%3CLINGO-SUB%20id%3D%22lingo-sub-2140597%22%20slang%3D%22en-US%22%3EExperiencing%20Data%20Gaps%20issue%20in%20Azure%20Portal%20for%20Many%20Data%20Types%20-%2002%2F16%20-%20Resolved%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2140597%22%20slang%3D%22en-US%22%3E%3CDIV%20style%3D%22font-size%3A14px%3B%22%3E%3CDIV%20style%3D%22font-size%3A14px%3B%22%3E%3CU%3EFinal%20Update%3C%2FU%3E%3A%20Tuesday%2C%2016%20February%202021%2021%3A34%20UTC%3CBR%20%2F%3E%3CBR%20%2F%3EWe've%20confirmed%20that%20all%20systems%20are%20back%20to%20normal%20with%20no%20customer%20impact%20as%20of%2002%2F16%2C%2021%3A30%20UTC.%20Our%20logs%20show%20the%20incident%20started%20on%2002%2F16%2C%2020%3A17%20UTC%20and%20that%20during%20the%201%20hour%20and%2013%20minutes%20that%20it%20took%20to%20resolve%20the%20issue%20customers%20experienced%26nbsp%3B%3CSPAN%20style%3D%22color%3A%20rgb(51%2C%2051%2C%2051)%3B%20font-family%3A%20SegoeUI%2C%20Lato%2C%20%26quot%3BHelvetica%20Neue%26quot%3B%2C%20Helvetica%2C%20Arial%2C%20sans-serif%3B%22%3Ein%20the%20West%20US%202%20Region%20with%20workspace-enabled%20Application%20Insights%20resources%20experienced%20intermittent%20data%20gaps%20as%20well%20as%20possible%20misfiring%20of%20alerts%20based%20on%20resulting%20data%20gaps%20or%20latencies.%3C%2FSPAN%3E%3C%2FDIV%3E%3CDIV%20style%3D%22font-size%3A14px%3B%22%3E%3CUL%3E%3CLI%3E%3CU%3ERoot%20Cause%3C%2FU%3E%3A%20The%20failure%20was%20due%20to%20an%20ingestion%20backend%20resource%20that%20was%20in%20a%20bad%20state%20due%20to%20cached%20data.%3C%2FLI%3E%3CLI%3E%3CU%3EIncident%20Timeline%3C%2FU%3E%3A%201%20Hours%20%26amp%3B%2013%20minutes%20-%2002%2F16%2C%2020%3A17%26nbsp%3BUTC%20through%2002%2F16%2C%2021%3A30%26nbsp%3BUTC%3C%2FLI%3E%3C%2FUL%3EWe%20understand%20that%20customers%20rely%20on%20Application%20Insights%20as%20a%20critical%20service%20and%20apologize%20for%20any%20impact%20this%20incident%20caused.%3CBR%20%2F%3E%3CBR%20%2F%3E-Jeff%3CBR%20%2F%3E%3C%2FDIV%3E%3CHR%20style%3D%22border-top-color%3Alightgray%22%20%2F%3E%3CDIV%20style%3D%22font-size%3A14px%3B%22%3E%3CDIV%20style%3D%22font-size%3A14px%3B%22%3E%3CU%3EInitial%20Update%3C%2FU%3E%3A%20Tuesday%2C%2016%20February%202021%2021%3A22%20UTC%3CBR%20%2F%3E%3CBR%20%2F%3EWe%20are%20aware%20of%20issues%20within%20Application%20Insights%20and%20are%20actively%20investigating.%20Some%20customers%20in%20West%20US%202%20may%20experience%20delayed%20or%20missed%20Log%20Search%20Alerts%20and%20Data%20Gaps.%3CBR%20%2F%3E%3CUL%3E%3CLI%3E%3CU%3EWork%20Around%3C%2FU%3E%3A%20None%3C%2FLI%3E%3CLI%3E%3CU%3ENext%20Update%3C%2FU%3E%3A%20Before%2002%2F16%2022%3A30%20UTC%3C%2FLI%3E%3C%2FUL%3EWe%20are%20working%20hard%20to%20resolve%20this%20issue%20and%20apologize%20for%20any%20inconvenience.%3CBR%20%2F%3E-Jeff%3C%2FDIV%3E%3CHR%20style%3D%22border-top-color%3Alightgray%22%20%2F%3E%3C%2FDIV%3E%3C%2FDIV%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-2140597%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EApplication%20Insights%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E
Final Update: Tuesday, 16 February 2021 21:34 UTC

We've confirmed that all systems are back to normal with no customer impact as of 02/16, 21:30 UTC. Our logs show the incident started on 02/16, 20:17 UTC and that during the 1 hour and 13 minutes that it took to resolve the issue customers experienced in the West US 2 Region with workspace-enabled Application Insights resources experienced intermittent data gaps as well as possible misfiring of alerts based on resulting data gaps or latencies.
  • Root Cause: The failure was due to an ingestion backend resource that was in a bad state due to cached data.
  • Incident Timeline: 1 Hours & 13 minutes - 02/16, 20:17 UTC through 02/16, 21:30 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.

-Jeff

Initial Update: Tuesday, 16 February 2021 21:22 UTC

We are aware of issues within Application Insights and are actively investigating. Some customers in West US 2 may experience delayed or missed Log Search Alerts and Data Gaps.
  • Work Around: None
  • Next Update: Before 02/16 22:30 UTC
We are working hard to resolve this issue and apologize for any inconvenience.
-Jeff