[Error] Weird console spam, not game breaking.

[JakStryker]

Server: 1.21.10 Paper

Could not pass event InventoryOpenEvent to AnvilUnlocker v1.1.0
Console21:28:00
java.lang.NoClassDefFoundError: com/comphenix/protocol/events/PacketContainer
at AnvilUnlocker-1.1.0.jar/com.github.jikoo.anvilunlocker.AnvilUnlocker.setInstantBuild(AnvilUnlocker.java:83) ~[AnvilUnlocker-1.1.0.jar:?]
at AnvilUnlocker-1.1.0.jar/com.github.jikoo.anvilunlocker.AnvilUnlocker.onInventoryOpen(AnvilUnlocker.java:50) ~[AnvilUnlocker-1.1.0.jar:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[paper-api-1.21.10-R0.1-SNAPSHOT.jar:?]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:71) ~[paper-api-1.21.10-R0.1-SNAPSHOT.jar:?]
at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:131) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:628) ~[paper-api-1.21.10-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.event.CraftEventFactory.callInventoryOpenEventWithTitle(CraftEventFactory.java:1285) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.level.ServerPlayer.openMenu(ServerPlayer.java:1810) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.world.level.block.AnvilBlock.useWithoutItem(AnvilBlock.java:60) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.world.level.block.state.BlockBehaviour$BlockStateBase.useWithoutItem(BlockBehaviour.java:906) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.level.ServerPlayerGameMode.useItemOn(ServerPlayerGameMode.java:538) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.network.ServerGamePacketListenerImpl.handleUseItemOn(ServerGamePacketListenerImpl.java:2055) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.network.protocol.game.ServerboundUseItemOnPacket.handle(ServerboundUseItemOnPacket.java:45) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.network.protocol.game.ServerboundUseItemOnPacket.handle(ServerboundUseItemOnPacket.java:10) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.network.PacketProcessor$ListenerAndPacket.handle(PacketProcessor.java:99) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.network.PacketProcessor.executeSinglePacket(PacketProcessor.java:33) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1516) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.recordTaskExecutionTimeWhileWaiting(MinecraftServer.java:1226) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1357) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:383) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.ClassNotFoundException: com.comphenix.protocol.events.PacketContainer
at org.bukkit.plugin.java.PluginClassLoader.loadClass0(PluginClassLoader.java:208) ~[paper-api-1.21.10-R0.1-SNAPSHOT.jar:?]
at org.bukkit.plugin.java.PluginClassLoader.loadClass(PluginClassLoader.java:175) ~[paper-api-1.21.10-R0.1-SNAPSHOT.jar:?]
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526) ~[?:?]
... 22 more
21:28:01
at AnvilUnlocker-1.1.0.jar/com.github.jikoo.anvilunlocker.AnvilUnlocker.setInstantBuild(AnvilUnlocker.java:83) ~[AnvilUnlocker-1.1.0.jar:?]
at AnvilUnlocker-1.1.0.jar/com.github.jikoo.anvilunlocker.AnvilUnlocker.lambda$onPrepareAnvil$0(AnvilUnlocker.java:73) ~[AnvilUnlocker-1.1.0.jar:?]
at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:78) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:474) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1749) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1623) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.dedicated.DedicatedServer.tickServer(DedicatedServer.java:430) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1343) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:383) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.ClassNotFoundException: com.comphenix.protocol.events.PacketContainer
... 10 more
WARN21:28:01
[AnvilUnlocker]: Task #534 for AnvilUnlocker v1.1.0 generated an exception
Console21:28:01
java.lang.NoClassDefFoundError: com/comphenix/protocol/events/PacketContainer
at AnvilUnlocker-1.1.0.jar/com.github.jikoo.anvilunlocker.AnvilUnlocker.setInstantBuild(AnvilUnlocker.java:83) ~[AnvilUnlocker-1.1.0.jar:?]
at AnvilUnlocker-1.1.0.jar/com.github.jikoo.anvilunlocker.AnvilUnlocker.lambda$onPrepareAnvil$0(AnvilUnlocker.java:73) ~[AnvilUnlocker-1.1.0.jar:?]
at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:78) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:474) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1749) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1623) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.dedicated.DedicatedServer.tickServer(DedicatedServer.java:430) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1343) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:383) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.ClassNotFoundException: com.comphenix.protocol.events.PacketContainer
... 10 more
WARN21:28:01
[AnvilUnlocker]: Task #535 for AnvilUnlocker v1.1.0 generated an exception
Console21:28:01
