Final Update: Tuesday, 03 December 2019 22:48 UTC
We've confirmed that all systems are back to normal and the customers using .NET Core web applications monitored with Application Insights hosted in App Services no longer experience exceptions.
- The fix was rolled out across all regions.
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.
-Saika
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Update: Tuesday, 12 November 2019 20:50 UTC
Customers using .NET Core web applications monitored with Application Insights hosted in App Services in rare cases might experience crashes with following exception:
"System.IO.FileNotFoundException: Could not load file or assembly 'System.Diagnostics.DiagnosticSource, Version=4.0.4.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified."
Such exception can happen when .NET Core web application has a dependency on 'System.Diagnostics.DiagnosticSource%u2019 binary and has this binary file deployed to %u2018wwwroot%u2019 folder, which is rare.
We are aware of the issue and are rolling out the fix across different regions.
- Work Around: Please set previous version of monitoring extension by changing this app setting if you experience the above issue: ApplicationInsightsAgent_EXTENSIONVERSION=2.8.24
-Venkat
Updated Dec 03, 2019
Version 4.0