[MC-12363] Lava / water / powder snow bucket desync when using it while rapidly turning Created: 19/Mar/13  Updated: 11/Aug/24  Resolved: 17/Mar/21

Status: Resolved
Project: Minecraft: Java Edition
Component/s: None
Affects Version/s: Minecraft 1.5, Minecraft 1.6.1, Minecraft 1.6.2, Minecraft 1.7.4, Minecraft 14w27b, Minecraft 1.8, Minecraft 1.8.1-pre3, Minecraft 1.8.8, Minecraft 15w31c, Minecraft 15w35e, Minecraft 15w43a, Minecraft 15w46a, Minecraft 1.10.2, Minecraft 16w42a, Minecraft 1.12, Minecraft 1.12.1 Pre-Release 1, Minecraft 1.12.1, Minecraft 1.12.2, Minecraft 18w03b, Minecraft 18w10d, Minecraft 18w20c, Minecraft 1.13-pre2, Minecraft 1.13-pre3, Minecraft 1.13-pre8, Minecraft 1.13-pre9, Minecraft 1.13-pre10, Minecraft 1.13, Minecraft 18w30b, Minecraft 18w31a, Minecraft 18w32a, Minecraft 18w33a, Minecraft 1.13.1-pre1, Minecraft 1.13.1, Minecraft 1.13.2-pre1, Minecraft 1.13.2-pre2, Minecraft 1.13.2, Minecraft 18w43b, Minecraft 18w45a, Minecraft 18w46a, Minecraft 18w49a, Minecraft 19w02a, Minecraft 19w03a, Minecraft 19w05a, Minecraft 19w06a, Minecraft 19w07a, Minecraft 19w08a, Minecraft 19w09a, Minecraft 19w11a, Minecraft 19w11b, Minecraft 19w12b, Minecraft 19w13a, Minecraft 19w13b, Minecraft 19w14a, Minecraft 19w14b, Minecraft 1.14 Pre-Release 1, Minecraft 1.14 Pre-Release 2, Minecraft 1.14 Pre-Release 3, Minecraft 1.14 Pre-Release 4, Minecraft 1.14 Pre-Release 5, Minecraft 1.14, Minecraft 1.14.1, Minecraft 1.14.2 Pre-Release 1, Minecraft 1.14.2 Pre-Release 2, Minecraft 1.14.2, Minecraft 1.14.3 Pre-Release 2, Minecraft 1.14.3, Minecraft 1.14.4 Pre-Release 1, Minecraft 1.14.4 Pre-Release 3, Minecraft 1.14.4 Pre-Release 4, Minecraft 1.14.4 Pre-Release 5, Minecraft 1.14.4 Pre-Release 6, 1.14.4, 19w34a, 19w35a, 19w36a, 19w37a, 19w38b, 19w39a, 19w40a, 19w41a, 19w42a, 19w45b, 19w46b, 1.15 Pre-release 1, 1.15 Pre-Release 2, 1.15 Pre-release 3, 1.15 Pre-release 4, 1.15 Pre-release 5, 1.15 Pre-release 6, 1.15 Pre-release 7, 1.15, 1.15.1, 1.15.1 Pre-release 1, 1.15.2 Pre-Release 1, 1.15.2 Pre-release 2, 1.15.2, 20w06a, 20w07a, 20w08a, 20w09a, 20w10a, 20w11a, 20w12a, 20w13a, 20w13b, 20w14a, 20w15a, 20w17a, 20w18a, 20w19a, 20w20a, 20w20b, 20w21a, 20w22a, 1.16 Pre-release 1, 1.16 Pre-release 2, 1.16 Pre-release 3, 1.16 Pre-release 5, 1.16 Pre-release 6, 1.16 Pre-release 7, 1.16 Pre-release 8, 1.16 Release Candidate 1, 1.16, 1.16.1, 20w28a, 20w30a, 1.16.2 Pre-release 1, 1.16.2 Release Candidate 1, 1.16.2 Release Candidate 2, 1.16.2, 1.16.3 Release Candidate 1, 1.16.3, 1.16.4 Pre-release 1, 1.16.4 Pre-release 2, 1.16.4 Release Candidate 1, 1.16.4, 20w45a, 20w46a, 20w48a, 20w49a, 20w51a, 21w03a, 1.16.5, 21w05a, 21w05b, 21w06a, 21w07a, 21w08b, 21w10a
Fix Version/s: Minecraft 14w30c, 21w11a

