Final Update: Tuesday, 10 August 2021 08:09 UTC
We've confirmed that all systems are back to normal with no customer impact as of 08/10, 07:20 UTC. Our logs show the incident started on 08/10, 00:00 UTC and that during the 7:20 hours that it took to resolve the issue. Some customers may have experienced missing or misfired alerts when using Azure Metric Alerts Rules on Log Analytics resources in West Europe region.
- Root Cause: The failure was due to some instances of a backend service became unhealthy after reaching an operational threshold.
- Incident Timeline: 7 Hours & 20 minutes - 08/10, 00:00 UTC through 08/10, 07:20 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.
-Mohsin Inamdar
Update: Tuesday, 10 August 2021 06:56 UTC
Azure Log Analytics service is having issue with ingesting data and root
cause has been isolated to some instances of a backend service became unhealthy after reaching an operational threshold. This resulted in the service becoming unavailable which was impacting InMem processing service. To address this issue we performed a scale up to mitigate the issue. Processes Logs are now working as expected. Some customers may experience missing or misfired alerts when using Azure Metric Alert Rules on Log Analytics resources.
- Work Around: None.
- Next Update: Before 08/10 10:00 UTC
We are working hard to resolve this issue and apologize for any inconvenience
-Mohsin Inamdar
Initial Update: Tuesday, 10 August 2021 04:23 UTC
We are aware of issues within Azure Monitor and are actively investigating. Some customers in West Europe may be experiencing missing or misfired alerts when using azure metric Alerts Rules on Log Analytics resources.
- Work Around: none
- Start Time: 8/10 00:00 UTC
- Next Update: Before 08/10 08:30 UTC
We are working hard to resolve this issue and apologize for any inconvenience.
-Eric Singleton
