Woodland mansion failed to generate

Please provide detailed steps to reproduce the issue. Seed and coordinates might be helpful.

Steps to Reproduce: (If looking for Mineshaft)
1. Type in command bar "/locate Mineshaft"
2. It gives you coordinates, now do "/tp [coordinates] when it says y? use 99 (as 99 is usually land or just above land)
3. WRONG PLACE! after digging down as it clearly wasn't upwards it lead me to a place with fire and water all over #NoMineshaft

Replace Mineshaft with Mansion

*NOTE THIS*
https://bugs.mojang.com/browse/MC-108801?focusedCommentId=335406&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-335406

Couldn't reproduce. We'll need seed and coordinates.

I've uploaded three screenshots: The one on top is a copy of the world using the 1.11 pre-release, which successfully generated the mansion where it was specified. The one below is of the original world at the exact same location, which says that there is a mansion there where clearly there isn't. I've also shown the seed for the world in both of these screenshots. The one on the bottom is there to show my coordinates with respect to the mansion.

So some past snapshot didn't generate your mansion?

Yes. This world was created in a snapshot where the woodland mansion was implemented.

Having the same issue (https://bugs.mojang.com/browse/MC-110551)

Since MC-108801 still exists in 1.11 , I guess this does> Can anyone confirm?

@unknown, it was already confirmed by @unknown

Yes, @unknown, I confirm. See MC-110551

So, I started a new world after 1.11 came out, and put it in creative, just so I could play around with the new stuff.
Seed: 3414608540874716617
So many villages nearby, I settled in one to protect the villagers and upgrade the buildings, and noticed a cartographer!
I traded until he sold me a Woodland map.. then took off NE to find the mansion..

2400 blocks North and 6800 blocks East, I finally started filling in the map. On the map's center was a little house icon..
I figured that icon meant a mansion.

The little icon is sitting inside a small roofed forest, but there is no mansion there!!

Is this a bug? Why would a villager sell me a map that leads thousands of blocks away, with nothing there??

Exact expected location of mansion based on the brown house icon on the woodland explorer map: Chunk (430,-155) around block (6,880/-2,480)

p.s. while typing out this bug report i checked out this seed on the 'chunkbase.com mansion finder app', and it confirms this should be a mansion location..

Relates to MC-108801

seed created this month 2/2017 # -4589128118707775879
First video was the in my world 2 slot with no mansion.
The second image is of the seed created in my world 3 slot it had the mansion but it cut in half.
I created this world because my foirst world in slot one became unplayable from terrible lag. There is nothing unique about the first world, vanilla not huge installations. I'm beginning to wonder if there is something wrong in my account that causing all my issues.

This bug still exists. I made world seed # -4589128118707775879. The cartographers map said a Mansion should be in the area of 275, 500. Its just not there. I recreated the same seed in another world slot and the Mansion is there but only half of it. The side of the mansion is totally open.

Using seed 'seedSeed', you'll end up with a mansion that doesn't exist at location "1560 (y?) 4344". (1.11.2, Windows 10 ver 1703 (15063.138):

java version "1.8.0_11"
Java(TM) SE Runtime Environment (build 1.8.0_11-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.11-b03, mixed mode)

I just had the same issue today. World was created on 1.11.2 and has always been run under that version. I bought a map, went to the location and is an ocean.

Had the same issue with a realms world. When first created the map, there was a mansion there. I know, because I screenshotted it and changed the spawn location to be closer to the mansion.

Returned to the location today (has been a couple of months) and although the /locate command tells me there should be a mansion there... Nothing!

This is hugely frustrating, as we created a new world, binning hours of gameplay on the old map, just to get a world with a mansion in it! And its gone!

Did an update break it? Will an update fix it?

Confirmed for 1.12 and a newly generated 1.12 world.

i had the same problem except when i made a world with the same seed the Mansion was there?!? (it was perfectly fine not cut in half or anything)

Note: the original world got its version updated from 1.11.2 to 1.12 but as far as i know there werent any generating related changes in 1.12

I travelled a very long time to the mansion on my exploration map. Nothing was there but a lake and dense trees.

I had this issue on a multiplayer server: I travelled out to -6000 via a long nether route following a map I got from a villager and no mansion there. I tried the locate command and it pointed me to the same spot. The server is a few months old and has been updated a couple of times but the region was generated in 1.12 (the mansion was a loooong way out and we hadn't been anywhere close).

