[SPIGOT-6594] NPE at Bukkit.getServer().getGenerateStructures() call Created: 21/Jun/21  Updated: 23/Jun/21  Resolved: 23/Jun/21

Status: Resolved
Project: Spigot
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Bug Priority: Minor
Reporter: Joo200 Assignee: Unassigned
Resolution: Fixed Votes: 0
Labels: Properties, api
Environment:

Windows 10, Currently latest spigot release

Version: This server is running CraftBukkit version 3159-Spigot-f773da8-887bc05 (MC: 1.17) (Implementing API version 1.17-R0.1-SNAPSHOT)
Plugin: WorldGuard
Guidelines Read: Yes

 Description   

I'm running the latest version from Spigot, to create a System report I want to read different server settings.

 

The call Bukkit.getServer().getGenerateStructures() generates a NPE.

Full error:

[14:59:56] [Server thread/INFO]: Cannot invoke "net.minecraft.world.level.levelgen.GeneratorSettings.shouldGenerateMapFeatures()" because "org.bukkit.craftbukkit.v1_17_R1.CraftServer.getProperties().Y" is null

The worlds are fresh generated.

 Comments   
Comment by Joo200 [ 23/Jun/21 ]

I use the method in a command (has to be after worlds are loaded)

public void onCondition(CommandSender sender) {
    if (Bukkit.getServer().getGenerateStructures()) {
        sender.sendMessage("True");
    } else {
        sender.sendMessage("False");
    }
}

 

WorldGuard did strip a little bit the stacktrace. here is the complete stacktrace:

[23:58:38] [Server thread/ERROR]: [ACF] Exception in command: acf condition
[23:58:38] [Server thread/ERROR]: [ACF] java.lang.reflect.InvocationTargetException
[23:58:38] [Server thread/ERROR]: [ACF]         at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[23:58:38] [Server thread/ERROR]: [ACF]         at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
[23:58:38] [Server thread/ERROR]: [ACF]         at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[23:58:38] [Server thread/ERROR]: [ACF]         at java.base/java.lang.reflect.Method.invoke(Method.java:567)
[23:58:38] [Server thread/ERROR]: [ACF]         at com.exampleplugin.lib.acf.RegisteredCommand.invoke(RegisteredCommand.java:152)
[23:58:38] [Server thread/ERROR]: [ACF]         at com.exampleplugin.lib.acf.BaseCommand.executeCommand(BaseCommand.java:577)
[23:58:38] [Server thread/ERROR]: [ACF]         at com.exampleplugin.lib.acf.BaseCommand.execute(BaseCommand.java:513)
[23:58:38] [Server thread/ERROR]: [ACF]         at com.exampleplugin.lib.acf.RootCommand.execute(RootCommand.java:99)
[23:58:38] [Server thread/ERROR]: [ACF]         at com.exampleplugin.lib.acf.BukkitRootCommand.execute(BukkitRootCommand.java:81)
[23:58:38] [Server thread/ERROR]: [ACF]         at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149)
[23:58:38] [Server thread/ERROR]: [ACF]         at org.bukkit.craftbukkit.v1_17_R1.CraftServer.dispatchCommand(CraftServer.java:760)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.server.network.PlayerConnection.handleCommand(PlayerConnection.java:1944)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.server.network.PlayerConnection.a(PlayerConnection.java:1783)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.server.network.PlayerConnection.a(PlayerConnection.java:1764)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.network.protocol.game.PacketPlayInChat.a(PacketPlayInChat.java:46)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.network.protocol.game.PacketPlayInChat.a(PacketPlayInChat.java:1)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.network.protocol.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:30)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.server.TickTask.run(SourceFile:18)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.util.thread.IAsyncTaskHandler.executeTask(SourceFile:151)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.util.thread.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.util.thread.IAsyncTaskHandler.executeNext(SourceFile:125)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.server.MinecraftServer.bg(MinecraftServer.java:1125)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.server.MinecraftServer.executeNext(MinecraftServer.java:1118)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.util.thread.IAsyncTaskHandler.executeAll(SourceFile:110)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.server.MinecraftServer.sleepForTick(MinecraftServer.java:1101)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.server.MinecraftServer.x(MinecraftServer.java:1031)
[23:58:38] [Server thread/ERROR]: [ACF]         at net.minecraft.server.MinecraftServer.lambda$0(MinecraftServer.java:307)
[23:58:38] [Server thread/ERROR]: [ACF]         at java.base/java.lang.Thread.run(Thread.java:831)
[23:58:38] [Server thread/ERROR]: [ACF] Caused by: java.lang.NullPointerException: Cannot invoke "net.minecraft.world.level.levelgen.GeneratorSettings.shouldGenerateMapFeatures()" because "org.bukkit.craftbukkit.v1_17_R1.CraftServer.getProperties().Y" is null
[23:58:38] [Server thread/ERROR]: [ACF]         at org.bukkit.craftbukkit.v1_17_R1.CraftServer.getGenerateStructures(CraftServer.java:626)
[23:58:38] [Server thread/ERROR]: [ACF]         at co.aikar.acfexample.SomeCommand.onCondition(SomeCommand.java:90)
[23:58:38] [Server thread/ERROR]: [ACF]         ... 28 more
Comment by md_5 [ 23/Jun/21 ]

Code please. Are you doing this on startup before worlds are loaded?

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