Unknown command console error

[kangarko]

Expected behavior

The unknown command message.

Observed/Actual behavior

[13:25:36 WARN]: Unexpected exception while parsing console command "abcd"
java.lang.NullPointerException: command
	at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:922) ~[guava-33.3.1-jre.jar:?]
	at com.destroystokyo.paper.exception.ServerCommandException.<init>(ServerCommandException.java:28) ~[paper-api-1.21.4-R0.1-SNAPSHOT.jar:?]
	at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:1040) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:1019) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at org.bukkit.craftbukkit.CraftServer.dispatchServerCommand(CraftServer.java:1000) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.dedicated.DedicatedServer.handleConsoleInputs(DedicatedServer.java:505) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.dedicated.DedicatedServer.tickConnection(DedicatedServer.java:454) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1892) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1666) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1331) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:341) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]

Steps/models to reproduce

Call some methods in Bukkit.getConsoleSender() in a plugin's onEnable(). After this, running any unknown command will print this error instead of "Unknown command message". More testing is needed as for which methods in the sender actually break this.

This started to happen in an unknown Paper update, unfortunately I don't have the time to pinpoint to the exact build.

Plugin and Datapack List

My test plugin

Paper version

This server is running Paper version 1.21.4-15-master@bb76819 (2024-12-15T09:48:21Z) (Implementing API version 1.21.4-R0.1-SNAPSHOT)

Other

No response

[electronicboy]

Need some form of minimal repro

[kangarko]

For some reason now I am getting this. Unfortunately I am not able to pinpoint the exact cause:

java.util.NoSuchElementException: No value present
	at java.base/java.util.Optional.orElseThrow(Optional.java:377) ~[?:?]
	at io.papermc.paper.command.brigadier.MessageComponentSerializer.message(MessageComponentSerializer.java:23) ~[paper-api-1.21.4-R0.1-SNAPSHOT.jar:1.21.4-15-bb76819]
	at io.papermc.paper.brigadier.PaperBrigadier.componentFromMessage(PaperBrigadier.java:45) ~[paper-api-1.21.4-R0.1-SNAPSHOT.jar:1.21.4-15-bb76819]
	at net.minecraft.commands.Commands.finishParsing(Commands.java:396) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.commands.Commands.performCommand(Commands.java:351) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.commands.Commands.performCommand(Commands.java:342) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.commands.Commands.performCommand(Commands.java:337) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.network.ServerGamePacketListenerImpl.performUnsignedChatCommand(ServerGamePacketListenerImpl.java:2301) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.network.ServerGamePacketListenerImpl.lambda$handleChatCommand$11(ServerGamePacketListenerImpl.java:2275) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:154) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1579) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:207) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:128) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1556) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1549) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:138) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.managedBlock(MinecraftServer.java:1500) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1510) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1346) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:341) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]

[Machine-Maker]

That error doesn't seem possible. It can't find the service via java's service loader API. Is something messing with the META-INF in the server or something removing it?

[kangarko]

Unfortunately it is still happening; I am very confident we do not mess with META-INF. Can you simply add an if-condition to prevent that error?

[electronicboy]

No, you don’t just hide errors when something goes sideways, that would just mask the issue and cause other side effects people would expect us to fix. As I said earlier, we need a way to reproduce this in some form of manner so that we can look into it.

…

On Sun, 5 Jan 2025 at 15:22, Matej ***@***.***> wrote: Unfortunately it is still happening; I am very confident we do not mess with META-INF. Can you simply add an if-condition to prevent that error? — Reply to this email directly, view it on GitHub <#11752 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAJMAZF6G2DJPPJH74W6GJL2JFE4FAVCNFSM6AAAAABT44BKSCVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDKNZRGY3DCMZZGY> . You are receiving this because you commented.Message ID: ***@***.***>

[kangarko]

You're right in that errors shouldn't be hidden. I'll get back on this once I steps to reproduce. Thanks.

[Lxmune]

For some reason now I am getting this. Unfortunately I am not able to pinpoint the exact cause:

java.util.NoSuchElementException: No value present
	at java.base/java.util.Optional.orElseThrow(Optional.java:377) ~[?:?]
	at io.papermc.paper.command.brigadier.MessageComponentSerializer.message(MessageComponentSerializer.java:23) ~[paper-api-1.21.4-R0.1-SNAPSHOT.jar:1.21.4-15-bb76819]
	at io.papermc.paper.brigadier.PaperBrigadier.componentFromMessage(PaperBrigadier.java:45) ~[paper-api-1.21.4-R0.1-SNAPSHOT.jar:1.21.4-15-bb76819]
	at net.minecraft.commands.Commands.finishParsing(Commands.java:396) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.commands.Commands.performCommand(Commands.java:351) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.commands.Commands.performCommand(Commands.java:342) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.commands.Commands.performCommand(Commands.java:337) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.network.ServerGamePacketListenerImpl.performUnsignedChatCommand(ServerGamePacketListenerImpl.java:2301) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.network.ServerGamePacketListenerImpl.lambda$handleChatCommand$11(ServerGamePacketListenerImpl.java:2275) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:154) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1579) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:207) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:128) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1556) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1549) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:138) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.managedBlock(MinecraftServer.java:1500) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1510) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1346) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:341) ~[paper-1.21.4.jar:1.21.4-15-bb76819]
	at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]

Hello! I encountered the exact same issue on my 1.21.3 Paper server. After some observations, I upgraded to 1.21.4 (most recent build), though it didn't fix the issue either.

After some trials & errors with my plugins, I discovered it was caused by HeadsPluginAPI. I'm not sure how it causes it, but on my side it was what caused those errors.

I'm guessing it is due to some incompatibility between some plugins and Paper👍