Code (Java): import java.awt.Color; import java.lang.reflect.InvocationTargetException; import org.bukkit.Bukkit; import org.bukkit.Location; import org.bukkit.entity.Player; import org.bukkit.scheduler.BukkitRunnable; import com.comphenix.protocol.PacketType; import com.comphenix.protocol.ProtocolLibrary; import com.comphenix.protocol.ProtocolManager; import com.comphenix.protocol.events.PacketContainer; import com.comphenix.protocol.wrappers.EnumWrappers; import dev.jdsgames.trajectorypads.TrajectoryPads; import io.netty.util.internal.ThreadLocalRandom; public class SpawnParticlesRunnable implements Runnable { // Current Plugin private TrajectoryPads trajectoryPads; // Protocol Manager private ProtocolManager pm; private PacketContainer packet; // Current Player Effected private Player player; // Current Iteration private int currentIteration; // Max Iterations private int numberOfIterations; // Task ID private int taskID; public SpawnParticlesRunnable(TrajectoryPads trajectoryPads, Player player, int numberOfIterations) { this.trajectoryPads = trajectoryPads; this.player = player; this.currentIteration = 0; this.numberOfIterations = numberOfIterations; taskID = Bukkit.getServer().getScheduler().scheduleSyncRepeatingTask(trajectoryPads, this , 5L, 5L); } @Override public void run() { Bukkit.getServer().broadcastMessage("Current Particle: " + (currentIteration+1)); // Define a R G B setup int red = ThreadLocalRandom.current().nextInt(200,255); int green = ThreadLocalRandom.current().nextInt(200,255); int blue = ThreadLocalRandom.current().nextInt(240,255); // Define Location to Spawn Particles Location loc = player.getLocation(); // Default XYZ double x = loc.getX(); double y = loc.getY(); double z = loc.getZ(); // Offset XYZ double xOff = ThreadLocalRandom.current().nextDouble(0.0,1.5); double yOff = ThreadLocalRandom.current().nextDouble(0.0,1.5); double zOff = ThreadLocalRandom.current().nextDouble(0.0,1.5); // Swap Positive and Negative of Offsets if(ThreadLocalRandom.current().nextInt(2)==0) xOff *= -1; if(ThreadLocalRandom.current().nextInt(2)==0) yOff *= -1; if(ThreadLocalRandom.current().nextInt(2)==0) zOff *= -1; // Define a Color Color color = new Color(red,green,blue); pm = ProtocolLibrary.getProtocolManager(); new BukkitRunnable() { @Override public void run() { packet = pm.createPacket(PacketType.Play.Server.WORLD_PARTICLES); packet.getModifier().writeDefaults(); packet.getParticles().writeSafely(0, EnumWrappers.Particle.REDSTONE); packet.getFloat().writeSafely(0, (float) x); packet.getFloat().writeSafely(1, (float) y); packet.getFloat().writeSafely(2, (float) z); packet.getFloat().writeSafely(3, (float) (red/255)); packet.getFloat().writeSafely(4, (float) (green/255)); packet.getFloat().writeSafely(5, (float) (blue/255)); packet.getFloat().writeSafely(6, (float) 1F); // Crashing Player: // 19.01 17:35:24 [Server] ERROR java.lang.NullPointerException // 19.01 17:35:24 [Disconnect] User bail97 has disconnected, reason: Internal Exception: io.netty.handler.codec.EncoderException: java.lang.NullPointerException if(packet != null) { try { pm.sendServerPacket(player, packet, true); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }.runTaskTimer(trajectoryPads, 20, 2); // Up Iteration Count currentIteration++; // Too Many Iterations Cancel if(currentIteration >= numberOfIterations) { Bukkit.getServer().broadcastMessage("TOO BAD YOU'RE CANCELLED"); // Cancel this task Bukkit.getServer().getScheduler().cancelTask(taskID); } } } Ok for starters I have been doing java for awhile myself and just got back into using the Spigot API so I am trying to get back into things. At this point I do understand I am using a Runnable rather than a BukkitRunnable which the scheduler only wants Runnables anymore as BukkitRunnables are deprecated. The