I'm currently experiencing a few issues using ADB with Debian Stretch. Whenever I issue an ADB command, I get the following message:
$ adb root
adb server version (39) doesn't match this client (36); killing...
* daemon started successfully *
Normally this doesn't cause any issues other than a 2 second delay while the ADB server restarts, but when I'm using adb shell
the connection will occasionally drop, which is annoying. Note that this is different to other questions such as this one as the server version is greater than the client version.