Type: Bug
Reporter: [Mod] Avoma Assignee: [Mojang] Panda
Resolution: Fixed Votes: 138
Labels: bucket, desync, empty, lava, water

Attachments: PNG File 2018-08-31_11.56.14.png     PNG File 2018-08-31_11.56.24.png     PNG File 2020-06-18_17.23.47.png     PNG File 2020-12-07_09.48.56.png     PNG File 2021-06-12_13.18.47.png     JPEG File CEa9-rIWoAAT7YU.jpg     File Disappearance of water.mp4     File LiquidDesync.mp4     File MC-12363 not fixed..mp4     File Minecraft_bug.mp4     File PowderSnowBug.mp4     GIF File Water source pre8.gif     File lava block desync.mp4     File powder snow 20w48a.mp4     File powder snow entity 20w48a.mp4     File water desync.mp4     File water place item desync.mp4    
Issue Links:
Duplicate
is duplicated by MC-22377 Lava buckets in inventory randomly be... Resolved
is duplicated by MC-60815 Placing lava in water fast causes lav... Resolved
is duplicated by MC-84326 Buckets emptying with torches in shie... Resolved
is duplicated by MC-127133 Breathing bubbles flickering if in ai... Resolved
is duplicated by MC-127147 1x1 bubble created by bucket underwat... Resolved
is duplicated by MC-127233 Spamming buckets creates phantom air Resolved
is duplicated by MC-133539 Water does not fill empty spaces Resolved
is duplicated by MC-133550 Holes in water Resolved
is duplicated by MC-134139 Water does not refilled Resolved
is duplicated by MC-134343 When spam filling a water bucket wit... Resolved
is duplicated by MC-134714 Minor water bug Resolved
is duplicated by MC-134918 Source water blocks Resolved
is duplicated by MC-136140 "Water bubble" in water if you spam e... Resolved
is duplicated by MC-136623 ghost water blocks Resolved
is duplicated by MC-137083 Water Bug Resolved
is duplicated by MC-139568 water is empty Resolved
is duplicated by MC-140875 Picking up water very fast makes an "... Resolved
is duplicated by MC-141794 Water Bucket or waters glitch Resolved
is duplicated by MC-143878 Water is not flowing occasionally Resolved
is duplicated by MC-144219 Disappearing blocks and reappearing b... Resolved
is duplicated by MC-146039 Right click with bucket in the water ... Resolved
is duplicated by MC-146180 Water doesn't flow after using a bucket Resolved
is duplicated by MC-148261 water doesnt flow Resolved
is duplicated by MC-148288 Right clicking a bucket on a body of ... Resolved
is duplicated by MC-150162 There is a problem with water buckets... Resolved
is duplicated by MC-150863 air block in the middle of water Resolved
is duplicated by MC-151665 Water fails to be picked up and stays... Resolved
is duplicated by MC-153123 Water Pickup Bug Resolved
is duplicated by MC-157975 Picking water with buckets sometimes ... Resolved
is duplicated by MC-160166 Disappearing Water? Resolved
is duplicated by MC-160970 Blocks of water disappear Resolved
is duplicated by MC-161504 Infinite Water Bug Resolved
is duplicated by MC-162880 Man Made Air Pocket in Water Resolved
is duplicated by MC-166672 Water source block issue Resolved
is duplicated by MC-168506 Using buckets towards fish underwater... Resolved
is duplicated by MC-168953 When a water is placed with a water b... Resolved
is duplicated by MC-169081 Bucket falsely fills with water Resolved
is duplicated by MC-169119 Infinite water source doesn't replenish Resolved
is duplicated by MC-170369 Buckets cause water sources to disapp... Resolved
is duplicated by MC-170404 Water disapeared after placing down t... Resolved
is duplicated by MC-177039 Placing water quickly on grass makes ... Resolved
is duplicated by MC-177303 Lava in the buckets acts weird Resolved
is duplicated by MC-178363 Causes a air gap in water Resolved
is duplicated by MC-178416 Water Source Blocks are not being for... Resolved
is duplicated by MC-178492 Water/Bucket bug Resolved
is duplicated by MC-178709 Air block in water lake not filling in. Resolved
is duplicated by MC-181969 Picking up water or lava sometimes ca... Resolved
is duplicated by MC-182510 Water bug Resolved
is duplicated by MC-182713 Water gathering issue using Frost Wal... Resolved
is duplicated by MC-183993 Water does not flow properly/create n... Resolved
is duplicated by MC-184310 Water Buckets filling when they aren'... Resolved
is duplicated by MC-184584 invisible water Resolved
is duplicated by MC-187017 Invisible water issue Resolved
is duplicated by MC-187376 Air bubbles when clicking on water wi... Resolved
is duplicated by MC-187505 Lava not turning into obsidian in water. Resolved
is duplicated by MC-188016 Buckets Sometimes Doesn't Place The W... Resolved
is duplicated by MC-190185 Ghost Water or Lava Blocks Resolved
