Appium Inspector Fails to Connect to Flutter App Due to Dynamically Changing Dart Observatory URL

[sai9133]

I'm using Appium Inspector to automate testing of a Flutter app on an Android emulator. However, I keep encountering an issue where the Dart Observatory URL dynamically changes each time I launch the app, causing the session to fail with the following error:

Error Failed to create session. An unknown server-side error occurred while processing the command. Original error: Cannot connect to the Dart Observatory URL ws://127.0.0.1:41145/JbqYpXh-u2E=/ws. Check the server log for more details

Context: Platform: Android Emulator Appium Version: 2.11.3 Flutter Version:3.24.0

What I’ve Tried: Port Forwarding: I've manually forwarded the dynamic Dart Observatory port to a static port using:

cmd :

adb forward tcp:3000 tcp:[DYNAMIC_PORT]

This works temporarily, but since the Dart VM service port changes every time the app restarts, I have to repeat this process constantly.

Setting a Static Port: I don't have access to the source code, so I'm unable to modify the Dart VM settings to use a static port.

My Questions: ->Is there a way to stabilize the Dart Observatory port without access to the app's source code? ->Can Appium be configured to automatically detect and handle the dynamic Dart VM port? A->re there alternative approaches or tools that might handle Flutter app testing more reliably in this scenario? ->Any guidance on how to consistently connect Appium to the Dart Observatory URL or alternative solutions would be greatly appreciated!

[KazuCocoa]

Could you share the full Appium server log?

Usually this driver scans the observatory port in the settings and configures the port-forwarding internally.