application insights suddenly stopped recording/showing collected data

Question

application insights suddenly stopped recording/showing collected data

Janosch Lenzi 0

Since around 22 UTC on March 18, 2025, my application insights stopped displaying and/or recording data from my cloud service without me making any changes to either applications insights or the cloud service. The cloud service is working properly and the ingestion limit has not been exceeded. No operational errors or warnings are reported.

The strange thing is that "Live metrics" is connecting to the cloud service instances correctly and showing instant data.

User's image

Also, the "Performance" graph shows the request count but not the request details as you can see from the following screenshot:

User's image

Vinod Pittala 1,505 Reputation points Microsoft External Staff

2025-03-19T04:41:21.3966667+00:00
Hello Janosch Lenzi,If Application Insights is no longer displaying, yet Live Metrics and request counts are still functioning, this indicates that the telemetry is reaching Application Insights but might not be processed or stored correctly.

Please check and follow the below troubleshooting steps,

Ensure that all types of telemetry data (traces, requests, exceptions, etc.) are enabled in your configuration. Sometimes specific types of telemetry might get disabled inadvertently.

Verify that the correct instrumentation key (APPINSIGHTS_INSTRUMENTATIONKEY) or connection string is being used in your application. If this has been changed or is incorrect, data may not be sent to the correct Application Insights resource.

Ensure that your Application Insights SDK is up to date. Sometimes, issues arise from outdated SDK versions, especially after changes or updates in Azure services.

Since Live Metrics is working, it's a good indication that the connection is functional, and the issue might be more related to data processing or configuration rather than fundamental connectivity. so double-check the configuration of your Application Insights resource in the Azure Portal to ensure there are no misconfigurations

Reference doc's:

https://github.com/Microsoft/ApplicationInsights-dotnet-server/issues/894

https://techcommunity.microsoft.com/blog/azurepaasblog/troubleshoot-cloud-service-application-issue-with-application-insight-%e2%80%93-part-2-c/3508473

If the comment helpful, please click Upvote it.

Thanks
Janosch Lenzi 0 Reputation points

2025-03-19T08:46:26.4966667+00:00

Thanks for the reply, after a few hours it started working again. The interesting thing is that during the "dark" hours it continued to record data even if it did not display it. I assume it was an Azure issue.

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Your answer

Vinod Pittala 1,505 Reputation points Microsoft External Staff

2025-03-19T04:41:21.3966667+00:00

Hello Janosch Lenzi,If Application Insights is no longer displaying, yet Live Metrics and request counts are still functioning, this indicates that the telemetry is reaching Application Insights but might not be processed or stored correctly.

Please check and follow the below troubleshooting steps,

Ensure that all types of telemetry data (traces, requests, exceptions, etc.) are enabled in your configuration. Sometimes specific types of telemetry might get disabled inadvertently.

Verify that the correct instrumentation key (APPINSIGHTS_INSTRUMENTATIONKEY) or connection string is being used in your application. If this has been changed or is incorrect, data may not be sent to the correct Application Insights resource.

Ensure that your Application Insights SDK is up to date. Sometimes, issues arise from outdated SDK versions, especially after changes or updates in Azure services.

Since Live Metrics is working, it's a good indication that the connection is functional, and the issue might be more related to data processing or configuration rather than fundamental connectivity. so double-check the configuration of your Application Insights resource in the Azure Portal to ensure there are no misconfigurations

Reference doc's:

https://github.com/Microsoft/ApplicationInsights-dotnet-server/issues/894

https://techcommunity.microsoft.com/blog/azurepaasblog/troubleshoot-cloud-service-application-issue-with-application-insight-%e2%80%93-part-2-c/3508473

If the comment helpful, please click Upvote it.

Thanks
Janosch Lenzi 0 Reputation points

2025-03-19T08:46:26.4966667+00:00

Thanks for the reply, after a few hours it started working again. The interesting thing is that during the "dark" hours it continued to record data even if it did not display it. I assume it was an Azure issue.

Answer 1

Vinod Pittala 1,505 Microsoft External Staff

Hello Janosch Lenzi,

I'm glad that you were able to resolve your issue and thank you for posting your solution so that others experiencing the same thing can easily reference this!

Since the Microsoft Q&A community has a policy that "The question author cannot accept their own answer. They can only accept answers by others ", I'll repost your solution in case you'd like to "Accept " the answer.

Issue: application insights suddenly stopped recording/showing collected data.

Solution: due to ingestion issues the application insights were not displaying however, it continued to record the data. After some time you are able to see the App insights automatically.

If you have any other questions or are still running into more issues, please let me know. Thank you again for your time and patience throughout this issue.

Please remember to "Accept the answer” and “upvote it", so that others in the community facing similar issues can easily find the solution.

Thanks

Janosch Lenzi 0 Reputation points

2025-03-19T09:12:18.2766667+00:00

I confirm that it was an Azure issue:

https://app.azure.com/h/D_CP-JQ8/3d2281
Vinod Pittala 1,505 Reputation points Microsoft External Staff

2025-03-19T09:17:14.62+00:00

Thanks for the confirmation Janosch Lenzi.
Janosch Lenzi 0 Reputation points

2025-03-19T10:02:35.6266667+00:00

Interestingly, the Application Insights issue was officially opened on March 13, but yesterday when I checked before opening the ticket there was no trace of it. Maybe Microsoft was hoping that no one would notice.

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