Experiencing Alerting failure for Availability Data Type – 08/23 – Resolved

Final Update: Thursday, 24 August 2017 03:40 UTC

We've confirmed that all systems are back to normal with no customer impact as of 8/23, 23:45 UTC. Our logs show the incident started on 8/23, 22:00 UTC and that during the 1 hour and 45 minutes that it took to resolve the issue 100% of customers, who configured their availability monitors in Moscow location, experienced availability data gaps in Moscow location.
  • Root Cause: The failure was due to physical network failure because of road constriction work next to Moscow datacenter.
  • Lessons Learned: N/A
  • Incident Timeline:  1 Hour & 45 minutes - 8/23, 22:00 UTC through 8/23, 23:45 UTC

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


Update: Thursday, 24 August 2017 01:10 UTC

Root cause has been isolated to physical network issue in Moscow datacenter due to road construction which was impacting Application Insights availability monitors in Moscow location. To address this issue we engaged local network team, who was able to restore connectivity in Moscow datacenter. Even though connectivity had been restored, physical network repair work is still in progress in Moscow location. Network team is estimating that work should be completed by 4:00 UTC. Some customers may experience availability data gaps in Moscow location, until physical network repairs are competed.
  • Work Around: Use other available locations
  • Next Update: Before 08/24 07:30 UTC


Initial Update: Wednesday, 23 August 2017 22:55 UTC

We are aware of issues within Application Insights and are actively investigating. Customers, who configured availability monitors from Moscow location, won't see any availability data in that location.
  • Work Around: Use other available locations
  • Next Update: Before 08/24 01:00 UTC

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

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