Why does our App Insights stop reporting data from the API server after about 24 hours?

Question

Currently our Application Insights environment stops recording performance metrics from our main API server after about 24 hours. Restarting the API server gets the information to start appearing again. Our open telemetry seems to be unaffected, it is just the live metrics, performance, and failures.

Answer 1

Hi @Michael DeWeese ,
Welcome to MS Q&A platform,
Hey there! There could be a few reasons why your Application Insights stops reporting data from the API server after about 24 hours. One common issue might be with the telemetry channel, which could be losing data or having interruptions. Check for any known problems in the telemetry channel that could cause this. Also, make sure the required fields are being sent correctly and aren't too large, as this can lead to data being rejected by the backend.

Another possibility is a misconfiguration in your Application Insights setup. Misconfigurations or a silently failing SDK might cause it to stop sending data. Monitoring the SDK logs can help identify if the backend is rejecting data.

Lastly, if you're using adaptive sampling, check if it's affecting the amount of telemetry being sent, especially if you're generating a large volume of data.
Let me know if you have any assistances.
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