is duplicated by MC-190377 Sometimes water gets picked up in buc... Resolved
is duplicated by MC-190391 broken water mechanics Resolved
is duplicated by MC-191486 Item Disappearing when placed Resolved
is duplicated by MC-192405 Water Resolved
is duplicated by MC-195662 Water glitch Resolved
is duplicated by MC-196051 Water Randomly Disappears From Bucket Resolved
is duplicated by MC-196352 Water Update Glitch Resolved
is duplicated by MC-196546 Waterbucket displaying wrong ico Resolved
is duplicated by MC-196690 water air blocks Resolved
is duplicated by MC-198038 Water disappear (visual bug) Resolved
is duplicated by MC-198094 Inviseble water Resolved
is duplicated by MC-198704 Lava doesn't go away Resolved
is duplicated by MC-199800 Water Bug Resolved
is duplicated by MC-199963 Water bug Resolved
is duplicated by MC-200339 1 bucket + 2 clicks fast = 1 air 1 wa... Resolved
is duplicated by MC-200792 Picking up water and the code not reg... Resolved
is duplicated by MC-202085 Bug with Endless source of water on 1... Resolved
is duplicated by MC-202100 Weird water bucket behaviour Resolved
is duplicated by MC-202878 Ghost water buckets Resolved
is duplicated by MC-202897 Sometimes water and lava are not coll... Resolved
is duplicated by MC-203422 Water/lava client side cavity Resolved
is duplicated by MC-204250 Water source block deleted on rare oc... Resolved
is duplicated by MC-204517 Bucketing water too fast causes visua... Resolved
is duplicated by MC-204699 water replaces with air when filling ... Resolved
is duplicated by MC-204728 The water bucket has a chance of glit... Resolved
is duplicated by MC-205225 Attempting to pick up Powder Snow in ... Resolved
is duplicated by MC-205507 ghost water Resolved
is duplicated by MC-206511 You Can Create Fake Air Pockets By Fi... Resolved
is duplicated by MC-206537 Water and Lava Disappears Randomly Resolved
is duplicated by MC-206782 Water Bucket Glitches Resolved
is duplicated by MC-206882 Invisible water bug Resolved
is duplicated by MC-207166 water buckets doesnt work as propperly Resolved
is duplicated by MC-207990 Bucket bug Resolved
is duplicated by MC-208190 Invisible lava in 20w49a Resolved
is duplicated by MC-208414 Water bug Resolved
is duplicated by MC-209105 20w51a Issue (Axolotl) Resolved
is duplicated by MC-209179 Water doesnt dissapear (Bucket) Resolved
is duplicated by MC-209358 Water doesn't go in my bucket Resolved
is duplicated by MC-210157 Lava glitch Resolved
is duplicated by MC-210297 water buckets act wierdly Resolved
is duplicated by MC-210862 Buckets used at previous crosshair lo... Resolved
is duplicated by MC-211203 Water will sometimes appear in the bu... Resolved
is duplicated by MC-213453 Desynced water with buckets Resolved
is duplicated by MC-214247 Server-client desync when turning cam... Resolved
is duplicated by MC-214391 Water Bug Resolved
is duplicated by MC-214542 Water Glitch Resolved
is duplicated by MC-215523 water bug Resolved
is duplicated by MC-215572 Using a bucket underwater will pick u... Resolved
is duplicated by MC-216021 Spamming a bucket under water results... Resolved
is duplicated by MC-216069 Invisible lava source block?! Resolved
is duplicated by MC-216531 Water Physics Issue Resolved
is duplicated by MC-217438 Bug with water and bucket Resolved
is duplicated by MC-217508 Water stops updating? Resolved
is duplicated by MC-217598 Water glitch Resolved
is duplicated by MC-217744 water does not get picked up sometimes Resolved
is duplicated by MC-219644 When you fill a bucket with water whi... Resolved
is duplicated by MC-219801 Water Dissapearing When Placed Resolved
is duplicated by MC-222975 Water Bug Resolved
is duplicated by MC-223332 Fake lava bucket/ Ghost bucket Resolved
is duplicated by MC-231630 Water source doesent pick up when i... Resolved
Relates
relates to MC-95720 Client-server desync on seemingly inv... Open
relates to MC-189969 Taking away lava while it converts to... Open
relates to MC-210301 Desync when trying to use a bucket in... Open
relates to MC-9591 Players are able to create ghost lily... Resolved
relates to MC-90022 Movement packets arrive too late Resolved
relates to MC-107103 Trying to interact with entity 3 or m... Resolved
relates to MC-219875 You can cause a desync when repeatabl... Resolved
relates to MC-268282 Picking up lava, powder snow or water... Resolved
relates to MC-134622 You can breathe indefinitely underwat... Open
relates to MC-193187 Phantom Lava Source Block / Invisible... Resolved
CHK:
Confirmation Status: Confirmed
Game Mode: Survival
Category:
Block states, Networking
Mojang Priority: Important

