ADB, Android Debug Bridge, is a command-line utility included with Google’s Android SDK. ADB can control your device over USB from a computer, copy files back and forth, install and uninstall apps, run shell commands, and more.
1.0.29 will not rspond for JB 4.2.X
Google just added this in the ADB protocol last November, so you need the NEWEST ADB: https://github.com/android/platform_system_core/commit/d5fcafaf41f8ec90986c813f75ec78402096af2d
4.2.2 now enforces RSA authentication via ADB. This is only supported in later versions of ADB.
download the updated one here
then replace old adb with the updated one