Posted August 28, 20223 yr I have some problems making a Capability work. Upon joining a world this happens: Console says: Spoiler [03:57:02] [Server thread/ERROR] [ne.mi.ev.EventBus/EVENTBUS]: Exception caught during firing event: Duplicate Capability Key: levelup:playerclass darkorg.levelup.capability.PlayerClassProvider@7ed5e585 Index: 2 Listeners: 0: NORMAL 1: ASM: darkorg.levelup.event.CapabilityEvents@5752e08e onAttachCapabilities(Lnet/minecraftforge/event/AttachCapabilitiesEvent;)V 2: ASM: darkorg.levelup.event.CapabilityEvents@33e25462 onAttachCapabilities(Lnet/minecraftforge/event/AttachCapabilitiesEvent;)V 3: ASM: darkorg.levelup.event.CapabilityEvents@115c5e72 onAttachCapabilities(Lnet/minecraftforge/event/AttachCapabilitiesEvent;)V 4: ASM: darkorg.levelup.event.CapabilityEvents@76cc5f97 onAttachCapabilities(Lnet/minecraftforge/event/AttachCapabilitiesEvent;)V 5: ASM: darkorg.levelup.event.CapabilityEvents@2104cf21 onAttachCapabilities(Lnet/minecraftforge/event/AttachCapabilitiesEvent;)V java.lang.IllegalStateException: Duplicate Capability Key: levelup:playerclass darkorg.levelup.capability.PlayerClassProvider@7ed5e585 at TRANSFORMER/[email protected]/net.minecraftforge.event.AttachCapabilitiesEvent.addCapability(AttachCapabilitiesEvent.java:57) at TRANSFORMER/[email protected]/darkorg.levelup.event.CapabilityEvents.onAttachCapabilities(CapabilityEvents.java:22) at TRANSFORMER/[email protected]/darkorg.levelup.event.__CapabilityEvents_onAttachCapabilities_AttachCapabilitiesEvent.invoke(.dynamic) at MC-BOOTSTRAP/net.minecraftforge.eventbus/net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:73) at MC-BOOTSTRAP/net.minecraftforge.eventbus/net.minecraftforge.eventbus.EventBus.post(EventBus.java:315) at MC-BOOTSTRAP/net.minecraftforge.eventbus/net.minecraftforge.eventbus.EventBus.post(EventBus.java:296) at TRANSFORMER/[email protected]/net.minecraftforge.event.ForgeEventFactory.gatherCapabilities(ForgeEventFactory.java:510) at TRANSFORMER/[email protected]/net.minecraftforge.event.ForgeEventFactory.gatherCapabilities(ForgeEventFactory.java:504) at TRANSFORMER/[email protected]/net.minecraftforge.common.capabilities.CapabilityProvider.doGatherCapabilities(CapabilityProvider.java:72) at TRANSFORMER/[email protected]/net.minecraftforge.common.capabilities.CapabilityProvider.gatherCapabilities(CapabilityProvider.java:67) at TRANSFORMER/[email protected]/net.minecraftforge.common.capabilities.CapabilityProvider.gatherCapabilities(CapabilityProvider.java:51) at TRANSFORMER/[email protected]/net.minecraft.world.entity.Entity.<init>(Entity.java:260) at TRANSFORMER/[email protected]/net.minecraft.world.entity.LivingEntity.<init>(LivingEntity.java:236) at TRANSFORMER/[email protected]/net.minecraft.world.entity.player.Player.<init>(Player.java:179) at TRANSFORMER/[email protected]/net.minecraft.server.level.ServerPlayer.<init>(ServerPlayer.java:246) at TRANSFORMER/[email protected]/net.minecraft.server.players.PlayerList.getPlayerForLogin(PlayerList.java:417) at TRANSFORMER/[email protected]/net.minecraft.server.network.ServerLoginPacketListenerImpl.handleAcceptedLogin(ServerLoginPacketListenerImpl.java:142) at TRANSFORMER/[email protected]/net.minecraft.server.network.ServerLoginPacketListenerImpl.tick(ServerLoginPacketListenerImpl.java:76) at TRANSFORMER/[email protected]/net.minecraft.network.Connection.tick(Connection.java:274) at TRANSFORMER/[email protected]/net.minecraft.server.network.ServerConnectionListener.tick(ServerConnectionListener.java:160) at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:910) at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:836) at TRANSFORMER/[email protected]/net.minecraft.client.server.IntegratedServer.tickServer(IntegratedServer.java:90) at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:672) at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:244) at java.base/java.lang.Thread.run(Thread.java:833) [03:57:02] [Server thread/ERROR] [minecraft/ServerLoginPacketListenerImpl]: Couldn't place player in world java.lang.IllegalStateException: Duplicate Capability Key: levelup:playerclass darkorg.levelup.capability.PlayerClassProvider@7ed5e585 at net.minecraftforge.event.AttachCapabilitiesEvent.addCapability(AttachCapabilitiesEvent.java:57) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23182%23189!/:?] {re:classloading,pl:eventbus:A} at darkorg.levelup.event.CapabilityEvents.onAttachCapabilities(CapabilityEvents.java:22) ~[%23188!/:?] {re:classloading} at darkorg.levelup.event.__CapabilityEvents_onAttachCapabilities_AttachCapabilitiesEvent.invoke(.dynamic) ~[%23188!/:?] {re:classloading,pl:eventbus:B} at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:73) ~[eventbus-6.0.3.jar%23107!/:?] {} at net.minecraftforge.eventbus.EventBus.post(EventBus.java:315) ~[eventbus-6.0.3.jar%23107!/:?] {} at net.minecraftforge.eventbus.EventBus.post(EventBus.java:296) ~[eventbus-6.0.3.jar%23107!/:?] {} at net.minecraftforge.event.ForgeEventFactory.gatherCapabilities(ForgeEventFactory.java:510) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23182%23189!/:?] {re:classloading} at net.minecraftforge.event.ForgeEventFactory.gatherCapabilities(ForgeEventFactory.java:504) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23182%23189!/:?] {re:classloading} at net.minecraftforge.common.capabilities.CapabilityProvider.doGatherCapabilities(CapabilityProvider.java:72) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23182%23189!