Tons Of Crashes, Questions

So Ive Got TONS AND TONS Of crashes on my server...
Im srry if this isn't a bug but this is very annoying already.
Every EVERY time i try to launch my server to play with my friends after almost 5 minutes...
guess it, Crash
it indeed Annoys My Friends Too And I Want To Play With Them Survival ):
Mojang Please Tell Me How To Fix This Its Really Annoying
Also here are some Answars If Some Of Them Correct Please Tell
I Have Not Enough Ram
My Computer Is Bad
Im Doing This For No Point.
Btw My Server Started Crashing Since 13/8/2014
I Don't Know What Happend And What Touched my Computer Until Then It Started Crashing, Please i Beg You To Tell Me How To Fix This Again Its Very Annoying.
Here's My Server Console And Crash Logs.
P.S
I Can't Wait For 1.9
Extra Info------------
Every Time It Says Missing Ticks Too Fast! Is The Server Overloaded?
Then Poof It Crashes
I Tryed Reducing The Lag But No Still Happends.