When exit to the once map, minecraft crash

[23:12:15] [Client thread/INFO]: Setting user: Alanocho_x
[23:12:15] [Client thread/INFO]: (Session ID is token:e30bde2c822041bca3a57800398aa0d9:845965a7a31e45a099a77a5c2cc56483)
[23:12:16] [Client thread/INFO]: LWJGL Version: 2.9.1
[23:12:16] [Client thread/INFO]: Reloading ResourceManager: Default
[23:12:17] [Sound Library Loader/INFO]: Starting up SoundSystem...
[23:12:17] [Client thread/WARN]: File minecraft:sounds/mob/ghast/fireball.ogg does not exist, cannot add it to event minecraft:item.fireCharge.use
[23:12:17] [Thread-6/INFO]: Initializing LWJGL OpenAL
[23:12:17] [Thread-6/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[23:12:17] [Thread-6/INFO]: OpenAL initialized.
[23:12:17] [Sound Library Loader/INFO]: Sound engine started
[23:12:19] [Client thread/INFO]: Created: 512x512 textures-atlas
[23:12:34] [Client thread/INFO]: Connecting to 25.191.29.6, 25565
[23:12:35] Server Connector #1/ERROR: Couldn't connect to server
java.net.ConnectException: Connection refused: no further information: /25.191.29.6:25565
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[?:1.7.0_55]
at sun.nio.ch.SocketChannelImpl.finishConnect(Unknown Source) ~[?:1.7.0_55]
at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:191) ~[netty-all-4.0.15.Final.jar:4.0.15.Final]
at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:255) ~[netty-all-4.0.15.Final.jar:4.0.15.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:502) ~[netty-all-4.0.15.Final.jar:4.0.15.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:452) ~[netty-all-4.0.15.Final.jar:4.0.15.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:346) ~[netty-all-4.0.15.Final.jar:4.0.15.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101) ~[netty-all-4.0.15.Final.jar:4.0.15.Final]
at java.lang.Thread.run(Unknown Source) ~[?:1.7.0_55]
[23:12:41] [Client thread/INFO]: Connecting to 25.191.29.6, 25565
[23:12:42] Server Connector #2/ERROR: Couldn't connect to server
java.net.ConnectException: Connection refused: no further information: /25.191.29.6:25565
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[?:1.7.0_55]
at sun.nio.ch.SocketChannelImpl.finishConnect(Unknown Source) ~[?:1.7.0_55]
at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:191) ~[netty-all-4.0.15.Final.jar:4.0.15.Final]
at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:255) ~[netty-all-4.0.15.Final.jar:4.0.15.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:502) ~[netty-all-4.0.15.Final.jar:4.0.15.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:452) ~[netty-all-4.0.15.Final.jar:4.0.15.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:346) ~[netty-all-4.0.15.Final.jar:4.0.15.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101) ~[netty-all-4.0.15.Final.jar:4.0.15.Final]
at java.lang.Thread.run(Unknown Source) ~[?:1.7.0_55]
[23:13:03] [Server thread/INFO]: Starting integrated minecraft server version 14w33c
[23:13:03] [Server thread/INFO]: Generating keypair
[23:13:03] [Server thread/INFO]: Preparing start region for level 0
[23:13:04] [Server thread/INFO]: Changing view distance to 16, from 10
[23:13:04] [Server thread/INFO]: Alanocho_x[local:E:754fa7ae] logged in with entity id 367 at (219.30000001192093, 74.0, 223.6470952746137)
[23:13:04] [Server thread/INFO]: Alanocho_x se metió en el juego
[23:13:06] [Server thread/INFO]: Saving and pausing game...
[23:13:06] [Server thread/INFO]: Saving chunks for level 'Prophecy & AlanochoX'/Overworld
[23:13:07] [Server thread/INFO]: Saving chunks for level 'Prophecy & AlanochoX'/Nether
[23:13:07] [Server thread/INFO]: Saving chunks for level 'Prophecy & AlanochoX'/The End
[23:13:09] [Client thread/INFO]: Started on 54039
[23:13:09] [Client thread/INFO]: [CHAT] Juego local hosteado en el puerto 54039
[23:13:38] [Chunk Batcher 0/WARN]: Needed to grow BufferBuilder buffer: Old size 524288 bytes, new size 2621440 bytes.
[23:13:39] [Chunk Batcher 1/WARN]: Needed to grow BufferBuilder buffer: Old size 524288 bytes, new size 2621440 bytes.
[23:13:40] [Chunk Batcher 0/WARN]: Needed to grow BufferBuilder buffer: Old size 524288 bytes, new size 2621440 bytes.
[23:13:50] [Server thread/INFO]: com.mojang.authlib.GameProfile@671f64be[id=<null>,name=ProphesyGMR,properties={},legacy=false] (/25.198.183.120:35959) lost connection: Disconnected
[23:13:56] [Server thread/INFO]: com.mojang.authlib.GameProfile@537c7528[id=<null>,name=ProphesyGMR,properties={},legacy=false] (/25.198.183.120:35961) lost connection: Disconnected
[23:16:01] [Server thread/INFO]: Alanocho_x lost connection: TextComponent{text='Disconnected', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null, insertion=null}}
[23:16:01] [Server thread/INFO]: Alanocho_x se fue del juego
[23:16:01] [Server thread/INFO]: Stopping singleplayer server as player logged out
[23:16:01] [Server thread/INFO]: Stopping server
[23:16:01] [Server thread/INFO]: Saving players
[23:16:01] [Server thread/INFO]: Saving worlds
[23:16:01] [Server thread/INFO]: Saving chunks for level 'Prophecy & AlanochoX'/Overworld
[23:16:02] [Server thread/INFO]: Saving chunks for level 'Prophecy & AlanochoX'/Nether
[23:16:02] [Server thread/INFO]: Saving chunks for level 'Prophecy & AlanochoX'/The End