We've confirmed that all systems are back to normal with no customer impact as of 07/27, 17:50 UTC. Our logs show the incident started on 07/27, 08:05 UTC and that during the 10 hours that it took to resolve the issue customers may have been unable to query metric data, and/or may have received failure notifications when retrieving Application Insights data.
Root Cause: The failure was due to a
recent deployment that prevented submitted data from fully propagating through
our backend systems
Lessons Learned: Engineers will continue to
investigate deployment procedures to prevent future recurrences of this issue
Incident Timeline: 9 Hours & 45 minutes - 07/27, 08:05 UTC through 07/27, 17:50 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.
Initial Update: Friday, 27 July 2018 17:46 UTC
We are aware of issues within Application Insights and are actively investigating. Some customers in West Europe region may experience metrics Data Latency.
Work Around: None
Next Update: Before 07/27 20:00 UTC
We are working hard to resolve this issue and apologize for any inconvenience.