lighting bug

[15:24:24] [Server thread/INFO]: Starting minecraft server version 1.11.2
[15:24:32] [Server thread/INFO]:                __        __   ___  __         __
[15:24:32] [Server thread/INFO]:     |    |  | /  ` |__/ |__) |__  |__)  |\/| /__`
[15:24:32] [Server thread/INFO]:     |___ \__/ \__, |  \ |    |___ |  \  |  | .__/
[15:24:32] [Server thread/INFO]:
[15:24:32] [Server thread/INFO]:   Loading version v3.0.68 on Sponge - SpongeForge
[15:24:32] [Server thread/INFO]:   Running on server version SpongeAPI: 6.0.0-SNAPSHOT-403a0d8 - SpongeForge: 1.11.2-2227-6.0.0-BETA-2260
[15:24:32] [Server thread/INFO]:
[15:24:32] [Server thread/INFO]: [LP] Loading configuration...
[15:24:33] [Server thread/INFO]: [LP] Detecting storage method...
[15:24:33] [Server thread/INFO]: [LP] Loading dependencies...
[15:24:33] [Server thread/INFO]: [LP] Identified the following dependencies: [MYSQL_DRIVER, SLF4J_API, SLF4J_SIMPLE, HIKARI]
[15:24:33] [Server thread/INFO]: [LP] Initializing storage backings...
[15:24:33] [Server thread/INFO]: [LP] Initialising storage provider...
[15:24:33] [Server thread/INFO]: [LP] Registering commands...
[15:24:34] [Server thread/INFO]: [LP] Loading internal permission managers...
[15:24:34] [Server thread/INFO]: [LP] Registering PermissionService...
[15:24:34] [Server thread/INFO]: [LP] Registering API...
[15:24:34] [Server thread/INFO]: [LP] Successfully loaded.
[15:24:35] [Server thread/INFO]: [UC] Module blood was not registered because it is disabled in the modules.conf.
[15:24:35] [Server thread/INFO]: [UC] Registered module: world
[15:24:35] [Server thread/INFO]: [UC] Registered module: mail
[15:24:35] [Server thread/INFO]: [UC] Registered module: jail
[15:24:35] [Server thread/INFO]: [UC] Registered module: geoip
[15:24:35] [Server thread/INFO]: [UC] Registered module: unknowncommand
[15:24:35] [Server thread/INFO]: [UC] Registered module: spy
[15:24:35] [Server thread/INFO]: [UC] Registered module: deaf
[15:24:35] [Server thread/INFO]: [UC] Registered module: ban
[15:24:35] [Server thread/INFO]: [UC] Registered module: kick
[15:24:35] [Server thread/INFO]: [UC] Registered module: automessage
[15:24:35] [Server thread/INFO]: [UC] Registered module: time
[15:24:35] [Server thread/INFO]: [UC] Registered module: blockinfo
[15:24:35] [Server thread/INFO]: [UC] Registered module: home
[15:24:35] [Server thread/INFO]: [UC] Registered module: fly
[15:24:35] [Server thread/INFO]: [UC] Registered module: sign
[15:24:35] [Server thread/INFO]: [UC] Registered module: inventory
[15:24:35] [Server thread/INFO]: [UC] Registered module: personalmessage
[15:24:35] [Server thread/INFO]: [UC] Registered module: warp
[15:24:35] [Server thread/INFO]: [UC] Registered module: god
[15:24:35] [Server thread/INFO]: [UC] Registered module: commandtimer
[15:24:35] [Server thread/INFO]: [UC] Registered module: back
[15:24:35] [Server thread/INFO]: [UC] Module poke was not registered because it is disabled in the modules.conf.
[15:24:35] [Server thread/INFO]: [UC] Registered module: broadcast
[15:24:35] [Server thread/INFO]: [UC] Registered module: mute
[15:24:35] [Server thread/INFO]: [UC] Registered module: burn
[15:24:35] [Server thread/INFO]: [UC] Registered module: nick
[15:24:35] [Server thread/INFO]: [UC] Registered module: vanish
[15:24:35] [Server thread/INFO]: [UC] Registered module: food
[15:24:35] [Server thread/INFO]: [UC] Registered module: gamemode
[15:24:35] [Server thread/INFO]: [UC] Registered module: weather
[15:24:35] [Server thread/INFO]: [UC] Registered module: afk
[15:24:35] [Server thread/INFO]: [UC] Registered module: kit
[15:24:35] [Server thread/INFO]: [UC] Registered module: teleport
[15:24:35] [Server thread/INFO]: [UC] Registered module: random
[15:24:35] [Server thread/INFO]: [UC] Registered module: item
[15:24:35] [Server thread/INFO]: [UC] Registered module: connectionmessages
[15:24:35] [Server thread/INFO]: [UC] Module serverlist was not registered because it is disabled in the modules.conf.