/:?] {re:classloading} at net.minecraftforge.common.capabilities.CapabilityProvider.gatherCapabilities(CapabilityProvider.java:67) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23182%23189!/:?] {re:classloading} at net.minecraftforge.common.capabilities.CapabilityProvider.gatherCapabilities(CapabilityProvider.java:51) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23182%23189!/:?] {re:classloading} at net.minecraft.world.entity.Entity.<init>(Entity.java:260) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23183!/:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.world.entity.LivingEntity.<init>(LivingEntity.java:236) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23183!/:?] {re:classloading} at net.minecraft.world.entity.player.Player.<init>(Player.java:179) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23183!/:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.level.ServerPlayer.<init>(ServerPlayer.java:246) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23183!/:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.players.PlayerList.getPlayerForLogin(PlayerList.java:417) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23183!/:?] {re:classloading} at net.minecraft.server.network.ServerLoginPacketListenerImpl.handleAcceptedLogin(ServerLoginPacketListenerImpl.java:142) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23183!/:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.network.ServerLoginPacketListenerImpl.tick(ServerLoginPacketListenerImpl.java:76) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23183!/:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.network.Connection.tick(Connection.java:274) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23183!/:?] {re:classloading} at net.minecraft.server.network.ServerConnectionListener.tick(ServerConnectionListener.java:160) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23183!/:?] {re:classloading} at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:910) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23183!/:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:836) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23183!/:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.client.server.IntegratedServer.tickServer(IntegratedServer.java:90) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23183!/:?] {re:classloading,pl:runtimedistcleaner:A} at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:672) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23183!/:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:244) ~[forge-1.19.2-43.1.3_mapped_parchment_2022.08.14-1.19.2-recomp.jar%23183!/:?] {re:classloading,pl:accesstransformer:B} at java.lang.Thread.run(Thread.java:833) [?:?] {} This is my Capability class: Spoiler @AutoRegisterCapability public class PlayerClassCapability implements IPlayerClassCapability { IPlayerClass playerClass; @Override public IPlayerClass getPlayerClass() { return this.playerClass; } @Override public void setPlayerClass(IPlayerClass pPlayerClass) { this.playerClass = pPlayerClass; } @Override public void resetPlayerClass() { this.playerClass = null; } @Override public void saveNBTData(@NotNull CompoundTag nbt) { if (this.playerClass != null) { nbt.putString("descriptionId", playerClass.getName()); nbt.putBoolean("isActive", playerClass.isActive()); } } @Override public void readNBTData(@NotNull CompoundTag nbt) { playerClass = PlayerClassUtil.getClassFromString(nbt.getString("pClass")); if (playerClass != null) { playerClass.setActive(nbt.getBoolean("isActive")); } } } This is my CapabilityProvider: Spoiler public class PlayerClassProvider implements ICapabilitySerializable<CompoundTag> { public static Capability<PlayerClassCapability> PLAYER_CLASS = CapabilityManager.get(new CapabilityToken<>() { }); private PlayerClassCapability playerClassCapability = null; private final LazyOptional<PlayerClassCapability> optional = LazyOptional.of(this::createPlayerClass); private PlayerClassCapability createPlayerClass() { if (this.playerClassCapability == null) { this.playerClassCapability = new PlayerClassCapability(); } return this.playerClassCapability; } @Override public @NotNull <T> LazyOptional<T> getCapability(@NotNull Capability<T> cap, @Nullable Direction side) { if (cap == PLAYER_CLASS) { return optional.cast(); } return LazyOptional.empty(); } @Override public CompoundTag serializeNBT() { CompoundTag nbt = new CompoundTag(); createPlayerClass().saveNBTData(nbt); return nbt; } @Override public void deserializeNBT(CompoundTag nbt) { createPlayerClass().readNBTData(nbt); } } AttachCapabilities event: Spoiler @SubscribeEvent public void onAttachCapabilities(@NotNull AttachCapabilitiesEvent<Entity> event) { if (event.getObject() instanceof Player player) { if (!player.getCapability(PlayerClassProvider.PLAYER_CLASS).isPresent()) { event.addCapability(new ResourceLocation(LevelUp.MOD_ID, "playerclass"), new PlayerClassProvider()); } } } Edited August 28, 20223 yr by Darkorg69 Add image
August 28, 20223 yr That error comes as a result of adding the provider twice. According to your logs, it looks like you have the `AttachCapabilitiesEvent` registered multiple times, probably as a result of using `addListener` and the annotation.
August 28, 20223 yr Author Yup, thanks For some reason my EventHandler was looking like this. Probably I have hit Ctrl+D....
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