Splunk AppDynamics Python Agent Warning

Osama_Abbas1 — Tue, 14 Oct 2025 20:40:03 GMT

Hi,

I am using AppD SaaS to monitor an in-house Python-based web application (Flask-based). I have successfully deployed the Python app agent and added the config to supervisor and can get the metrics to the controller properly. However, I get this in the supervisor error log file:

...<output_truncated> Cannot fetch aiohttp framework version Cannot fetch aiohttp framework version WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.singularity.ee.util.memory.calc.FieldCache (file:/path/to/.venv/lib/python3.12/site-packages/appdynamics_bindeps/proxy/lib/appagent-boot.jar) to field java.util.Hashtable.table WARNING: Please consider reporting this to the maintainers of com.singularity.ee.util.memory.calc.FieldCache WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Cannot fetch aiohttp framework version Cannot fetch aiohttp framework version ...<output_truncated>

Don't know what should be done in such case.

Thanks to help.

Re: Splunk AppDynamics Python Agent Warning

PrewinThomas — Wed, 15 Oct 2025 06:15:49 GMT

@Osama_Abbas1

As long as you see Flask metrics in the Controller, i think you can ignore this warnings.
Warning highlights the agent tries to detect if your app is running on aiohttp, Since you’re using Flask, it just log the warning.

Regards,
Prewin
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Splunk AppDynamics Python Agent Warning

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