event itself seems to schedule fine and doesn't crash if I do not attempt to send the particle to the player. So it will print out in game Current Particle: 1 -> 50 then "TOO BAD YOU'RE CANCELLED" This setup was testing the usage of Runnable to make sure it worked in game. I have tested null cases on the Player, PM, and Packet and they all seem fine. However, it completely boots the character out randomly between the packets and nothing displays to the user. 20.01 06:20:00 [Server] ERROR java.lang.NullPointerException 20.01 06:20:00 [Server] WARN io.netty.handler.codec.EncoderException: java.lang.NullPointerException 20.01 06:20:00 [Server] WARN at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:125) 20.01 06:20:00 [Server] WARN at com.comphenix.protocol.injector.netty.ChannelInjector$1.write(ChannelInjector.java:249) 20.01 06:20:00 [Server] WARN at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:738) 20.01 06:20:00 [Server] WARN at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:801) 20.01 06:20:00 [Server] WARN at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:814) 20.01 06:20:00 [Server] WARN at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:794) 20.01 06:20:00 [Server] WARN at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:831) 20.01 06:20:00 [Server] WARN at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:1071) 20.01 06:20:00 [Server] WARN at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:300) 20.01 06:20:00 [Server] WARN at com.comphenix.protocol.injector.netty.ChannelProxy.writeAndFlush(ChannelProxy.java:327) 20.01 06:20:00 [Server] WARN at net.minecraft.server.v1_13_R2.NetworkManager.lambda$4(NetworkManager.java:198) 20.01 06:20:00 [Server] WARN at com.comphenix.protocol.injector.netty.ChannelInjector$3.lambda$onMessageScheduled$1(ChannelInjector.java:321) 20.01 06:20:00 [Server] WARN at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) 20.01 06:20:00 [Server] WARN at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404) 20.01 06:20:00 [Server] WARN at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:313) 20.01 06:20:00 [Server] WARN at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884) 20.01 06:20:00 [Server] WARN at java.lang.Thread.run(Unknown Source) 20.01 06:20:00 [Server] WARN Caused by: java.lang.NullPointerException 20.01 06:20:00 [Server] WARN at net.minecraft.server.v1_13_R2.PacketPlayOutWorldParticles.b(SourceFile:66) 20.01 06:20:00 [Server] WARN at net.minecraft.server.v1_13_R2.PacketEncoder.encode(SourceFile:46) 20.01 06:20:00 [Server] WARN at net.minecraft.server.v1_13_R2.PacketEncoder.encode(SourceFile:15) 20.01 06:20:00 [Server] WARN at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) 20.01 06:20:00 [Server] WARN at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 20.01 06:20:00 [Server] WARN at java.lang.reflect.Method.invoke(Unknown Source) 20.01 06:20:00 [Server] WARN at com.comphenix.protocol.injector.netty.ChannelInjector.encode(ChannelInjector.java:473) 20.01 06:20:00 [Server] WARN at com.comphenix.protocol.injector.netty.ChannelInjector.access$100(ChannelInjector.java:64) 20.01 06:20:00 [Server] WARN at com.comphenix.protocol.injector.netty.ChannelInjector$1.encode(ChannelInjector.java:243) 20.01 06:20:00 [Server] WARN at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107) 20.01 06:20:00 [Server] WARN ... 16 more 20.01 06:20:01 [Disconnect] User JdsgamesYT has disconnected, reason: Internal Exception: io.netty.handler.codec.EncoderException: java.lang.NullPointerException This is where I am stuck as any reference to sending packets similar to what I am doing shows similar code.
Honestly, was going off of various references and they all utilized what I showed above. Which now seems like a huge waste of time >.> Thank you @_Donut_
