Recently when I was debugging on a Android test application I encountered a crash/exception and in a hurry to fix the issue, I closed the emulator mid way and after a while started working on a different project. The new project didn’t had any errors for sure but the console was reporting via DDMS “Sending jdwp tracking request failed!”.
Sending jdwp tracking request failed
After googling for a while I found the fix that you just need to restart your eclipse. Also sometimes a clean project works.