[09:46:55] [main/INFO]: Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', servicesHost='https://api.minecraftservices.com', name='PROD'
[09:46:56] [main/INFO]: Reloading ResourceManager: Default, bukkit
[09:46:57] [Worker-Main-10/INFO]: Loaded 7 recipes
[09:46:59] [Server thread/INFO]: Starting minecraft server version 1.17
[09:46:59] [Server thread/INFO]: Loading properties
[09:46:59] [Server thread/INFO]: This server is running CraftBukkit version 3101-Spigot-c9cea60-5182f92 (MC: 1.17) (Implementing API version 1.17-R0.1-SNAPSHOT)
[09:46:59] [Server thread/INFO]: Debug logging is disabled
[09:46:59] [Server thread/INFO]: Server Ping Player Sample Count: 12
[09:46:59] [Server thread/INFO]: Using 4 threads for Netty based IO
[09:47:00] [Server thread/INFO]: Default game type: SURVIVAL
[09:47:00] [Server thread/INFO]: Generating keypair
[09:47:00] [Server thread/INFO]: Starting Minecraft server on 127.0.0.1:25553
[09:47:00] [Server thread/INFO]: Using epoll channel type
[09:47:00] [Server thread/WARN]: **** SERVER IS RUNNING IN OFFLINE/INSECURE MODE!
[09:47:00] [Server thread/WARN]: The server will make no attempt to authenticate usernames. Beware.
[09:47:00] [Server thread/WARN]: Whilst this makes it possible to use BungeeCord, unless access to your server is properly restricted, it also opens up the ability for hackers to connect with any username they choose.
[09:47:00] [Server thread/WARN]: Please see http://www.spigotmc.org/wiki/firewall-guide/ for further information.
[09:47:00] [Server thread/WARN]: To change this, set "online-mode" to "true" in the server.properties file.
[09:47:00] [Server thread/INFO]: Preparing level "world"
[09:47:00] [Server thread/INFO]: Forcing world upgrade! world
[09:47:00] [Server thread/INFO]: Counting chunks...
[09:47:01] [Server thread/INFO]: Upgrading all chunks...
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[09:47:31] [pool-4-thread-1/INFO]: World optimizaton finished after 30290 ms
[09:47:31] [Server thread/INFO]: Forcing world upgrade! world_nether
[09:47:31] [Server thread/INFO]: Counting chunks...
[09:47:32] [Server thread/INFO]: Upgrading all chunks...
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[09:49:13] [pool-4-thread-2/INFO]: World optimizaton finished after 101156 ms
[09:49:13] [Server thread/ERROR]: Encountered an unexpected exception
java.lang.NullPointerException: Cannot invoke "net.minecraft.world.level.levelgen.GeneratorSettings.d()" because the return value of "net.minecraft.world.level.storage.WorldDataServer.getGeneratorSettings()" is null
	at net.minecraft.server.MinecraftServer.loadWorld(MinecraftServer.java:550) ~[spigot.jar:3101-Spigot-c9cea60-5182f92]
	at net.minecraft.server.dedicated.DedicatedServer.init(DedicatedServer.java:264) ~[spigot.jar:3101-Spigot-c9cea60-5182f92]
	at net.minecraft.server.MinecraftServer.x(MinecraftServer.java:986) ~[spigot.jar:3101-Spigot-c9cea60-5182f92]
	at net.minecraft.server.MinecraftServer.lambda$0(MinecraftServer.java:307) ~[spigot.jar:3101-Spigot-c9cea60-5182f92]
	at java.lang.Thread.run(Thread.java:831) [?:?]
[09:49:14] [Server thread/ERROR]: This crash report has been saved to: /home/survivalUPGRADE/./crash-reports/crash-2021-06-11_09.49.14-server.txt
[09:49:14] [Server thread/INFO]: Stopping server
[09:49:14] [Server thread/INFO]: Saving players
[09:49:14] [Server thread/INFO]: Saving worlds
[09:49:14] [Server thread/INFO]: Saving chunks for level 'ServerLevel[world]'/minecraft:overworld
[09:49:14] [Server thread/INFO]: ThreadedAnvilChunkStorage (world): All chunks are saved
[09:49:14] [Server thread/INFO]: Saving chunks for level 'ServerLevel[world_nether]'/minecraft:the_nether
[09:49:14] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[09:49:14] [Server thread/INFO]: ThreadedAnvilChunkStorage (world): All chunks are saved
[09:49:14] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved