Android Studio: java.io.IOException: An existing connection was forcibly closed by the remote host

Question

I read many posts to fix this problem. None worked for me.

Error:

Target device: lenovo-lenovo_a6000-89a70dc9 Installing APK: C:\Users\Nikhil\AndroidStudioProjects\ProfitKey\app\build\outputs\apk\app-debug.apk Uploading file to: /data/local/tmp/helix.profitkey.hotelapp java.io.IOException: An existing connection was forcibly closed by the remote host 

I tried below

1. Kill and start adb
2. Invalidate and restart android studio
3. Removed adb process in the taskbar
4. Restarted the device and pc
5. Restarted studio, clean and rebuild
6. Taskbar have only one adb.exe
7. Updated the driver from device manager

Another device it is working. But previously both device worked fine for me.

Target device: motorola-xt1022-ZX1B33PRVP Installing APK: C:\Users\Nikhil\AndroidStudioProjects\ProfitKey\app\build\outputs\apk\app-debug.apk Uploading file to: /data/local/tmp/helix.profitkey.hotelapp Installing helix.profitkey.hotelapp DEVICE SHELL COMMAND: pm install -r "/data/local/tmp/helix.profitkey.hotelapp" pkg: /data/local/tmp/helix.profitkey.hotelapp Success 

Edited:

I tried with two lenovo A6000. One is working and another is not working. Then, Moto is working and samsung galaxy is not working. Whenever I am killing and starting the adb. The task manager creating two adb first and after few seconds one was hiding. Was this a problem? But still some devices working fine.

adb starts automatically after killing by command or from the task manager if android studio is opened.

Answer 1

Now working for all the devices. Just I uninstalled the driver of mobile in PC and changed the port to connect with that device. I think some problem with the port in my PC. After long research it fixed by a small thing. It might be helpful to someone.

Answer 2

I also faced same problem,this was a just port problem,I was using computer front USB port ,just use computer back USB port and problem solved.