 Description   

The bug

A desync can happen when rapidly turning and trying to use a lava, water, or powder snow bucket. The bucket might appear full but you placed lava / water / powder snow; or the bucket might appear empty but you did not place lava / water / powder snow.

How to reproduce

  1. Give yourself a lava bucket
  2. Spin around (move mouse) standing on a flat plain and repeatedly try to put down and pick up the lava in the bucket
    About 1 in 10 times, the client and server desync (e.g. I see the lava on the ground, and also in my bucket, until I use the bucket again or move it in my inventory; or I see no lava on the ground and my inventory displays the bucket as empty, but I actually still have lava and can place it).

Code analysis

Based on 1.12.2 decompiled using MCP 9.40

Using a bucket calls server-side net.minecraft.item.ItemBucket.onItemRightClick(World, EntityPlayer, EnumHand) which calculates the position itself and therefore can cause a desync. Ideally the position for picking up liquids and placing them should be calculated client-side only and then the server should only validate it and use that position.

Examples



 Comments   
Comment by Makzevu [ 12/Jun/21 ]

Are you experiencing MC-219875?

Comment by Marxalous [ 12/Jun/21 ]

Not fixed, Reproduced in 1.17

Comment by Makzevu [ 07/Jun/21 ]

This issue has been fixed in the 1.17 snapshots, and should be released alongside Caves and Cliffs: Part 1 on June 8th (in a little less than two days).

Comment by abdf233 [ 06/Jun/21 ]

I can confirm this happening on 1.16.5. In vanilla survival on a vanilla server.

Scenarios that can happen (from experience) that can be related to this:
1. 

2. Your water bucket looks full with water, but when you try to place it, your water disappears.

Comment by [Mojang] Panda [ 18/Mar/21 ]

Laurenss Yes, you are absolutely right, it should work like this. However it's not a simple change to do at the moment, as it has implications for how the offhand is handled, and the resulting changes have implications for modded servers.
The current fix is a small patch to avoid the most annoying part of the issue from showing up.

Comment by Laurens [ 18/Mar/21 ]

@panda4994 Why exactly are liquids calculated server-side? It would be much simpler to calculate it client-side and have the server validate it, just like the rest off the blocks. 

