adb server version doesn't match this client

Question

Whenever I try to run adb devices:

            $ adb devices
            * daemon not running. starting it now *
            * daemon started su         


        

Answer 1

In my machine (Ubuntu 14.04 and Genymotion 2.5.2) the source of the problem was that, I had 2 adb files of different versions.

(Before, narrowing down this problem source, I already had Genymotion's Settings > "Use custom Android SDK tools" referring to my machine's installed Android SDK directory as advised by Aditya Kresna Permana. I also tried with killing and starting the adb server and few other solutions from around the web).

Then saw, that running adb versionfrom my Android SDK installation directory “~/Android/Sdk/platform-tools” produced - "Android Debug Bridge version 1.0.32"

But, adb version command from “/usr/bin” directory produced- “Android Debug Bridge version 1.0.31"

So just followed - http://bernaerts.dyndns.org/linux/74-ubuntu/328-ubuntu-trusty-android-adb-fastboot-qtadb to update the adb in “/usr/bin”

# adb version
Android Debug Bridge version 1.0.31
# wget -O - https://skia.googlesource.com/skia/+archive/cd048d18e0b81338c1a04b9749a00444597df394/platform_tools/android/bin/linux.tar.gz | tar -zxvf - adb
# sudo mv adb /usr/bin/adb
# sudo chmod +x /usr/bin/adb
# adb version
Android Debug Bridge version 1.0.32

And now running adb devices works perfectly as expected.

And it also solved the associated problem that, before my PhoneGap (Cordova) app was not getting integrated with the Genymotion's virtual device. Now obviously that problem solved as well.