MC-97102[Multiplayer] All hostile mobs in dimension despawn when player enters dimension
On a 1.9.2 server I have this bug where all hostile mobs in a dimension despawn as soon as I enter this dimension. I found out about this when I was building my guardian XP farm. As you can see in the video not only the guardians despawn, naturally spawned mobs also despawn. I also went to the nether with an other portal which wasn't in reach of the chunks of my "guardian portal", but they still despawned.
Then I spawned a Creeper in the Nether and pushed it through the portal. When I went back to the overworld it wasn't there anymore.
Because there are many mob farm designs with a portal like mine I think this has to be unintended. The world from the server also works fine in single player, so this has to be multiplayer/server bug.
Link to the video: https://youtu.be/dXv8AXMKe7Y
Yours sincerely
diabolo66
Environment
Windows 10, Java 1.8.0_71
Created Issue:
All Hostile mobs despawn in dimension when player is going through a Nether Portal
When I enter a nether portal all hostile mobs in the dimension I want to go despawn (both for nether and overworld).
I have tested this on a 16w06a Snapshot Server (with a world generated in a 1.9 Snapshot) , in a fresh generated 16w06a single player world and in an old generated single player world. In every case I got the same result.
First I created a link between the overworld and the nether using a normal portal. Then I went to the nether an spawned some mobs there using spawning eggs (I spawned 1-2 mobs each of: Guardians, cows, blazes, zombies, creepers and zombie pigmen). After that I went through the portal again. I also spawned the same mobs in the overworld. When I went back to the nether all mobs in the nether except the cows despawned. Going back to to the overworld has the same result. Only the cows are left.
Because I used a spectator on the multiplayer server I've seen the hostile mobs despawn in the nether as soon as a survival/creative player entered the nether. Same for the overworld.
I also seen mobs despawn in the nether that were hundreds of blocks away from the nether portal when I used the spectator on the server.Hostile mobs with a custom name (name tag) didn't despawn.
I hope you figure out the problem. I discovered this bug when I built a guardian farm on a multiplayer server (1.9 snapshots). I wanted to take the guardians to the nether to trick the mob cap for the over world because I wanted to have a guardian xp farm.
Yours sincerely
diabolo66Environment
Windows 10, Java 1.8.0_71
When I enter a nether portal all hostile mobs in the dimension I want to go despawn (both for nether and overworld).
I have tested this on a 16w06a Snapshot Server (with a world generated in a 1.9 Snapshot) , in a fresh generated 16w06a single player world and in an old generated single player world. In every case I got the same result.
First I created a link between the overworld and the nether using a normal portal. Then I went to the nether an spawned some mobs there using spawning eggs (I spawned 1-2 mobs each of: Guardians, cows, blazes, zombies, creepers and zombie pigmen). After that I went through the portal again. I also spawned the same mobs in the overworld. When I went back to the nether all mobs in the nether except the cows despawned. Going back to to the overworld has the same result. Only the cows are left.
Because I used a spectator on the multiplayer server I've seen the hostile mobs despawn in the nether as soon as a survival/creative player entered the nether. Same for the overworld.
I also seen mobs despawn in the nether that were hundreds of blocks away from the nether portal when I used the spectator on the server.Hostile mobs with a custom name (name tag) didn't despawn.
I hope you figure out the problem. I discovered this bug when I built a guardian farm on a multiplayer server (1.9 snapshots). I wanted to take the guardians to the nether to trick the mob cap for the over world because I wanted to have a guardian
xpfarm.Yours sincerely
diabolo66When I enter a nether portal all hostile mobs in the dimension I want to go despawn (both for nether and overworld).
I have tested this on a 16w06a Snapshot Server (with a world generated in a 1.9 Snapshot) , in a fresh generated 16w06a single player world and in an old generated single player world. In every case I got the same result.
First I created a link between the overworld and the nether using a normal portal. Then I went to the nether an spawned some mobs there using spawning eggs (I spawned 1-2 mobs each of: Guardians, cows, blazes, zombies, creepers and zombie pigmen). After that I went through the portal again. I also spawned the same mobs in the overworld. When I went back to the nether all mobs in the nether except the cows despawned. Going back to to the overworld has the same result. Only the cows are left.
Because I used a spectator on the multiplayer server I've seen the hostile mobs despawn in the nether as soon as a survival/creative player entered the nether. Same for the overworld.