[15:24:35] [Server thread/INFO]: [UC] Registered module: spawn
[15:24:35] [Server thread/INFO]: [UC] Module tablist was not registered because it is disabled in the modules.conf.
[15:24:35] [Server thread/INFO]: [UC] Registered module: playerinfo
[15:24:35] [Server thread/INFO]: [UC] Registered module: chat
[15:24:35] [Server thread/INFO]: [UC] Registered module: heal
[15:24:35] [Server thread/INFO]: [UC] Registered module: votifier
[15:24:35] [Server thread/INFO]: [UC] Registered module: blacklist
[15:24:35] [Server thread/INFO]: [UC] Registered module: sudo
[15:24:35] [Server thread/INFO]: [UC] Registered module: core
[15:24:35] [Server thread/INFO]: [UC] Registered module: deathmessage
[15:24:35] [Server thread/INFO]: [UC] Pre-initialized UltimateCore! (954 ms)
[15:24:35] [Server thread/INFO]: Loading properties
[15:24:35] [Server thread/INFO]: Default game type: SURVIVAL
[15:24:35] [Server thread/INFO]: Generating keypair
[15:24:35] [Server thread/INFO]: Starting Minecraft server on *:25565
[15:24:35] [Server thread/INFO]: Using epoll channel type
[15:24:36] [Server thread/INFO]: [UC] Initialized UltimateCore! (824 ms)
[15:24:38] [Server thread/INFO]: [UC] Post-initialized UltimateCore! (17 ms)
[15:24:39] [Server thread/INFO]: Preparing level "world"
[15:24:41] [Server thread/INFO]: Preparing start region for level 0 (world)
[15:24:44] [Server thread/INFO]: Preparing spawn area: 0%
[15:24:45] [Server thread/INFO]: Preparing spawn area: 37%
[15:24:46] [Server thread/INFO]: Preparing spawn area: 79%
[15:24:46] [Server thread/INFO]: Preparing start region for level 2 (Tempworld)
[15:24:47] [Server thread/INFO]: Preparing spawn area: 43%
[15:24:48] [Server thread/INFO]: Preparing start region for level 3 (test)
[15:24:49] [Server thread/INFO]: Preparing spawn area: 30%
[15:24:50] [Server thread/INFO]: Preparing spawn area: 95%
[15:24:50] [Server thread/INFO]: Preparing start region for level 0 (world)
[15:24:50] [Server thread/INFO]: Preparing start region for level 2 (Tempworld)
[15:24:50] [Server thread/INFO]: Preparing start region for level 3 (test)
[15:24:50] [Server thread/INFO]: Done (12.508s)! For help, type "help" or "?"
[15:24:58] [User Authenticator #1/INFO]: UUID of player t2wave is 70233cd5-a94d-4eba-8a85-9844b34bbfe2
[15:24:58] [Server thread/INFO]: t2wave[/73.6.131.236:49845] logged in with entity id 706 in world(0) at (-233.17666465129716, 74.1064092850664, -769.9742941175398)
[15:24:58] [Server thread/INFO]: t2wave joined the game
[15:25:03] [User Authenticator #2/INFO]: UUID of player KittyCake2 is f8b9827c-8606-4282-9cb4-382ee134b864
[15:25:03] [Server thread/INFO]: KittyCake2[/98.195.204.184:51217] logged in with entity id 1206 in world(0) at (-2071.1887314487526, 182.0, 1824.3439016228829)
[15:25:03] [Server thread/INFO]: KittyCake2 joined the game
[15:25:04] [Server thread/INFO]: com.mojang.authlib.GameProfile@2a423dcd[id=<null>,name=JuniorBullets,properties={},legacy=false] (/98.198.95.213:64920) lost connection: Disconnected
[15:25:31] [User Authenticator #3/INFO]: UUID of player JuniorBullets is b0c0e472-d973-478a-9151-ff26f7c116c9
[15:25:31] [Server thread/INFO]: JuniorBullets[/98.198.95.213:64995] logged in with entity id 4478 in world(0) at (-225.5, 63.0, -780.5)
[15:25:31] [Server thread/INFO]: JuniorBullets joined the game
[15:30:57] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 8496ms behind, skipping 169 tick(s)
[15:31:14] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 9459ms behind, skipping 189 tick(s)
[15:31:28] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2876ms behind, skipping 57 tick(s)
[15:33:05] [Server thread/INFO]: Only players can use this command.
[15:33:12] [Server Watchdog/FATAL]: A single server tick took 66.69 seconds (should be max 0.05)
[15:33:12] [Server Watchdog/FATAL]: Considering it to be crashed, server will forcibly shutdown.
[15:33:14] [Server Watchdog/ERROR]: This crash report has been saved to: /home2/dc/sponge/./crash-reports/crash-2017-04-01_15.33.14-server.txt