I can't Join a server in 1.7.9, It sucks!

Put the summary of the bug you're having here
Everytime i try to run a server in 1.7x, it crashes
What I expected to happen was...:
Describe what you thought should happen here
It would load the server..

What actually happened was...:
Describe what happened here
It Crashed on me.

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...