I also seen mobs despawn in the nether that were hundreds of blocks away from the nether portal when I used the spectator on the server.Hostile mobs with a custom name (name tag) didn't despawn.
I hope you figure out the problem. I discovered this bug when I built a guardian farm on a multiplayer server (1.9 snapshots). I wanted to take the guardians to the nether to trick the mob cap for the over world because I wanted to have a guardian XP farm.
Yours sincerely
diabolo66EDIT: Video here https://www.youtube.com/watch?v=dXv8AXMKe7Y
When I enter a nether portal all hostile mobs in the dimension I want to go despawn (both for nether and overworld).
I have tested this on a 16w06a Snapshot Server (with a world generated in a 1.9 Snapshot) , in a fresh generated 16w06a single player world and in an old generated single player world. In every case I got the same result.
First I created a link between the overworld and the nether using a normal portal. Then I went to the nether an spawned some mobs there using spawning eggs (I spawned 1-2 mobs each of: Guardians, cows, blazes, zombies, creepers and zombie pigmen). After that I went through the portal again. I also spawned the same mobs in the overworld. When I went back to the nether all mobs in the nether except the cows despawned. Going back to to the overworld has the same result. Only the cows are left.
Because I used a spectator on the multiplayer server I've seen the hostile mobs despawn in the nether as soon as a survival/creative player entered the nether. Same for the overworld.
I also seen mobs despawnin thenetherthat were hundreds of blocks away from the netherportalwhen Iused the spectator on the server.Hostile mobs with a custom name (name tag) didn't despawn.
I hope you figure out the problem. I discovered this bug when I built a guardian farm on a multiplayer server (1.9 snapshots). I wanted to take the guardians to the nether to trick the mob cap for the over world because I wanted to have a guardian XP farm.
Yours sincerely
diabolo66
EDIT: Video herehttps://www.youtube.com/watch?v=dXv8AXMKe7YCOMPLETE UPDATE [18.02.2016]!!!
This one is really strange and I'm still not sure if I have figured it out completely.
On a 1.9 snapshot server I have this bug where all hostile mobs in a dimension despawn as soon as I enter this dimension. I found out about this when I was building my guardian XP farm. As you can see in the video not only the guardians despawn, naturally spawned mobs also despawn. I also went to the nether with an other portal which wasn't in reach of the chunks of my "guardian portal", but they still despawned.
Then I spawned a Creeper in the Nether and pushed him through the portal. When I went back to the overworld he wasn't there anymore.Because there are many mob farm designs with a portal like mine I think this has to be unintended. The world from the server also works fine in single player, so this has to be multiplayer/server bug.
Link to the video: https://youtu.be/dXv8AXMKe7Y
Yours sincerely
diabolo66
AllHostile mobsdespawnin dimension when playeris going through a Nether Portal[Multiplayer] All hostile mobs in dimension despawn when player enters dimension
COMPLETE DESCRIPTION UPDATE [18.02.2016]!!!
This one is really strange and I'm still not sure if I have figured it out completely.
On a 1.9 snapshot server I have this bug where all hostile mobs in a dimension despawn as soon as I enter this dimension. I found out about this when I was building my guardian XP farm. As you can see in the video not only the guardians despawn, naturally spawned mobs also despawn. I also went to the nether with an other portal which wasn't in reach of the chunks of my "guardian portal", but they still despawned.
Then I spawned a Creeper in the Nether and pushed him through the portal. When I went back to the overworld he wasn't there anymore.Because there are many mob farm designs with a portal like mine I think this has to be unintended. The world from the server also works fine in single player, so this has to be multiplayer/server bug.
Link to the video: https://youtu.be/dXv8AXMKe7Y
Yours sincerely
diabolo66
COMPLETE DESCRIPTION UPDATE [18.02.2016]!!!
This one is really strange and I'm still not sure if I have figured it out completely.
On a 1.9 snapshot server I have this bug where all hostile mobs in a dimension despawn as soon as I enter this dimension. I found out about this when I was building my guardian XP farm. As you can see in the video not only the guardians despawn, naturally spawned mobs also despawn. I also went to the nether with an other portal which wasn't in reach of the chunks of my "guardian portal", but they still despawned.
Then I spawned a Creeper in the Nether and pushedhimthrough the portal. When I went back to the overworldhewasn't there anymore.Because there are many mob farm designs with a portal like mine I think this has to be unintended. The world from the server also works fine in single player, so this has to be multiplayer/server bug.
