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First published on MSDN on Jan 22, 2019
Final Update: Tuesday, 22 January 2019 19:10 UTC

We've confirmed that all systems are back to normal with no customer impact as of 01/22, 19:00 UTC. Our logs show the incident started on 01/22, 17:30 UTC and that during the 1 hour 30 min that it took to resolve the issue some customers might have experienced Data access and Latency issues in portal(Azure and OMS) for East US region.
  • Root Cause: The failure was due to an issue with dependent service.
  • Incident Timeline: 1 Hour & 30 minutes - 01/22, 17:30 UTC through 01/22, 19:00 UTC
We understand that customers rely on Azure Log Analytics as a critical service and apologize for any impact this incident caused.

-Venkat
Update: Tuesday, 22 January 2019 18:26 UTC

Some Log Analytics customers may experience Data access and Latency issues in portal(Azure and OMS) for East US region. we  applied the mitigation and estimate this issue will be mitigated in 1 hour.

  • Work Around: none
  • Next Update: Before 01/22 19:30 UTC
-venkat