gaps, and missed / latent alerts. Preliminary Root Cause: We determined a configuration issue triggered a bug, causing a significant unexpected increase in traffic, causing one of our backend services responsible for processing and storing logs to reach throughput limits. This caused the service's control plane to become unresponsive, leading to services becoming unable to retrieve authentication tokens. The resulting impact spread to multiple regions.Mitigation: We throttled heavy consumers and spun up additional infrastructure to process the incoming load, as well as the backlog of requests.Next Steps: We will follow up in 3 days with a preliminary Post Incident Report (PIR), which'll cover the main root cause and repair items. We'll follow that up 14 days later with a final PIR where we will share a deep dive into the incident.  Stay informed about Azure service issues by creating custom service health alerts: https://aka.ms/ash-videos for video tutorials and https://aka.ms/ash-alerts for how-to documentation.
Components affected
Microsoft Azure Application Insights Microsoft Azure ‡Sweden South Microsoft Azure Log Analytics Microsoft Azure Application Insights Microsoft Azure Application Insights Microsoft Azure Application Insights Microsoft Azure Azure Monitor Microsoft Azure Log Analytics Microsoft Azure Switzerland North Microsoft Azure Log Analytics Microsoft Azure Brazil South Microsoft Azure Application Insights Microsoft Azure UK South Microsoft Azure Activity Log Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Germany North Microsoft Azure Germany West Central Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Application Insights Microsoft Azure Application Insights Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Diagnostic Logs Microsoft Azure Japan West Microsoft Azure Log Analytics Microsoft Azure South Africa West Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Application Insights Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Log Analytics Microsoft Azure Log Analytics Microsoft Azure Norway West Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Australia Southeast Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure South Central US Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Log Analytics Microsoft Azure Log Analytics Microsoft Azure Log Analytics Microsoft Azure Canada East Microsoft Azure Australia Central 2 Microsoft Azure Application Insights Microsoft Azure Brazil Southeast Microsoft Azure France Central Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure ‡Qatar Central Microsoft Azure Application Insights Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Log Analytics Microsoft Azure North Central US Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure West Europe Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Switzerland West Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Southeast Asia Microsoft Azure Australia Central Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Log Analytics Microsoft Azure Central India Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure South Africa North Microsoft Azure West US 2 Microsoft Azure ‡West US 3 Microsoft Azure East Asia Microsoft Azure Australia East Microsoft Azure West India Microsoft Azure Central US Microsoft Azure Canada Central Microsoft Azure East US Microsoft Azure West Central US Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Application Insights Microsoft Azure North Europe Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Norway East Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Japan East Microsoft Azure Jio India West Microsoft Azure *Non-Regional Microsoft Azure France South Microsoft Azure UK West Microsoft Azure ‡Sweden Central Microsoft Azure Log Analytics Microsoft Azure Korea Central Microsoft Azure Korea South Microsoft Azure Jio India Central Microsoft Azure East US 2 Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Log Analytics Microsoft Azure Application Insights Microsoft Azure West US Microsoft Azure South India Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Alerts

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