Comment by bugsbugsbugs [ 17/Mar/21 ]

New report is MC-219875

Comment by [Mojang] Panda [ 17/Mar/21 ]

bugsbugsbugs Thanks for testing! Impressive how fast you managed to break it
I was able to reproduce what you showed, though it turns out to be a different issue with a similar effect.
This report is about the desync when rapidly turning the camera (because the position and rotation server and client would simulate the right click action with could be mismatched), the other version you found happens when picking up two liquid blocks that are behind each other in close succession. It can be reproduced by having two water blocks with empty space behind them and then clicking two times with an empty bucket with roughly 250ms delay in between. LiquidDesync.mp4
This issue warrants a new report.

Comment by bugsbugsbugs [ 17/Mar/21 ]

It is not fully fixed in 21w11a, but it seems harder to reproduce now. MC-12363 not fixed..mp4

Comment by [Mod] Avoma [ 04/Mar/21 ]

I'd like to request ownership of this ticket since the reporter has been inactive since February 2018. I'm willing to keep this ticket updated and provided all of the necessary information.

Comment by [Mod] Avoma [ 25/Feb/21 ]

Can confirm in 21w08b.

Comment by [Mod] Avoma [ 18/Feb/21 ]

Can confirm in 21w07a.

Comment by Dan Atkinson [ 04/Feb/21 ]

I feel like this is from the bucket picking up two blocks of water/lava simultaneously then not filling in the gap that's left over, making the speed of picking up water less would still cause the bug but just less frequently

Comment by Neonturtle_2 [ 19/Jan/21 ]

Try making the max speed of picking up water less.

Comment by Laurens [ 16/Jan/21 ]

I wonder if they will ever fix this, it is marked as important and should be a simple fix

Comment by Ludmyna [ 16/Dec/20 ]

Confirmed in 20w51a

Comment by Neonturtle_2 [ 25/Nov/20 ]

Confirmed in 20w46a

Comment by [Mod] violine1101 [ 11/Nov/20 ]

Also affects powder snow buckets, see MC-205225

Comment by Falk Burger [ 27/Sep/20 ]

Just replicated this bug in the latest version (1.16.3). Saving and exiting the world then relaunching it fixes the holes in the water. With this you can theoritically make an empty pool on nothing and have a player drown in the air.

Comment by Dual Iron [ 23/Sep/20 ]

The eternal bug

Comment by [Mod] Chandler [ 02/Aug/20 ]

This is the original report? It was created in 2013

Comment by TuxMan [ 02/Aug/20 ]

Can't imagine this has never been reported, almost positive this is a duplicate.

Comment by Dual Iron [ 14/Jul/20 ]

Affects 1.16.2 snapshot 20w28a

Comment by bugsbugsbugs [ 12/Jun/20 ]

Affects 1.16 pre-release 5

Comment by CalXee [ 01/May/20 ]

Also affects multiplayer from my experience.

Comment by Jon1337 [ 21/Mar/20 ]

Affects 20w12a

Comment by Connor Steppie [ 13/Sep/19 ]

Relates to MC-9591

Comment by Jon1337 [ 04/Sep/19 ]

Still in 19w36a

Comment by [Helper] ZeNico13 [ 17/May/19 ]

Still in 1.14.2 Pre-Release 1 and 1.14.2 Pre-Release 2

Comment by [Helper] ZeNico13 [ 13/May/19 ]

Still in 1.14.1 Release

Comment by [Helper] ZeNico13 [ 23/Apr/19 ]

Still in 1.14 Release

Comment by [Helper] ZeNico13 [ 18/Apr/19 ]

Still in 1.14 pre-5

Comment by [Helper] ZeNico13 [ 18/Apr/19 ]

Still in 1.14 pre-3 and 1.14 pre-4

Comment by [Helper] ZeNico13 [ 12/Apr/19 ]

Still in 1.14 Pre-Release 2

Comment by [Helper] ZeNico13 [ 10/Apr/19 ]

Still in 1.14 Pre-Release 1

Comment by [Helper] ZeNico13 [ 03/Apr/19 ]

Still in 19w14a

Comment by [Helper] ZeNico13 [ 27/Mar/19 ]

Still in 19w13a

Comment by [Helper] ZeNico13 [ 22/Mar/19 ]

