Experiencing Data Latency for Many Data Types - 01/21 - Resolved


Final Update: Thursday, 21 January 2016 19:56 UTC

We've confirmed that all systems are back to normal with no customer impact as of 1/21, 19:56 UTC. Our logs show the incident started on 1/21, 15:21 UTC and that during the 4 hours that it took to resolve the issue customers experienced latency for many data types over the 2 hour SLA.
  • Root Cause: The failure was due to increased traffic in one of our backend services. We scaled out our backend service in order to deal with the increased traffic.
  • Lessons Learned: We are digging into the source of the increased traffic to try and reduce this type of issue from occurring in the future.
  • Incident Timeline: 4 Hours & 29 minutes - 1/21, 15:21 UTC through 1/21, 19:56 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: Thursday, 21 January 2016 19:25 UTC

Root cause has been isolated to an increase of traffic in one of our backend services which was impacting telemetry data to be outside of 2 hour latency. To address this issue we have scaled out our backend service.  Current data is now up to date below the 2 hour SLA. Some customers may experience data gaps with data outside of the 2 hour SLA. We estimate that these data gaps will be filled in within 3 hours.

  • Next Update: Before 01/21 22:30 UTC

-Application Insights Service Delivery Team


Initial Update: Thursday, 21 January 2016 16:39 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: Many Data Types

  • Next Update: Before 01/21 20:00 UTC

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




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