Experiencing Data gaps for Availability data – 02/01 – Resolved


Final Update: Monday, 01 February 2016 22:31 UTC

We’ve experienced a reoccurrence of an edge case bug before the hotfix could deploy.  All operations are back to normal with no customer impact as of 2/1, 21:45 UTC. Our logs show the incident started on 2/1, 20:43 UTC and that during the 1 hour, 2 minutes that it took to resolve the issue,  customers may have experienced a loss of availability data for web tests configured through the CA-SanJose, FL-Miami, IL-Chicago, TX-SanAntonio, and VA-Ashburn regions.

  • Root Cause: The failure was due a bug being triggered in our global availability test nodes, causing them to fail to emit proper telemetry.
  • Lessons Learned: There is further risk of reoccurrence until the hotfix is fully tested and deployed.
  • Incident Timeline: 1 Hour & 2 minutes – 2/1, 20:43 UTC through 2/1, 21:45 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


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