Experiencing Data Gaps in Azure portal for Log Analytics in East US 2 – 11/05 – Resolved

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Final Update: Thursday, 05 November 2020 20:51 UTC

We've confirmed that all systems are back to normal with no customer impact as of 11/5, 20:22 UTC. Our logs show the incident started on 11/5, 19:45 UTC and that during the 37 minutes that it took to resolve the issue 166 customers experienced latent log ingestion and possible data gaps.
  • Root Cause: The failure was due to backend cache being pushed past an operational threshold. The system was scaled out to mitigate the issue.
  • Incident Timeline: 37 minutes - 11/5, 19:45 UTC through 11/5, 20:22 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.


Initial Update: Thursday, 05 November 2020 20:13 UTC

We are aware of issues within Log Analytics and are actively investigating. Some customers in East US 2 region may be experiencing intermittent data gaps.
  • Next Update: Before 11/05 22:30 UTC
We are working hard to resolve this issue and apologize for any inconvenience.

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