Loading...

Type: Bug
Resolution: Fixed
Fix Version/s: 21w11a
Affects Version/s: 20w51a, 21w03a, 1.16.5, 21w05b, 21w06a, 21w08b
Labels:
None

Confirmation Status:
Community Consensus
Category:

Player, Projectiles
Mojang Priority:
Very Important

The Bug:

When a trident is returning to its owner with loyalty and the owner goes into another world before it can reach them, the trident can no longer find the owner. This can cause a non-owner player, who is in survival and picks up the trident in this state, to be kicked from the server and stay kicked as they log in on top of the trident. Also these steps can be used to create floating tridents.

How to Reproduce:

Watch this video as it is a little hard to explain without a video:

https://youtu.be/fX8Fi6m65oo

The Cause:

The owner is null and there is no catch for this null. when the non-owner goes to pick it up, it checks to see if this player's uuid matches the other player's uuid. As the other player's uuid is null, as they are not in the same world, it causes a null point exception. Basically getOwner() returns null

The Reports

Server side report

[Server thread/WARN]: Failed to handle packet for ...
u: Ticking player
        at aah.v_(SourceFile:492) ~[server.jar:?]
        at aay.b(SourceFile:207) ~[server.jar:?]
        at nd.a(SourceFile:234) ~[server.jar:?]
        at aax.c(SourceFile:173) ~[server.jar:?]
        at net.minecraft.server.MinecraftServer.b(SourceFile:879) ~[server.jar:?]
        at zg.b(SourceFile:303) ~[server.jar:?]
        at net.minecraft.server.MinecraftServer.a(SourceFile:808) ~[server.jar:?]
        at net.minecraft.server.MinecraftServer.w(SourceFile:667) ~[server.jar:?]
        at net.minecraft.server.MinecraftServer.a(SourceFile:254) ~[server.jar:?]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_144]
Caused by: java.lang.NullPointerException
        at bfx.a_(SourceFile:546) ~[server.jar:?]
        at bgv.a_(SourceFile:184) ~[server.jar:?]
        at bft.c(SourceFile:621) ~[server.jar:?]
        at bft.k(SourceFile:597) ~[server.jar:?]
        at aqj.j(SourceFile:2254) ~[server.jar:?]
        at bft.j(SourceFile:274) ~[server.jar:?]
        at aah.v_(SourceFile:428) ~[server.jar:?]
        ... 9 more

Client side report

unexpectedly disconnected from server!
java.io.IOException: An existing connection was forcibly closed by the remote host
    at sun.nio.ch.SocketDispatcher.read0(Native Method)
    at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
    at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
    at sun.nio.ch.IOUtil.read(IOUtil.java:192)
    at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380)
    at io.netty.buffer.PooledUnsafeDirectByteBuf.setBytes(PooledUnsafeDirectByteBuf.java:288)
    at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1108)
    at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:345)
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:148)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:647)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:582)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:499)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:461)
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
    at java.lang.Thread.run(Thread.java:745)

Fabric report for those who want to see better:

Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]: net.minecraft.class_148: Ticking player
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at Not Enough Crashes deobfuscated stack trace.(1.16.2+build.47) ~[?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.server.network.ServerPlayerEntity.playerTick(ServerPlayerEntity:492) ~[?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.server.network.ServerPlayNetworkHandler.tick(ServerPlayNetworkHandler:207) ~[?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.network.ClientConnection.tick(ClientConnection:234) ~[?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.server.ServerNetworkIo.tick(ServerNetworkIo:173) ~[?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.server.MinecraftServer.tickWorlds(MinecraftServer:879) ~[intermediary-minecraft_server_1.16.2.jar:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.server.dedicated.MinecraftDedicatedServer.tickWorlds(MinecraftDedicatedServer:303) ~[?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.server.MinecraftServer.tick(MinecraftServer:808) ~[intermediary-minecraft_server_1.16.2.jar:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.server.MinecraftServer.handler$zip000$modifiedRunLoop(MinecraftServer:4761) ~[intermediary-minecraft_server_1.16.2.jar:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.server.MinecraftServer.runServer(MinecraftServer:648) ~[intermediary-minecraft_server_1.16.2.jar:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer:254) ~[intermediary-minecraft_server_1.16.2.jar:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at java.lang.Thread.run(Thread.java:834) [?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]: Caused by: java.lang.NullPointerException
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at Not Enough Crashes deobfuscated stack trace.(1.16.2+build.47) ~[?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.entity.projectile.PersistentProjectileEntity.onPlayerCollision(PersistentProjectileEntity:546) ~[?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.entity.projectile.TridentEntity.onPlayerCollision(TridentEntity:184) ~[?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.entity.player.PlayerEntity.collideWithEntity(PlayerEntity:621) ~[?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.entity.player.PlayerEntity.tickMovement(PlayerEntity:597) ~[?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.entity.LivingEntity.tick(LivingEntity:2254) ~[?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.entity.player.PlayerEntity.tick(PlayerEntity:274) ~[?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         at net.minecraft.server.network.ServerPlayerEntity.playerTick(ServerPlayerEntity:428) ~[?:?]
Jan 15 02:15:20 Ubuntu-1804-bionic-64-minimal run.sh[30730]:         ... 10 more

Details

Description

Attachments

Activity

People

Dates