Still in 19w12b

Comment by [Helper] ZeNico13 [ 14/Mar/19 ]

Still in 19w11b

Comment by [Helper] ZeNico13 [ 13/Mar/19 ]

Still in 19w11a

Comment by [Helper] ZeNico13 [ 27/Feb/19 ]

Still in 19w09a

Comment by [Helper] ZeNico13 [ 20/Feb/19 ]

Still in 19w08a

Comment by [Helper] ZeNico13 [ 13/Feb/19 ]

Still in 19w07a

Comment by [Helper] ZeNico13 [ 06/Feb/19 ]

Still in 19w06a

Comment by [Helper] ZeNico13 [ 05/Feb/19 ]

Still in 19w05a

Comment by Valicon [ 05/Jan/19 ]

Why is there still a fixed version for a bug that was reopened ? Also, it can happen in creative too (not only in gamemode survival)

Comment by [Helper] ZeNico13 [ 25/Oct/18 ]

Still in 18w43b

Comment by [Helper] ZeNico13 [ 21/Oct/18 ]

Still in 1.13.2-pre2

Comment by [Helper] ZeNico13 [ 16/Oct/18 ]

Still in 1.13.2-pre1

Comment by Fibrowolf [ 31/Aug/18 ]

Ghost water blocks are still a thing in 1.13.1

Comment by [Helper] ZeNico13 [ 22/Aug/18 ]

Still in 1.13.1 release

Comment by [Helper] ZeNico13 [ 16/Aug/18 ]

Still in 1.13.1-pre1

Comment by [Helper] ZeNico13 [ 15/Aug/18 ]

Still in 18w33a

Comment by [Helper] ZeNico13 [ 08/Aug/18 ]

Still in 18w32a

Comment by [Helper] ZeNico13 [ 05/Aug/18 ]

Still in 18w31a

Comment by [Helper] ZeNico13 [ 27/Jul/18 ]

Still in 18w30b

Comment by [Mod] violine1101 [ 17/Jul/18 ]

Because this bug isn't being worked on right now.

Comment by [Helper] ZeNico13 [ 17/Jul/18 ]

Just a question : why no manager is still associated with this bug report?

Comment by [Helper] ZeNico13 [ 17/Jul/18 ]

@Marcono1234 Oh okay! Sorry

And also... Confirmed for 1.13-pre10!

Comment by Marcono1234 [ 17/Jul/18 ]

@ZeNico13, thank you very much, but there is no need to provide screenshots or gifs every time you confirm this bug. The now attached examples should be enough.

Comment by [Helper] ZeNico13 [ 16/Jul/18 ]

Confirmed for 1.13-pre9

Comment by [Helper] Lord_Quadrato [ 21/Jun/18 ]

Confirmed for 1.13-pre3

Comment by [Helper] Lord_Quadrato [ 16/Jun/18 ]

Confirmed for 1.13-pre2

Comment by [Helper] Lord_Quadrato [ 21/May/18 ]

Thank you, I did'nt know that

Comment by [Mod] violine1101 [ 21/May/18 ]

Lord_Quadrato, please write new comments (and delete your old ones if you want to keep the comment section clean) instead of just editing your latest comment. If you edit a comment, that's only visible to users that are watching the report, and doesn't appear in the activity feed.

Comment by [Helper] Lord_Quadrato [ 10/Mar/18 ]

Confirmed for 18w20c

Comment by Marcono1234 [ 21/Jan/18 ]

Happened to me with water as well, therefore I am going to change the report.

Comment by [Mod] violine1101 [ 17/Jan/18 ]

Gave the report to brianmcn.

Comment by Brian McNamara [ 17/Jan/18 ]

This is trivial to reproduce:

Give yourself a lava bucket. As you spin around (move mouse) standing on a flat plain, repeatedly try to put down and pick up the lava in the bucket. About 1 in 10 times, the client and server desync (e.g. I see the lava on the ground, and also in my bucket, until I use the bucket again or move it in my inventory; or I see no lava on the ground and my inventory displays the bucket as empty, but I actually still have lava and can place it).