Deleting the relevant region file and Manion.dat seems to have fixed the issue, although I haven't inspected the Mansion closely enough to check that it's not chopped in half.

Having the same issue on my world, i'd assume it would of generated a structure in a new part of my map that wasn't discovered yet on Xbox One, but it keeps leading me into a forest near my base. Shows there is a woodland mansion but doesn't appear. Ocean monument did generate also.

There's a copy of this issue somewhere else that needs to be redound.

I think these are copies, but that's not for me to judge: 107399, 110551, 111992, 108285, 108324, 110586, 96998. Sorry about not linking...

Confirmed for 1.13-pre7.

Also happened a few times in 1.13-pre8 for me, but most of the time the mansion generates normally (using the same seed each time).

I tried really hard over hours, but couldn't find a way to reproduce this reliably. It appears to be happen randomly. MC-133380 was a false lead it seems.

I watched my own recording in which I captured a case of no mansion generating and tried to execute all actions again in the same order to see if the mansion would be missing again, but to no avail. Thus, I believe it is not caused by any player action, but is rather a timing issue, data race, something along these lines.

Video: https://www.youtube.com/watch?v=TCet3Es3EVk&t=670s (see full video description for more details)

Hard to tell if the root cause might be the same as in MC-96998. The locate command does not find a partially generated mansion even if you stand on it. Unfortunately, I did not run the locate command again when no mansion was generated in above video. I'm unsure but I might have done that in another attempt which I didn't record and that it still returned the same position, with nothing generated in that area. It would mean quite a difference in the symptoms, but could still be caused by a single bug in structure generation and chunk (un-)loading.

MC-131462 was fixed for next version (probably 1.13.1), that issue may be the cause of this.

Does anyone still experience this in 18w30a / 18w30b ?

Possibly fixed. At least not a single generation failure of the Mansion in 20+ attempts using the 18w31a snapshot. The problem occurred quite infrequent however, so to be taken with a grain of salt.

SOLLUTION!

I managed to get my mansion back by looking up my backup file that was made when the world generation changed in 1.13, get in to that world, get to where the mansion should be and then copying those chunks and replacing the ones in my current world. I guess this will only work if you were never in the mansion area when the pre1.13-backup was made.

So if a backup was made on your world it should be in .minecraft/backups (.minecraft is the same folder as the saves-folder is in). Extract/make a copy of that world and load it so that it updates to 1.13 format (no backup needed this time). open for lan with cheats and type /locate Mansion. Wait for the coordinates to be written, go there and make sure all of the mansion is rendered/shown. Exit the world without moving outside of the mansion area and now go to the world folders /region folder. Sort the files by last edited. These files are named by some kind of coordinates with format xx.zz or so. You should be able to see some recently edited files which coordinates differs from the other files (at least if you hadn't been close to the mansion area before 1.13). Copy the recently added files with far coordinates and look for files with the same name in your current worlds /region folder. Delete all the files that appear to have coordinates that are close to (or the same as) the files you copied and then paste the copied files - alternatively you may just paste the copied files without deleting any first and just tell the computer to replace them. This last alternative may cause less a smooth edge towards the mansion area.

I just spent 3 sessions running to one with my little brother 25k blocks away and it didnt spawn, 1.13, so its still an issue. is there a way to fix it without turning off achievements?

@unknown, was this on a new 1.13 world or on a 1.12 to 1.13 upgraded world?

I believe it was a new 1.13, I made it just over a week ago.

Same happened to me today, walked 7k blocks, but there was no mansion (this was on a server), i created a map with the same seed in single player, the place was the same, but the mansion was actually there this time

Just had the same issue. I flew to the spot on a Woodland Mansion map on a 1.13 vanilla server with a world that was generated fresh on 1.13. Mansion wasn't where it was supposed to be. I used the locate command at spawn in a creative single player map with the same seed and it gave me the same coordinates for the Mansion. I teleported there and the Mansion generated correctly in single player.

To fix this, since it was on a freshly-explored area I was able to delete the corresponding region files on the server (while server was shut down, just in case). When I started the server up again and logged back in, the Mansion generated correctly.

In case it's relevant, I also had a similar issue on the same server and world with an End City not generating correctly. It seemed to have only generated a small part of the structure that was in one region, and completely missed the adjacent region which held the entire rest of the (massive) End City structure. The same procedure of deleting and regenerating the region file fixed it then too.

