Log

[17:49:42] [Server thread/INFO]: Starting minecraft server version 1.7.10
[17:51:40] [Server thread/INFO]: Loading properties
[17:51:40] [Server thread/INFO]: Default game type: SURVIVAL
[17:51:40] [Server thread/INFO]: Generating keypair
[17:51:40] [Server thread/INFO]: Starting Minecraft server on 31.214.195.176:25565
[17:52:56] [Server thread/INFO]: Preparing level "world"
[17:53:05] [Server thread/INFO]: Preparing start region for level 0
[17:53:06] [Server thread/INFO]: Preparing spawn area: 55%
[17:53:06] [Server thread/INFO]: Done (11.044s)! For help, type "help" or "?"
[17:53:06] [Server thread/INFO]: Starting GS4 status listener
[17:53:06] [Query Listener #1/INFO]: Query running on 31.214.195.176:25565
[17:53:12] [Server thread/ERROR]: Encountered an unexpected exception
java.lang.NoSuchMethodError: java.util.concurrent.ConcurrentHashMap.keySet()Ljava/util/concurrent/ConcurrentHashMap$KeySetView;
	at blusunrize.immersiveengineering.common.EventHandler.onWorldTick(EventHandler.java:259) ~[EventHandler.class:?]
	at cpw.mods.fml.common.eventhandler.ASMEventHandler_665_EventHandler_onWorldTick_WorldTickEvent.invoke(.dynamic) ~[?:?]
	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54) ~[ASMEventHandler.class:?]
	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140) ~[EventBus.class:?]
	at cpw.mods.fml.common.FMLCommonHandler.onPostWorldTick(FMLCommonHandler.java:255) ~[FMLCommonHandler.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:645) ~[MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:334) ~[lt.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547) ~[MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [li.class:?]
[17:53:12] [Server thread/ERROR]: This crash report has been saved to: /games/ni556263_1/ftproot/minecraftftb/./crash-reports/crash-2016-03-13_17.53.12-server.txt
[17:53:12] [Server thread/INFO]: Stopping server
[17:53:12] [Server thread/INFO]: Saving players
[17:53:12] [Server thread/INFO]: Saving worlds
[17:53:12] [Server thread/INFO]: Saving chunks for level 'world'/Overworld
[17:53:13] [Server thread/INFO]: Saving chunks for level 'world'/Nether
[17:53:13] [Server thread/INFO]: Saving chunks for level 'world'/The End
[17:53:13] [Server thread/INFO]: Saving chunks for level 'world'/Twilight Forest
[17:53:13] [Server thread/INFO]: Saving chunks for level 'world'/Underdark
[17:53:13] [Server thread/INFO]: Saving chunks for level 'world'/Dungeon
[17:53:13] [Server thread/INFO]: Saving chunks for level 'world'/Spirit World
[17:53:13] [Server thread/INFO]: Saving chunks for level 'world'/Torment
[17:53:13] [Server thread/INFO]: Saving chunks for level 'world'/Mirror
[17:53:13] [Server thread/INFO]: Saving chunks for level 'world'/Bedrock
[17:53:13] [Server thread/INFO]: Saving chunks for level 'world'/The Outer Lands
[17:53:13] [Server thread/INFO]: Saving chunks for level 'world'/The Last Millenium