Shortcuts not working in Eclipse Neon

I'm using Neon.1a Release (4.6.1), I too have experienced the problem of Ctrl + o (to list the members )and Ctrl + d (to delete a line of code) not working, I tried closing and starting the eclipse but that didn't help. I've noticed an option named 'Restart' in the File menu. Choosing the option restarted the eclipse and the shortcuts involving Ctrl key started working as before.

Closing and opening the project fixed it.

After the solutions presented here and the other similar questions don't work for me, i removed the .metadata and .recommenders file in the Eclipse Workspace and restart the Eclipse, i am able to use my shortcuts again.

Please note that if you remove these files, you will lose your customized shortcuts and some other configurations as well. It means be careful when you are applying my solution.

The easiest solution for me was to Restore Defaults in Preferences - General - Keys.

If you assigned some custom bindings it is possible that something went awry.