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Mobs despawn when going through portal due to CB ticking all worlds
Expected behavior
I expected a wither skeleton to come through the nether portal
Observed/Actual behavior
So I went to the farm and a wither skeleton spawned, so I saw it went into the nether portal and I followed it after going through the nether portal the wither skeleton was not found idk where it went
Steps/models to reproduce
this is the wither skeleton farm that I'm using https://www.youtube.com/watch?v=VL7HkV4y3Uo&t=684s
Plugin list
No plugins I made a new server and just dragged the world folder into to test the farm
Paper version
1.17.1 #196 latest
Agreements
- [X] I am running the latest version of Paper available from https://papermc.io/downloads.
- [X] I have searched for and ensured there isn't already an open issue regarding this.
- [X] My version of Minecraft is supported by Paper.
Other
No response
So I went to the farm and a wither skeleton spawned, so I saw it went into the nether portal and I followed it after going through the nether portal the wither skeleton was not found idk where it went
Did you test with anyone on the other end? I think skeletons just despawn.
Yes, it is more than likely that the skeletons just despawned. Please ensure you are close enough to the skeletons, or try with another user around. In addition, check your despawn-ranges in paper.yml. They are in blocks.
To recap conversation on discord apparently the wither skeletons will despawn when they go through the portal, behaviour that does not persist on vanilla or spigot. I haven't looked at this yet at all, but re-opening for the author until that is done.
caused by https://hub.spigotmc.org/stash/projects/SPIGOT/repos/craftbukkit/browse/nms-patches/net/minecraft/server/level/WorldServer.patch?at=9ed7e4fbe4c0cd2076a52d65a9ea8ae810d0e176#123-132 / https://github.com/Byteflux/CraftBukkit/commit/671a2893f42a66ce1e966369ce2212c4df9953eb. I haven't fully evaluated the possible ramifications of reverting this. but seems safeish? Keeping behaviour from 1.2.5 is a bit...
Do we have any update? Isn't it just a matter of editing a few lines of code?
What lines would I have to change? Also how would I change them and what to? I don’t know how to code in Java.
caused by https://hub.spigotmc.org/stash/projects/SPIGOT/repos/craftbukkit/browse/nms-patches/net/minecraft/server/level/WorldServer.patch?at=9ed7e4fbe4c0cd2076a52d65a9ea8ae810d0e176#123-132 / Byteflux/CraftBukkit@671a289. I haven't fully evaluated the possible ramifications of reverting this. but seems safeish? Keeping behaviour from 1.2.5 is a bit...
Hello, any update on this? This bug seems to prevent any mob to pass a portal, which is the basic concept of almost all most efficitent farms in the game, as it takes the mobs out of the mob cap.
Looking at the link you sent, it seems like the variable flag is always true, which is a bit weird for a variable used in an if right after that.
If there's players in the other dimension that's not a bug, that's 100% how mojang programmed it, all of those types of farms are designed for single player
On Tue, 21 Mar 2023, 15:57 Rotaru Razvan - Andrei, @.***> wrote:
I've encountered this issue too, these are my findings: the farm works if there's < 2 players in the overworld, the mobs despawn only when there are multiple players in said dimension (maybe due to optimization). Mobs don't despawn when there are no players in said dimension.
— Reply to this email directly, view it on GitHub https://github.com/PaperMC/Paper/issues/6456#issuecomment-1478100135, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAJMAZEQDHJKJA5IOIXTVZLW5HFWRANCNFSM5CRWRXEA . You are receiving this because you are subscribed to this thread.Message ID: @.***>
So there has to only be one person on the server?
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From: Shane Freeder @.> Sent: Tuesday, March 21, 2023 1:14:53 PM To: PaperMC/Paper @.> Cc: NBS-Paste @.>; Comment @.> Subject: Re: [PaperMC/Paper] Mobs despawn when going through portal due to CB ticking all worlds (#6456)
If there's players in the other dimension that's not a bug, that's 100% how mojang programmed it, all of those types of farms are designed for single player
On Tue, 21 Mar 2023, 15:57 Rotaru Razvan - Andrei, @.***> wrote:
I've encountered this issue too, these are my findings: the farm works if there's < 2 players in the overworld, the mobs despawn only when there are multiple players in said dimension (maybe due to optimization). Mobs don't despawn when there are no players in said dimension.
— Reply to this email directly, view it on GitHub https://github.com/PaperMC/Paper/issues/6456#issuecomment-1478100135, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAJMAZEQDHJKJA5IOIXTVZLW5HFWRANCNFSM5CRWRXEA . You are receiving this because you are subscribed to this thread.Message ID: @.***>
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yes @NBS-Paste as @electronicboy mentioned, that's indeed the Vanilla behavior there.
This question has been asked many times in paper-help Discord and my friend Kyle has made a simple plugin that allow entity to exist for an extended period of time without player within range,
https://hangar.papermc.io/Kyle/Otherside/
The source code can be viewed publicly and this "should" make most portal farm works (given that the entity is then transported back relatively quickly)
I hope this helps you <3
https://github.com/PaperMC/Paper/pull/9025 - removes the override for the empty worlds, this ofc will not fix issues purely brought on by the fact that many farms are designed for single player servers (embedded/external)
yes @NBS-Paste as @electronicboy mentioned, that's indeed the Vanilla behavior there.
This question has been asked many times in paper-help Discord and my friend Kyle has made a simple plugin that allow entity to exist for an extended period of time without player within range,
https://hangar.papermc.io/Kyle/Otherside/
The source code can be viewed publicly and this "should" make most portal farm works (given that the entity is then transported back relatively quickly)
I hope this helps you <3
a year later, but this works great, thanks!!
