Experiencing Data Latency for Many Data Types – 12/22 – Resolved


Final Update: Tuesday, 22 December 2015 21:05 UTC

We’ve confirmed that all systems are back to normal with no customer impact as of 12/22/2015, 20:35 UTC. Our logs show the incident started on 12/22/2015, 18:40 UTC and that during the 1 hour and 55 minutes that it took to resolve the issue some customers would have experience data latency.

  • Root Cause: The failure was due to an issue with the backend processing infrastructure, where some systems stopped processing incoming data.
  • Lessons Learned: Are engineering team is reviewing available telemetry to determine root cause.
  • Incident Timeline: 1 Hours & 55 minutes – 12/22/2015, 18:40 UTC through 12/22/2015, 20:35 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

Update: Tuesday, 22 December 2015 20:05 UTC

Root cause has been isolated to an issue with the backend processing infrastructure, where some systems stopped processing incoming data. Processing is now working as expected. Some customers may continue to experience data latency and we estimate 2 hours before all latency is addressed.
  • Work Around: None
  • Next Update: Before 12/22 22:30 UTC

-Application Insights Service Delivery Team


Initial Update: Tuesday, 22 December 2015 18:40 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.
  • Work Around: None
  • Next Update: Before 12/22 21:00 UTC

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


Skip to main content