Link to the video: https://youtu.be/dXv8AXMKe7Y
Yours sincerely
diabolo66COMPLETE DESCRIPTION UPDATE [18.02.2016]!!!
This one is really strange and I'm still not sure if I have figured it out completely.
On a 1.9 snapshot server I have this bug where all hostile mobs in a dimension despawn as soon as I enter this dimension. I found out about this when I was building my guardian XP farm. As you can see in the video not only the guardians despawn, naturally spawned mobs also despawn. I also went to the nether with an other portal which wasn't in reach of the chunks of my "guardian portal", but they still despawned.
Then I spawned a Creeper in the Nether and pushed it through the portal. When I went back to the overworld it wasn't there anymore.Because there are many mob farm designs with a portal like mine I think this has to be unintended. The world from the server also works fine in single player, so this has to be multiplayer/server bug.
Link to the video: https://youtu.be/dXv8AXMKe7Y
Yours sincerely
diabolo66
is duplicated by
COMPLETE DESCRIPTION UPDATE [18.02.2016]!!!
This one is really strange and I'm still not sure if I have figured it out completely.
On a 1.9 snapshot server I have this bug where all hostile mobs in a dimension despawn as soon as I enter this dimension. I found out about this when I was building my guardian XP farm. As you can see in the video not only the guardians despawn, naturally spawned mobs also despawn. I also went to the nether with an other portal which wasn't in reach of the chunks of my "guardian portal", but they still despawned.
Then I spawned a Creeper in the Nether and pushed it through the portal. When I went back to the overworld it wasn't there anymore.Because there are many mob farm designs with a portal like mine I think this has to be unintended. The world from the server also works fine in single player, so this has to be multiplayer/server bug.
Link to the video: https://youtu.be/dXv8AXMKe7Y
Yours sincerely
diabolo66
This one is really strange and I'm still not sure if I have figured it out completely.
On a 1.9 snapshot server I have this bug where all hostile mobs in a dimension despawn as soon as I enter this dimension. I found out about this when I was building my guardian XP farm. As you can see in the video not only the guardians despawn, naturally spawned mobs also despawn. I also went to the nether with an other portal which wasn't in reach of the chunks of my "guardian portal", but they still despawned.
Then I spawned a Creeper in the Nether and pushed it through the portal. When I went back to the overworld it wasn't there anymore.Because there are many mob farm designs with a portal like mine I think this has to be unintended. The world from the server also works fine in single player, so this has to be multiplayer/server bug.
Link to the video: https://youtu.be/dXv8AXMKe7Y
Yours sincerely
diabolo66On a 1.9 snapshot server I have this bug where all hostile mobs in a dimension despawn as soon as I enter this dimension. I found out about this when I was building my guardian XP farm. As you can see in the video not only the guardians despawn, naturally spawned mobs also despawn. I also went to the nether with an other portal which wasn't in reach of the chunks of my "guardian portal", but they still despawned.
Then I spawned a Creeper in the Nether and pushed it through the portal. When I went back to the overworld it wasn't there anymore.Because there are many mob farm designs with a portal like mine I think this has to be unintended. The world from the server also works fine in single player, so this has to be multiplayer/server bug.
Link to the video: https://youtu.be/dXv8AXMKe7Y
Yours sincerely
diabolo66
is duplicated by
On a 1.9
snapshotserver I have this bug where all hostile mobs in a dimension despawn as soon as I enter this dimension. I found out about this when I was building my guardian XP farm. As you can see in the video not only the guardians despawn, naturally spawned mobs also despawn. I also went to the nether with an other portal which wasn't in reach of the chunks of my "guardian portal", but they still despawned.
Then I spawned a Creeper in the Nether and pushed it through the portal. When I went back to the overworld it wasn't there anymore.Because there are many mob farm designs with a portal like mine I think this has to be unintended. The world from the server also works fine in single player, so this has to be multiplayer/server bug.
Link to the video: https://youtu.be/dXv8AXMKe7Y
Yours sincerely
diabolo66On a 1.9.2 server I have this bug where all hostile mobs in a dimension despawn as soon as I enter this dimension. I found out about this when I was building my guardian XP farm. As you can see in the video not only the guardians despawn, naturally spawned mobs also despawn. I also went to the nether with an other portal which wasn't in reach of the chunks of my "guardian portal", but they still despawned.
