How to fix the error “Unable to open debugger port

Question

Error running Android Debugger (8600):
    Unable to open debugger port (localhost:8600):
    java.net.SocketException "Connection reset"

Answer 1

If none of solutions didn't workded, just restart your computer.

Answer 2

It could be that you need to wait for your code to stop compiling before you attached the debugger. I had a similar error and all I needed was patience.

Answer 3

I tried other answers (e.g. restarting Android Studio) but they didn't solve this for me.

I had accidentally selected MTP (Media Transfer Protocol) in my Developer Options/USB Configuration. It started working once I set it to PTP (Picture Transfer Protocol).

EDIT: On reflection it's probably just that I changed the protocol because I've had the same issue since while on PTP. Hence I'm suggesting that the real answer is to change the protocol on the phone and, if you might need it, don't forget to change it back.

Answer 4

In my case, there was another service running on my laptop(Windows) that was using the port 8600. I opened Task Manager and stopped the service. Now, I could debug my application normally without the above error.

Answer 5

I was able to fix this with these commands:

• adb kill-server
• adb start-server

Answer 6

Try Restarting ANDROID STUDIO (Worked for me)