(I just reproduced in in 18w02a)

Comment by Kuczora Tibor [ 16/Jan/18 ]

I am the Reporter, yes. I don't really play the game anymore so I can't tell, if it is still an issue or not.

If it's possible I give anyone the right who is currently active to modify the version.

Comment by [Mod] Michael Wobst [ 16/Jan/18 ]

Is this still an issue in the most recent versions (currently that is 1.12.2, or 18w02a) of Minecraft? If so, please update the affected versions and help us keeping this ticket updated from time to time. If you are the owner/reporter of this ticket, you can modify the affected version(s) yourself.

Comment by Jasga [ 21/Apr/17 ]

Here you go, did the same thing I did a year ago (but now on the latest snapshot ofc). The second test (placing water) behaved a bit different this time around. This is all on singleplayer, once again the higher your ping to a server, the more often this happens.

Comment by Meri Diana [ 21/Apr/17 ]

Can someone tell me reproduction steps with lava or water for the current snapshot version?
I tried several tests, but couldn't manage to reproduce it so far with lava or water. Someone said (in 2015) it seemed to occur more frequently with high ping, which messes badly in PvP of course, if this is still the case.

I only could reproduce it in 17w16b with milk (MC-107103) as demonstrated in MC-94008.

(Offer to overtake this bugpost for more frequent updating, in case it still occurs with water/lava in the newest snapshot.)

Comment by Blake Patches [ 28/Jul/16 ]

I can confirm that this issue is still occurring sporadically, playing on Minecraft 1.10.2. Yesterday I was able to carry lava around in buckets just fine, but for some reason when I tried to do it today I encountered this issue where I would fill the bucket with lava, and then I would walk a little ways and look down and see that the bucket is empty.

Comment by Jasga [ 16/Feb/16 ]

Made a quick video https://www.youtube.com/watch?v=GiCs20Rcn9Q

Can also be abused on servers https://www.youtube.com/watch?v=TMJefiUYleI

Comment by Brian McNamara [ 17/Jan/16 ]

MC-95720 has some useful demo/repro of possible de-sync conditions

Comment by Brian McNamara [ 08/Dec/15 ]

It sounds like possibly MC-94008 has some simple repro steps to reproduce this bug with milk, though I've not confirmed it.

Comment by Brian McNamara [ 12/Nov/15 ]

I can still reproduce this in SSP in 15w46a. A single bucket and a single lava source is enough; I just walked around constantly placing and the picking up the lava. After a minute, I ended up with a full bucket, but also lava flowing in front of me. Moving the bucket in my inventory cause the bucket to magically 'empty'. Simple client-server mismatch.

Comment by Damien Talbot [ 30/Aug/15 ]

This just happened to me today on the latest snapshot 15w35e - was quite happily filling buckets of lava from a deep underground pool got to the surface to find the bucket was empty when I tried to placer it in a chest, had been carrying it in my hand on the way up not in my inventory. Happened after 7 buckets of lava had been transported.

Comment by kbk [ 27/Jul/14 ]

Probably fixed. Spent 4 stacks of buckets in survival to drain a small lake - no bucket was considered empty by the game.

Comment by [Mod] Ezekiel (ezfe) [ 26/Jul/14 ]

Is this still a concern in the latest Minecraft version 14w30c? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

Comment by Kuczora Tibor [ 19/Mar/13 ]

Alright!
Thank you for your reply!

Comment by kbk [ 19/Mar/13 ]

This is an old bug and does not actually relate to doors.
Occasionally lava source blocks do not fill buckets correctly (serverside) and minecraft restates the faulty bucket (clientside) in your inventory as empty when you happen to update its item. If the item is in your hand it restates immediately after you use it (right click) even if you actually use something else like a door. Because you cannot stack full buckets, they also appear full in your inventory when (pseudo)filled. In this case your bucket will be restated when you try to move it in inventory.

Guide to reproduce:
1. Take 10-20 empty buckets to the lava source.
2. Quickly use them to drain as much source blocks as you can reach.
3. Try to move your lava buckets within your inventory or use them in any way. There is a chance some of them would reappear empty. Repeat if necessary.

Comment by Kuczora Tibor [ 19/Mar/13 ]

I hope somebody will response!

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