Failed to modify player's pipeline. (NoSuchElementException/packet_handler)

[andrewkm]

Just making sure

• I made sure, this bug is not already known or reported.
• I believe, that this bug is fixable.

Reproduction

Looks to happen immediately after the player's login,
Unknown reproduction.

[17:36:00] [Netty Server IO #1/WARN]: [DecentHolograms] Failed to modify player's pipeline. (AusRoona)
java.util.NoSuchElementException: packet_handler
	at io.netty.channel.DefaultChannelPipeline.getContextOrDie(DefaultChannelPipeline.java:1073) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.channel.DefaultChannelPipeline.addBefore(DefaultChannelPipeline.java:248) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.channel.DefaultChannelPipeline.addBefore(DefaultChannelPipeline.java:237) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
	at DecentHolograms-2.8.9.jar/eu.decentsoftware.holograms.api.nms.PacketListener.lambda$hook$0(PacketListener.java:30) ~[DecentHolograms-2.8.9.jar:?]
	at DecentHolograms-2.8.9.jar/eu.decentsoftware.holograms.api.nms.PacketListener.executeOnPipeline(PacketListener.java:52) ~[DecentHolograms-2.8.9.jar:?]
	at DecentHolograms-2.8.9.jar/eu.decentsoftware.holograms.api.nms.PacketListener.lambda$executeOnPipeline$2(PacketListener.java:54) ~[DecentHolograms-2.8.9.jar:?]
	at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:569) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at java.base/java.lang.Thread.run(Thread.java:1570) ~[?:?]

Solution

No response

Server Version

Paper version 1.20.6-147-ver/1.20.6@e41d44f

Client Version

Cannot detect the player's client version nor are they available to ask.

Plugin Version

2.8.9 - Compiled against (24af340)

Log

https://pastebin.com/raw/bC0MWxUV

[d0by1]

Hi, I've added additional details to the log message associated with this error in DH 2.8.10. Could you please test the issue in this new version and share the updated log message with me? Thanks!

[IAISI]

Still an issue on

> ver DecentHolograms
[22:34:48 INFO]: DecentHolograms version 2.8.11
[22:34:48 INFO]: A lightweight yet very powerful hologram plugin with many features and configuration options.
[22:34:48 INFO]: Author: d0by

and latest Paper 1.21.1

[22:24:32] [Netty Epoll Server IO #2/WARN]: [DecentHolograms] Failed to modify player's pipeline. player: PlayerName, availableElements: [DefaultChannelPipeline$TailContext#0]
java.util.NoSuchElementException: packet_handler
	at io.netty.channel.DefaultChannelPipeline.getContextOrDie(DefaultChannelPipeline.java:1073) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.channel.DefaultChannelPipeline.addBefore(DefaultChannelPipeline.java:248) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.channel.DefaultChannelPipeline.addBefore(DefaultChannelPipeline.java:237) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
	at DecentHolograms.jar/eu.decentsoftware.holograms.api.nms.PacketListener.lambda$hook$0(PacketListener.java:32) ~[DecentHolograms.jar:?]
	at DecentHolograms.jar/eu.decentsoftware.holograms.api.nms.PacketListener.executeOnPipeline(PacketListener.java:54) ~[DecentHolograms.jar:?]
	at DecentHolograms.jar/eu.decentsoftware.holograms.api.nms.PacketListener.lambda$executeOnPipeline$2(PacketListener.java:56) ~[DecentHolograms.jar:?]
	at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:413) ~[netty-transport-classes-epoll-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
[22:24:32] [Server thread/INFO]: PlayerName lost connection: Disconnected

Also using ViaVersion, ViaBackwards and ViaRewind

[andrewkm]

Still an issue here on our end via Paper 1.21.3 Build 50.

[11:14:15] [Server thread/INFO]: playername[/redacted-IP] logged in with entity id 12769168 at ([rising]2669.5, 74.0, -9596.5)
[11:14:16] [Netty Server IO #0/WARN]: [DecentHolograms] Failed to modify player's pipeline. player: playername, availableElements: [DefaultChannelPipeline$TailContext#0]
java.util.NoSuchElementException: packet_handler
	at io.netty.channel.DefaultChannelPipeline.getContextOrDie(DefaultChannelPipeline.java:1073) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.channel.DefaultChannelPipeline.addBefore(DefaultChannelPipeline.java:248) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.channel.DefaultChannelPipeline.addBefore(DefaultChannelPipeline.java:237) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
	at DecentHolograms-2.8.12.jar/eu.decentsoftware.holograms.api.nms.PacketListener.lambda$hook$0(PacketListener.java:32) ~[DecentHolograms-2.8.12.jar:?]
	at DecentHolograms-2.8.12.jar/eu.decentsoftware.holograms.api.nms.PacketListener.executeOnPipeline(PacketListener.java:54) ~[DecentHolograms-2.8.12.jar:?]
	at DecentHolograms-2.8.12.jar/eu.decentsoftware.holograms.api.nms.PacketListener.lambda$executeOnPipeline$2(PacketListener.java:56) ~[DecentHolograms-2.8.12.jar:?]
	at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:569) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.97.Final.jar:4.1.97.Final]
	at java.base/java.lang.Thread.run(Thread.java:1575) ~[?:?]
[11:14:16] [Server thread/INFO]: playername lost connection: Kicked for exceeding packet rate limit

@d0by1

[Andre601]

The last line seems to be interesting:
playername lost connection: Kicked for exceeding packet rate limit