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Bug
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Resolution: Fixed
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Major
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None
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None
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This server is running CraftBukkit version git-Spigot-c574e08-d171d7e (MC: 1.15.2) (Implementing API version 1.15.2-R0.1-SNAPSHOT)
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Yes
Chunk loading of ungenerated chunks for a flat, void world is taking a huge amount of time (7 to 10 seconds) and blocks the server. This occurs with the recent 1.15.2 builds and does not occur on earlier versions. It appears to be due to the server generating hundreds of chunks as a result of trying to load just one of them.
Please see the attached test plugin and source. The output of the console is:
[19:09:55] [Server thread/INFO]: Trying to load chunk at Location{world=CraftWorld{name=test_the_end},x=102122.0,y=120.0,z=105098.0,pitch=0.0,yaw=0.0}
[19:10:04] [Server thread/INFO]: Chunk took 9040ms to load and 525 chunks were generated in the process
[19:10:04] [Server thread/INFO]: Block took 0ms to set
[19:10:04] [Server thread/INFO]: Starting
[19:10:04] [Server thread/INFO]: Trying to load chunk at Location{world=CraftWorld{name=test_the_end},x=107711.0,y=120.0,z=106458.0,pitch=0.0,yaw=0.0}
[19:10:13] [Server thread/INFO]: Chunk took 8914ms to load and 525 chunks were generated in the process
[19:10:14] [Server thread/INFO]: Block took 450ms to set
[19:10:14] [Server thread/INFO]: Starting
[19:10:14] [Server thread/INFO]: Trying to load chunk at Location{world=CraftWorld{name=test_the_end},x=108275.0,y=120.0,z=107997.0,pitch=0.0,yaw=0.0}
[19:10:22] [Server thread/INFO]: Chunk took 8341ms to load and 491 chunks were generated in the process
[19:10:22] [Server thread/INFO]: Block took 0ms to set
[19:10:22] [Server thread/INFO]: Starting
[19:10:22] [Server thread/INFO]: Trying to load chunk at Location{world=CraftWorld{name=test_the_end},x=101562.0,y=120.0,z=109116.0,pitch=0.0,yaw=0.0}
[19:10:31] [Server thread/INFO]: Chunk took 8825ms to load and 525 chunks were generated in the process
[19:10:31] [Server thread/INFO]: Block took 0ms to set
In the test plugin I picked the End world to test, but it can occur in the Nether or Overworld too.
Am I doing anything wrong in terms of generating these worlds? Do you have any idea why loading one chunk causes the server to go and generate such huge numbers of chunks? Is it looking for something?
Here's the source of the onEnable for quick reference:
@Override public void onEnable() { // Create worlds Bukkit.getLogger().info("Creating/loading worlds"); createWorlds(); Bukkit.getLogger().info("Worlds created"); Random rand = new Random(); // Wait 10 seconds so everything loads and then run every 3 seconds Bukkit.getScheduler().runTaskTimer(this, () -> { chunkCount = 0; Bukkit.getLogger().info("Starting"); World world = endWorld; // Pick a random location that probably hasn't been generated before Location loc = new Location(world, rand.nextInt(10000) + 100000, 120, rand.nextInt(10000) + 100000); long timer = System.currentTimeMillis(); Bukkit.getLogger().info("Trying to load chunk at " + loc); loc.getChunk().load(); long chunkLoadTime = System.currentTimeMillis(); Bukkit.getLogger().info("Chunk took " + (chunkLoadTime - timer) + "ms to load and " + chunkCount + " chunks were generated in the process"); loc.getBlock().setType(Material.BEDROCK); Bukkit.getLogger().info("Block took " + (System.currentTimeMillis() - chunkLoadTime) + "ms to set"); }, 200L, 60L); } public void createWorlds() { overWorld = WorldCreator.name(worldName).type(WorldType.FLAT).environment(Environment.NORMAL).generator(chunkGen).createWorld(); netherWorld = WorldCreator.name(worldName + "_nether").type(WorldType.FLAT).environment(Environment.NETHER).generator(chunkGen).createWorld(); endWorld = WorldCreator.name(worldName + "_the_end").type(WorldType.FLAT).environment(Environment.THE_END).generator(chunkGen).createWorld(); }
Thanks!
