Experiencing Data Loss for Log Analytics – 11/19 – Resolved

This post has been republished via RSS; it originally appeared at: New blog articles in Microsoft Tech Community.

Final Update: Friday, 19 November 2021 22:13 UTC

We've confirmed that all systems are back to normal as of 11/19, 20:24 UTC. Our logs show that the incident started on 11/19, 15:35 UTC and that during the 4 hours and 49 minutes that it took to resolve the issue some of the customers using Azure Log Analytics and/or Sentinel might have experienced data gaps, partial query results and incorrect alerts activation in Germany West Central region.
  • Root Cause: The failure was due to a recent configuration change in one of our backend services.
  • Incident Timeline: 4 Hours & 49 minutes - 11/19, 15:35 UTC through 11/19, 20:24 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.


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