The seed is -2261615291186982711. Mansion is near -12448 ~ 5584.

seem's fix in 1.13.1-pre1

Hello, 

New to the bugs forum so sorry if I'm asking an obvious question (we'll also blame the middle of the night). This issue is now shown as "resolved"–does that mean the issue should no longer show up? Or is there a way I can resolve this that I'm not noticing on the page?

I can add the snapshots I took later, but where the Woodland Mansion map leads in my world is currently a small body of water. 

The world was created in version 1.31 and I did the update to 1.31.1

@unknown, since you created your world in 1.13 the bug was still there (therefore you see no mansion), but it's fixed in 1.13.1.

This bug is still not fixed as of 1.13.1! I've created my world in 1.13.1, traded with the cartographer to find the mansion, walked 10k blocks only to find out there is no mansion whatsoever on the supposed spot on the map. I recreated the world with the same seed and whoopsie daisy, now there is a perfectly fine mansion over there. I'm very sad and I would like to know if there is something I can do to reload the chunks on this location or something in order to fix this and get the mansion on my world as I'm on a quest to unlock all the achievements and without the mansion I can never achieve my goal. 

This is issue is still happening. created a world in 1.13.1, udpated to 1.13.2. Ran a couple thousand blocks to the mansion (survival), and nothing there but trees.

SEED: 2047053153

Attached screenshots

Edit: copied the world, and tele'd there. sure enough, there it was. I don't know why my original world didnt load it.

SOLUTION:

I saw it posted above and i followed it and it worked. My issue was the world updating from 1.13.1 to 1.13.2 before I discovered mansion.

Make sure in your world, you did not leave your character standing where the mansion will be, you may be suffocated.

TO FIX:

in c://users/user/appdata/roaming/.minercraft

• Copy your back up in /backups/yourworld into /saves

• Rename to back up (make sure not to overwrite anything in your orignal save)

• Join the game, open to lan with cheats on.

• /locate mansion

• /teleport to coordinates it provides

• Run around perimeter to make sure all surrounding blocks are loaded.

• Save and close

• Make a copy of yourworld

• Open /saves/backup/region and sort files by newest.

• Copy all files that are most recent and paste them into you the copied yourworld/region.

• Join the copy of yourworld and that should be it! Just play in the copied version as your main world now.**

I also have this issue. Fresh install, new world generated in 1.13.2, no mods.

Traded for a woodland exploerer's map, traveled to the spot indicated on the map, no mansion.

I just ran into this as well ... is there a way to correct it when running a server?

Also having this issue on a Realms server. I tried the seed on a single player creative and teleported to it, and the mansion generated fine. it's just our realms where it didn't. New world generated in 1.13.2, no mods.

Is there a fix to regenerate the mansion without having to restart the world from scratch? My friend and I have already put many hours of work into this world and don't want to lose it, and I can't edit the Realms world directly that I know of.

@sargentsnarky download the world, delete the relevant region files (figure out which region files contain which coordinates using this tool made by Dinnerbone), generate the chunks in singleplayer, and reupload the world.

I fixed a server world by copying regions from a single player world. I fixed two mansions that way and the next two were ok. Somewhere in the process I completely broke the locate command. It never returns anything and no output on the server.

I had the same issue. I got a woodland explorer map from trade, walked to the place (a part through nether, the last 10k blocks through overworld), and there was no woodland mansion at the indicated place. I created a new world with the same seed, teleported to the location, and this time, the mansion was there.

Seed: -3125116210563922514

Coordinates of Mansion: x: -15125, z: 16884

Version: 1.13.2

Same issue. Woodland mansion doesn't generate on Realms server (1.13.2 vanilla), but is present in single player creative.

Please check if that's still an issue in the latest 1.15 development snapshot.

I observed this on a multiplayer server in the 20w21a development snapshot: a Woodland Explorer map led me to a dark forest biome, but the mansion was missing. Caveat, the world's been migrated through most of the 20w* series, the map was obtained in 20w19a, and the chunk with the missing mansion was first generated in 20w21a.

Seed: -3791890928347572683
Mansion coordinations (approximate): x = 4360, z = 18360

Please let me know if you'd like any more info.

I had this exact same issue. Traded for a map, got there, no mansion found. Singleplayer 20w21a.

Please provide consistent reproduction steps on the latest version of Minecraft.