java.lang.NoClassDefFoundError: com/comphenix/protocol/events/PacketContainer
at AnvilUnlocker-1.1.0.jar/com.github.jikoo.anvilunlocker.AnvilUnlocker.setInstantBuild(AnvilUnlocker.java:83) ~[AnvilUnlocker-1.1.0.jar:?]
at AnvilUnlocker-1.1.0.jar/com.github.jikoo.anvilunlocker.AnvilUnlocker.lambda$onPrepareAnvil$0(AnvilUnlocker.java:73) ~[AnvilUnlocker-1.1.0.jar:?]
at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:78) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:474) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1749) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1623) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.dedicated.DedicatedServer.tickServer(DedicatedServer.java:430) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1343) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:383) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.ClassNotFoundException: com.comphenix.protocol.events.PacketContainer
... 10 more
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.ClassNotFoundException: com.comphenix.protocol.events.PacketContainer
... 10 more
WARN21:28:01
[AnvilUnlocker]: Task #537 for AnvilUnlocker v1.1.0 generated an exception
Console21:28:01
java.lang.NoClassDefFoundError: com/comphenix/protocol/events/PacketContainer
at AnvilUnlocker-1.1.0.jar/com.github.jikoo.anvilunlocker.AnvilUnlocker.setInstantBuild(AnvilUnlocker.java:83) ~[AnvilUnlocker-1.1.0.jar:?]
at AnvilUnlocker-1.1.0.jar/com.github.jikoo.anvilunlocker.AnvilUnlocker.lambda$onPrepareAnvil$0(AnvilUnlocker.java:73) ~[AnvilUnlocker-1.1.0.jar:?]
at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:78) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:474) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1749) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1623) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.dedicated.DedicatedServer.tickServer(DedicatedServer.java:430) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1343) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:383) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.ClassNotFoundException: com.comphenix.protocol.events.PacketContainer
... 10 more
ERROR21:28:02
Could not pass event InventoryCloseEvent to AnvilUnlocker v1.1.0
Console21:28:02
java.lang.NoClassDefFoundError: com/comphenix/protocol/events/PacketContainer
at AnvilUnlocker-1.1.0.jar/com.github.jikoo.anvilunlocker.AnvilUnlocker.setInstantBuild(AnvilUnlocker.java:83) ~[AnvilUnlocker-1.1.0.jar:?]
at AnvilUnlocker-1.1.0.jar/com.github.jikoo.anvilunlocker.AnvilUnlocker.onInventoryClose(AnvilUnlocker.java:59) ~[AnvilUnlocker-1.1.0.jar:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[paper-api-1.21.10-R0.1-SNAPSHOT.jar:?]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:71) ~[paper-api-1.21.10-R0.1-SNAPSHOT.jar:?]
at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:131) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:628) ~[paper-api-1.21.10-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.event.CraftEventFactory.handleInventoryCloseEvent(CraftEventFactory.java:1474) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.network.ServerGamePacketListenerImpl.handleContainerClose(ServerGamePacketListenerImpl.java:2923) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.network.ServerGamePacketListenerImpl.handleContainerClose(ServerGamePacketListenerImpl.java:2915) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.network.protocol.game.ServerboundContainerClosePacket.handle(ServerboundContainerClosePacket.java:33) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.network.protocol.game.ServerboundContainerClosePacket.handle(ServerboundContainerClosePacket.java:8) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.network.PacketProcessor$ListenerAndPacket.handle(PacketProcessor.java:99) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.network.PacketProcessor.executeSinglePacket(PacketProcessor.java:33) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1516) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.recordTaskExecutionTimeWhileWaiting(MinecraftServer.java:1226) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1357) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:383) ~[paper-1.21.10.jar:1.21.10-88-2a1871b]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.ClassNotFoundException: com.comphenix.protocol.events.PacketContainer
... 19 more

[zefir-git]

I was unable to reproduce this on Paper 1.21.10-91. It might be a ProtocolLib bug. I tested with ProtocolLib 5.4.0 and also without it.

If possible, try with ProtocolLib 5.4.0. You can also try https://github.com/Jikoo/AnvilUnlocker/releases/tag/1.1.1

[zefir-git]

I’ve identified an error in my earlier testing.

After retesting, I was able to reproduce the issue, which occurs due to ProtocolLib not being installed.

[zefir-git]

#5 will now show an error in advance if you don’t have ProtocolLib installed. Clarified that ProtocolLib is required in #6