adb devices return error: protocol fault (no status)

Question

My ADB stopped working recently. All commands results in error: protocol fault (no status).

Follow trace.

adb devices

system/core/adb/adb.c::main         


        

Answer 1

I had this problem on linux. I didn't realize I had an old adb on my path. Make sure that

which adb

and

which emulator

point to similar android sdk versions.