Error "The connection to adb is down, and a severe error has occurred."

Try the below steps:

  1. Close Eclipse if running
  2. Go to the Android SDK platform-tools directory in the command prompt
  3. Type adb kill-server (Eclipse should be closed before issuing these commands)
  4. Then type adb start-server
  5. No error message is thrown while starting the ADB server, then ADB is started successfully.
  6. Now you can start Eclipse again.

It worked for me this way.

Restart your phone as well!


Use:

Open Task Manager → Processes → adb.exe → End Process → restart Eclipse

This worked for me.

And:

Open Task Manager → Processes → eclipse.exe → End Process → restart Eclipse