Experiencing Data Latency for Many Data Types – 01/03 – Resolved


Final Update: Sunday, 03 January 2016 11:51 UTC

We've confirmed that all systems are back to normal with no customer impact as of 1/3, 11:30 UTC. Our logs show the incident started on 1/3, 06:10 UTC and that during the 5 hours 20 minutes that it took to resolve the issue customers would have experienced data latency. Our monitoring system is healthy and all data streams are processing current data however some customer will continue to see missing data ingested during impact duration. We are investigating ways to backfill this data.
  • Root Cause: The failure was due to performance degradation of dependent service due to surge in traffic.
  • Lessons Learned: Pending on RCA. Additional telemetry will be collected to understand this issue further.
  • Incident Timeline: 5 Hours & 20 minutes - 1/3, 06:10 UTC through 1/3, 11:30 UTC

We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.

-Application Insights Service Delivery Team


Initial Update: Sunday, 03 January 2016 08:00 UTC

We are aware of issues within Application Insights and are actively investigating. Some customers may experience Data Latency. The following data types are affected: Availability,Customer Event,Dependency,Exception,Metric,Page Load,Page View,Performance Counter,Request,Trace.
  • Next Update: Before 01/03 12:00 UTC

We are working hard to resolve this issue and apologize for any inconvenience.
-Application Insights Service Delivery Team


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