Miért nem tudok Minecraft bukkit szervert futtatni?

Mostmár kiírja nem ír ki annyi dolgot, de attól nem tudok csatlakozni a szerverre:Loading libraries, please wait...

[14:21:33 INFO]: Starting minecraft server version 1.8.8

[14:21:33 WARN]: To start the server with more ram, launch it as "java -Xmx1024M -Xms1024M -jar minecraft_server.jar"

[14:21:33 INFO]: Loading properties

[14:21:33 INFO]: Default game type: SURVIVAL

[14:21:33 INFO]: Generating keypair

[14:21:34 INFO]: Starting Minecraft server on *:25565

[14:21:34 INFO]: Using default channel type

[14:21:35 INFO]: This server is running CraftBukkit version git-Bukkit-07c3001 (MC: 1.8.8) (Implementing API version 1.8.8-R0.1-SNAPSHOT)

[14:21:35 INFO]: Preparing level "world"

[14:21:35 INFO]: Preparing start region for level 0 (Seed: -2173348700189693262)

[14:21:36 INFO]: Preparing spawn area: 4%

[14:21:37 INFO]: Preparing spawn area: 14%

[14:21:38 INFO]: Preparing spawn area: 27%

[14:21:39 INFO]: Preparing spawn area: 42%

[14:21:40 INFO]: Preparing spawn area: 49%

[14:21:42 INFO]: Preparing spawn area: 55%

[14:21:44 INFO]: Preparing spawn area: 60%

[14:21:45 INFO]: Preparing spawn area: 67%

[14:21:46 INFO]: Preparing spawn area: 74%

[14:21:47 INFO]: Preparing spawn area: 82%

[14:21:48 INFO]: Preparing spawn area: 90%

[14:21:49 INFO]: Preparing spawn area: 98%

[14:21:49 INFO]: Preparing start region for level 1 (Seed: -2173348700189693262)

[14:21:50 INFO]: Preparing spawn area: 5%

[14:21:52 INFO]: Preparing spawn area: 10%

[14:21:53 INFO]: Preparing spawn area: 18%

[14:21:54 INFO]: Preparing spawn area: 25%

[14:21:55 INFO]: Preparing spawn area: 32%

[14:21:56 INFO]: Preparing spawn area: 40%

[14:21:57 INFO]: Preparing spawn area: 49%

[14:21:58 INFO]: Preparing spawn area: 51%

[14:21:59 INFO]: Preparing spawn area: 56%

[14:22:00 INFO]: Preparing spawn area: 60%

[14:22:01 INFO]: Preparing spawn area: 65%

[14:22:02 INFO]: Preparing spawn area: 72%

[14:22:03 INFO]: Preparing spawn area: 80%

[14:22:04 INFO]: Preparing spawn area: 85%

[14:22:06 INFO]: Preparing spawn area: 88%

[14:22:07 INFO]: Preparing spawn area: 93%

[14:22:08 INFO]: Preparing spawn area: 98%

[14:22:08 INFO]: Preparing start region for level 2 (Seed: -2173348700189693262)

[14:22:09 INFO]: Preparing spawn area: 22%

[14:22:10 INFO]: Preparing spawn area: 39%

[14:22:11 INFO]: Preparing spawn area: 50%

[14:22:12 INFO]: Preparing spawn area: 66%

[14:22:13 INFO]: Server permissions file permissions.yml is empty, ignoring it

[14:22:13 INFO]: Done (38,407s)! For help, type "help" or "?"

[14:22:23 WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 8172ms behind, skipping 163 tick(s)