Experiencing Data Gaps for Multiple Functional Areas – 02/22 – Resolved

Final Update: Monday, 22 February 2016 02:03 UTC

We've confirmed that all systems are back to normal with no customer impact as of 2/22, 01:45 UTC. Our logs show the incident started on 2/21, 20:45 UTC and that during the 5 hours that it took to resolve the issue some customers experienced data loss up to 4%.
  • Root Cause: The failure was due to a bug in one of the Application Insights services.
  • Lessons Learned: Bug was fixed and hotfix was deployed to address this issue.
  • Incident Timeline: 5 Hours - 2/21, 20:45 UTC through 2/22, 01:45 UTC

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


Initial Update: Monday, 22 February 2016 00:39 UTC

We are aware of issues within Application Insights and are actively investigating. Some customers may experience Data Gaps. The following data types are affected: Customer Event,Dependency,Exception,Metric,Page Load,Page View,Performance Counter,Request,Trace.
  • Work Around: None
  • Next Update: Before 02/22 03:00 UTC

We are working hard to resolve this issue and apologize for any inconvenience.

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