Bukkit

when player command on server stopping, server was not stopped.
i found some logs it says due to mycommand.

[17:15:22] [Netty Server IO #3/ERROR]: Please notify author of plugin causing this execution to fix this bug! see: http://bit.ly/1oSiM6C
java.lang.Throwable: null
at net.minecraft.server.network.ServerGamePacketListenerImpl.handleCommand(ServerGamePacketListenerImpl.java:2581) ~[?:?]
at org.bukkit.craftbukkit.v1_20_R1.entity.CraftPlayer.chat(CraftPlayer.java:703) ~[purpur-1.20.1.jar:git-Purpur-2025]
at it.emmerrei.mycommand.execute.DispatchCommands.ExecuteCommands(DispatchCommands.java:1454) ~[MyCommand.jar:?]
at it.emmerrei.mycommand.execute.DispatchCommands.PerformMycmdCommands(DispatchCommands.java:1313) ~[MyCommand.jar:?]
at it.emmerrei.mycommand.execute.DispatchCommands.ExecuteMyCommandCommands(DispatchCommands.java:525) ~[MyCommand.jar:?]
at it.emmerrei.mycommand.listener.PreprocessEvent.onPlayerCommandPreprocess(PreprocessEvent.java:283) ~[MyCommand.jar:?]
at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor1111.execute(Unknown Source) ~[?:?]
at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:77) ~[purpur-api-1.20.1-R0.1-SNAPSHOT.jar:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:77) ~[purpur-api-1.20.1-R0.1-SNAPSHOT.jar:git-Purpur-2025]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[purpur-api-1.20.1-R0.1-SNAPSHOT.jar:?]
at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[purpur-1.20.1.jar:git-Purpur-2025]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:126) ~[purpur-1.20.1.jar:git-Purpur-2025]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:617) ~[purpur-api-1.20.1-R0.1-SNAPSHOT.jar:?]
at net.minecraft.server.network.ServerGamePacketListenerImpl.performChatCommand(ServerGamePacketListenerImpl.java:2370) ~[?:?]
at net.minecraft.server.network.ServerGamePacketListenerImpl.lambda$handleChatCommand$21(ServerGamePacketListenerImpl.java:2354) ~[?:?]
at net.minecraft.util.thread.BlockableEventLoop.submit(BlockableEventLoop.java:68) ~[?:?]
at net.minecraft.server.network.ServerGamePacketListenerImpl.handleChatCommand(ServerGamePacketListenerImpl.java:2347) ~[?:?]
at net.minecraft.network.protocol.game.ServerboundChatCommandPacket.handle(ServerboundChatCommandPacket.java:25) ~[purpur-1.20.1.jar:git-Purpur-2025]
at net.minecraft.network.protocol.game.ServerboundChatCommandPacket.a(ServerboundChatCommandPacket.java:11) ~[purpur-1.20.1.jar:git-Purpur-2025]
at net.minecraft.network.Connection.genericsFtw(Connection.java:324) ~[?:?]
at net.minecraft.network.Connection.channelRead0(Connection.java:308) ~[?:?]
at net.minecraft.network.Connection.channelRead0(Connection.java:51) ~[?:?]
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:93) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at com.ticxo.modelengine.nms.v1_20_R1.network.ModelEngineChannelHandler.channelRead(ModelEngineChannelHandler.java:104) ~[Model-Engine-R3.1.8.jar:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:93) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.lumine.mythic.lib.util.network.LightInjector$PacketHandler.channelRead(LightInjector.java:520) ~[MythicLib-1.6.1.jar:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[netty-codec-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at com.comphenix.protocol.injector.netty.channel.InboundPacketInterceptor.channelRead(InboundPacketInterceptor.java:28) ~[ProtocolLib.jar:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346) ~[netty-codec-4.1.87.Final.jar:4.1.87.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318) ~[netty-codec-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346) ~[netty-codec-4.1.87.Final.jar:4.1.87.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318) ~[netty-codec-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346) ~[netty-codec-4.1.87.Final.jar:4.1.87.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318) ~[netty-codec-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286) ~[netty-handler-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.handler.flush.FlushConsolidationHandler.channelRead(FlushConsolidationHandler.java:152) ~[netty-handler-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.87.Final.jar:4.1.87.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.87.Final.jar:4.1.87.Final]
at java.lang.Thread.run(Thread.java:833) ~[?:?]