"Error connecting to the service protocol: failed to connect to http://..." after running adb reverse command

Question

I have a flutter app that I debug on real device, and it runs fine in the debug mode.

I got to a point when I created a backend server that runs in a localhost:8080 only machine, so in order to make it accessible from my real phone device also, I ran:

adb reverse tcp:8080 tcp:8080

and it worked exactly as I expected where the app was running.

But, after this, if I re-rerun the app again in the real device ( unplug and plug again the USB in the machine ), it got to the point of showing the √ Built build\app\outputs\flutter-apk\app-debug.apk. and this error got thrown and it terminate/close the debug process of the app :

Error connecting to the service protocol: failed to connect to http://127.0.0.1:61410/DHX5GEb2kn4=/

I did try to kill the adb.exe command with:

adb kill-server

supposing that this will undo the adb reverse command but the same error gets thrown

well, I found a painful fix, which is restarting the device, but this takes much time and is painful.

I want to know what should I turn on/off while debugging my flutter app

Answer 1

I finally managed to fic the issue, and get my app debugging properly again.

What I did wrong ?

When I needed the adb, I thought it's not installed on my laptop since when I runned adb command in command line tool (cmd), it tells me that it's not recognized, so the smart me did downloaded the android platforms-tools separatly from Here , and I runned the :

adb reverse tcp:8080 tcp:8080

from it's folder, which runned, and I thought I solved the issue, but what I just learned is that the Dart VM server uses an internal installed another adb.exe which have a different version (39) that what I run the command with (41).

so when I re-debug the flutter project, the error happens.

How did I fix it?

1. I did simply searched for the internal adb.exe, you can find in the Android folder, ...\Android\SDK\platforms\tools\adb.exe.

2. I Paste the new adb.exe with the height version inside the folder.

3. Run the command from that folder

For 3., you can set the path of that folder in the PATH in environment variables, so you can run the adb commands from anywhere.