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Final Update: Thursday, 07 November 2019 19:37 UTC
We've confirmed that all systems are back to normal as of 11/07, 18:40 UTC. Our logs show the incident started on 11/07, 13:40 UTC and that during the 3 hours 35 minutes that it took to resolve the issue some of customers ingesting telemetry in East US geographical region may have experienced intermittent data gaps and latency while accessing application data .
Root Cause: The failure was due to one of our backend services entering unhealthy state.
Incident Timeline: 3 Hours & 35 minutes - 11/07, 13:40 UTC through 11/07, 17:15 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.