We've confirmed that all systems are back to normal as of 02/15, 16:45 UTC. Our logs show the incident started on 02/15, 13:00 UTC and that during the time it took to resolve the issue Azure Log Analytics customers experienced gaps in data sent between 13:00 UTC and 15:00 UTC
Root Cause: The failure was due to compute infrastructure that stopped the service from functioning.
Incident Timeline: 02/15, 13:00 UTC through 02/15, 16:45 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.
Update: Tuesday, 15 February 2022 16:30 UTC
Due to backend infrastructure failure, customers in South UK region may experience data gaps for data sent to Azure Log Analytics between 02/15 1:00 PM UTC - 3:00 PM UTC, and we estimate 2 hours before the data gaps are addressed.