1.8 server crashing, skipping ticks

[16:11:55] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 3684ms behind, skipping 73 tick(s)
[16:12:39] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 28018ms behind, skipping 560 tick(s)
[16:12:42] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2414ms behind, skipping 48 tick(s)
[16:13:13] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 6029ms behind, skipping 120 tick(s)

SOLUTION: Add nogui pause to your start command line like this:

java -Xms1024M -Xmx2048M -jar minecraft_server.jar nogui
pause