Arrows loosing owner, after the owning player leaves the server
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- Java
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Description
Expected behavior
In Vanilla, Arrows keep Owner, and still have the owner after reconnecting, even if the arrow gets moved by piston, slime blocks etc.
Observed/Actual behavior
In Paper, it looses its owner, i think its under the condition, that its getting moved.
Steps/models to reproduce
https://www.youtube.com/watch?v=FnUE-ZaALLw&t
I tested it with his contraption
(in the "Other" section, i also added a video of mine, where i show the issue)
this zip file includes a schematic, which is shown in the Video of Squibble
Plugin and Datapack List
No Plugins/Datapacks
Paper version
Paper 1.21.4 Build 232
Other
Hey there,
as the title says, currently arrows are loosing its owner, i think, its under a certain condition.
Yes, the arrow is in a chunkloaded chunk, and it never gets unloaded.
Im shooting the arrow, it has an owner (me), then im leaving and rejoining the server, and its owner is gone. Im not restarting the server!
I tested it with the latest 1.21.4 Version of Paper.
To verify this... i tried it on a vanilla server. On a vanilla server, the Arrow keeps its owner.
BUT (yes, capslock "BUT", because this is very important):
This doesnt happen, if the arrow isn´t moving. If it´s movement equals zero, everything is fine..
But if the arrow gets moved by a piston contraption, it looses its owner
Here is a youtube video, where i show it:
https://www.youtube.com/watch?v=vVc8BuZ2Wfo
Important to mention regarding the video:
The Server in the Video is a purpur server, but i also tested it with paper.
In the Video im using a velocity proxy in front of the server for redirection, i also tested it without velocity.
I´ve also got a plugin called "tabtps" installed, here as well, i also tested it without any plugins
To sum up: I also tested it on a completely "vanilla" paper server, and in comparison to vanilla, the arrows looses its owner, by just beeing moved whilst the player isnt online.
Some last words: I haven´t tested it further.. like.. for example shooting an arrow up in the sky, then reconnecting, and checking for its owner nbt data.
I literally only tested it with the contraption which can be seen in the Video
Greetings
Ghost
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the issue with the MirrorPylon v9.zip contraption and the linked videos on Paper 1.21.4, then compare arrow ownership before and after piston movement while the player is offline. Trace the arrow movement and persistence path to identify where ownership is lost; done means the arrow retains its owner after reconnecting, matching vanilla behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- backend, game-dev
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100