Then I spawned a Creeper in the Nether and pushed it through the portal. When I went back to the overworld it wasn't there anymore.Because there are many mob farm designs with a portal like mine I think this has to be unintended. The world from the server also works fine in single player, so this has to be multiplayer/server bug.
Link to the video: https://youtu.be/dXv8AXMKe7Y
Yours sincerely
diabolo66
![[Mod] Michael Wobst](../../../data/avatars/users/37868.png){kind=small}
I cannot reproduce this in singleplayer. (Did not try multiplayer with spectators, which may somehow interact.)
I have tested some more now. In some random single player worlds it works fine. In most of my single player tests I have this bug. I haven't checked on any other snapshot servers. The map from the server worked fine when I opened it in single player. It's really weird. I don't know what triggers this bug nor do I know why it happens so"randomly", maybe there is a pattern I haven't noticed yet.Edit: I now think it's multiplayer only
I have added a video that showcases the bug in the latest snapshot (16w07b)
You can find it here; https://www.youtube.com/watch?v=dXv8AXMKe7Y
for hostile mobs without the PresistanceRequired tag sat to 1, a player must be online and loading them, or they'll despawn
The thing is that the mobs don't despawn when I leave the area. They despawn when I enter the dimension. Normally XP farms like this design work fine. (I recommend you to watch my video, then watch any other video of a XP farm that sends mobs to an other dimension because of the local mob cap)
I was having the same issue and today, after entering the nether for the second time, some mobs appeared.
After going back to the overworld for some time and back to the nether, the farm seems to be working again. I'm not quite sure what happens, I'll try to reproduce what's going on.
Same issue - running server. I also have a guardian XP farm that uses the nether to bypass the mob cap. Mobs despawn when changing dimensions.
I also encountered this bug on my guardian xp farm. I stayed in the nether in spectator mode whilst someone sent guardians through the portal in the overworld. I could see them going through, all good. But the instant he entered the nether through the nearby portal they despawned. Also all other mobs in the nether despawned and new ones spawned around him at that instant.
Same here. I built a guardian farm single player (though for a while, I did have the save file on a server - It's now back on single player only) which involves sending the guardians to the nether to get around the local mob cap... I've been having this issue since the 1.9 update. Sometimes when I AFK in the overworld near the farm & then return to the nether, the guardians are there. Other times, they all despawn in the holding tank leaving only 2-3 who are still falling through the portal.
It's been exactly one year now since I opened this ticket and still nothing happened... The ticket hasn't even been confirmed.. Shouldn't there be some progress by now?
I'm currently having this issue right now!!! (playing on PC version on a Realms server/Java/1.11.2) Help! I've just finished building a guardian xp farm that sends the mobs to a portal and crusher in the nether. Very disappointing that i have no mobs every time I come into the nether. My entrance portal is less than 32 blocks from the mob entrance portal. Zero mobs every time I come in. Something is essentially different about the way the dimensions are loaded on servers compared to single player... Has it been this way in the past? This is the first time I've tried sending mobs through a portal. I had plans for using some ghasts in the overworld but this bug will ruin that as well
Really pisses me off, spent 3 weeks on my guardian farm just to find that is doesn't work because of a stupid bug
I'm also playing on my own 1.11.2 multiplayer server and the problem still persists. Likewise I have a guardian farm that sends guardians to the nether, which I spent many days building all in Survival. It doesn't work at all now. There are numerous reports of this same bug throughout bugs.mojang.com. Many of them claimed to be resolved. Yet no resolution is actually given on any of the many bug reports and their duplicates.
The best Mojang mods have offered is simply to reiterate that mobs despawn if the chunk is unloaded, completely ignoring, time after time, the specific situation people are explaining. That is, bobs being sent to a completely unloaded chunk in the nether, where mobs should remain in an unloaded state until a player enters the nether, at which point they should be there.
Nether portals have worked this way since they were introduced in Beta. They continued to work this way up until some point in release 1.8. Yet the the mods here reply as if this change never happened, neither confirming it was an intentional change nor admitting it is a bug.
The simple fact is that the way mobs despawn in other dimensions changed radically and broke the functionality of many complex, time consuming builds. It has been over a year and the developers still won't even say if it's a bug or an intentional change (which is unlikely since it only changed for multi-player but not single-player), let alone actually try to resolve the issue.
Is this still a issue in the latest version of the game(currently 1.13.1)?
If so, please add it to the affected versions, thanks!