Experiencing Data Access Issue in Azure portal for Log Analytics - 08/25 - Resolved

[Azure-Monitor-Team]

Final Update: Sunday, 25 August 2019 18:56 UTC

We've confirmed that all systems are back to normal with no customer impact as of 8/25, 18:00 UTC. Our logs show the incident started on 8/25, 16:30 UTC and that during the incident customers using Log Analytics in USGov Virginia may have received failure notifications - such as HTTP 502 Gateway Timeout or 503 Service Unavailable - when performing log search operations for data access. Alerting may have also been delayed. Tiles and blades may also have failed to load and display data.

• Preliminary Root Cause: Engineers determined that instances of a backend service became unhealthy, preventing these requests from completing.
• Mitigation: Engineers performed a manual restart of a backend service to mitigate the issue

We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.

-Azure Monitor SRE

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Initial Update: Sunday, 25 August 2019 17:43 UTC

We are aware of issues within Log Analytics and are actively investigating. Some customers may experience Data Access issues and Alerts may also be impacted in US national Cloud.

• Work Around: None
• Next Update: Before 08/25 20:00 UTC

We are working hard to resolve this issue and apologize for any inconvenience.
-Azure Monitor SRE

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