{ "expand": "operations,versionedRepresentations,editmeta,changelog,renderedFields", "id": "127888", "self": "https://bugs.mojang.com/rest/api/2/issue/127888", "key": "MC-93468", "fields": { "issuetype": "1", "project": "10400", "fixVersions": [ "16423", "16503" ], "resolution": "1", "customfield_12800": null, "customfield_10500": { "self": "https://bugs.mojang.com/rest/api/2/customFieldOption/10303", "value": "Confirmed", "id": "10303", "disabled": false }, "customfield_12602": [], "customfield_10501": null, "customfield_12601": null, "customfield_12604": null, "customfield_10701": "2017-09-11T14:27:00.000+0300", "customfield_12603": null, "customfield_12606": null, "customfield_10900": null, "customfield_12605": null, "customfield_12608": null, "resolutiondate": "2017-12-07T23:01:53.000+0200", "customfield_12607": null, "customfield_12609": null, "workratio": -1, "lastViewed": null, "watches": { "self": "https://bugs.mojang.com/rest/api/2/issue/MC-93468/watchers", "watchCount": 20, "isWatching": false }, "created": "2015-11-29T07:38:14.000+0200", "customfield_12000": null, "customfield_12200": null, "customfield_12201": null, "customfield_12600": null, "labels": [ "lava", "liquid", "randomTickSpeed", "water" ], "customfield_11700": "{}", "customfield_11901": null, "versions": [ "15419", "15518", "15519", "15522", "15525", "15623", "15630", "15640", "15659", "15669", "15722", "15724", "15728", "15908", "15910", "16012", "16204", "16206", "16212", "16218", "16220", "16224", "16227", "16228", "16229", "16231", "16232", "16237", "16239", "16302", "16305", "16424", "16437", "16438", "16452", "16457", "16459", "16462", "16463" ], "issuelinks": [ { "id": "107066", "self": "https://bugs.mojang.com/rest/api/2/issueLink/107066", "type": "10100", "inwardIssue": "180797" }, { "id": "92420", "self": "https://bugs.mojang.com/rest/api/2/issueLink/92420", "type": "10102", "inwardIssue": "150144" }, { "id": "107837", "self": "https://bugs.mojang.com/rest/api/2/issueLink/107837", "type": "10102", "inwardIssue": "183056" }, { "id": "173550", "self": "https://bugs.mojang.com/rest/api/2/issueLink/173550", "type": "10103", "outwardIssue": "17159" } ], "assignee": "grum", "updated": "2020-04-28T00:07:38.000+0300", "status": "5", "components": [], "description": "h3. The bug\nWhen a liquid gets randomly ticked, it flows. That seems strange, since flow should always be predictable. To illustrate this, here is a gif of this behavior with 300 random tick speed: http://gfycat.com/NiftyInnocentElver\nNotice the flow being uneven throughout, whereas a random tick speed of 0 is completely even:\nhttp://gfycat.com/PrestigiousAdorableBeardeddragon\n(Actually, there is a slight inconsistency to the right, but I believe that's a separate issue).\n\nh3. How to reproduce\nIn order to see the effects, run {{/gamerule randomTickSpeed 1000}} and place some water or lava. Note that this behavior can still happen at the default random tick speed, it's just unlikely and difficult to see.\n\nh3. Code analysis\nBy [~azelef] in this [comment|https://bugs.mojang.com/browse/MC-93468?focusedCommentId=307071&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-307071].", "customfield_11100": null, "customfield_11300": null, "customfield_11500": null, "customfield_12503": null, "customfield_12502": null, "customfield_12700": null, "customfield_12504": null, "attachment": [], "summary": "Water and lava flow affected by random ticks", "creator": "tryashtar", "reporter": "tryashtar", "customfield_10002": null, "customfield_12501": null, "customfield_12500": null, "customfield_11601": null, "customfield_11600": "0|i0mj0v:", "customfield_11801": null, "environment": null, "customfield_11800": null, "customfield_11602": null, "customfield_11802": null, "comment": { "comments": [ { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/269037", "id": "269037", "author": "redstonehelper", "body": "MEQS_TRIVIAL\nMEQS_WAI", "updateAuthor": "mustek", "created": "2015-11-29T16:45:41.935+0200", "updated": "2016-06-20T21:57:39.395+0300", "visibility": { "type": "group", "value": "staff" } }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/269038", "id": "269038", "author": "redstonehelper", "body": "Could have to do with how random ticks are used for lava decay.", "updateAuthor": "redstonehelper", "created": "2015-11-29T16:45:57.279+0200", "updated": "2015-11-29T16:45:57.279+0200" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/307071", "id": "307071", "author": "azelef", "body": "Can confirm for 1.9.4.\n\nHere is a fix (MCP names) :\n-Open BlockDynamicLiquid.java\n-Add \"this.setTickRandomly(false);\" to the constructor.\n\nThat's not very hard to figure out, so I see three possibilities :\n-Nobody reported this before\n-It works as intended\n-The devs are really lazy\n\n@redstonehelper :\nIs lava decay supposed to use random ticks ? If so, also add\nif (materialIn==Material.lava)\n\\{\\\\\n[REPLACE THIS WITH A TAB]this.setTickRandomly(true);\\\\\n}\nto the constructor to fix this bug for water, but keep it for lava.", "updateAuthor": "azelef", "created": "2016-05-24T20:07:30.412+0300", "updated": "2016-05-24T20:12:17.149+0300" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/315588", "id": "315588", "author": "schortan", "body": "Yeah, can confirm that for *1.10*, noticed it myself when doing some test.\n", "updateAuthor": "schortan", "created": "2016-06-22T00:04:57.287+0300", "updated": "2016-06-22T00:04:57.287+0300" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/331332", "id": "331332", "author": "gaspoweredpick", "body": "MC-93468 is caused by water sometimes generating extra blocks while flowing.", "updateAuthor": "gaspoweredpick", "created": "2016-09-28T01:01:31.464+0300", "updated": "2016-09-28T01:02:16.826+0300" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/340362", "id": "340362", "author": "ilmango", "body": "confirmed for 16w44a. \n\nI think everybody would like to see this fixed", "updateAuthor": "ilmango", "created": "2016-11-04T21:44:13.048+0200", "updated": "2016-11-04T21:44:13.048+0200" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/340516", "id": "340516", "author": "scudobuio", "body": "I should point out that removing random ticks from flowing liquids would also affect liquid dissipation. More specifically, it would slightly slow the already-relatively-slow dissipation, though it would make the rate more predictable (in which case it might make for some interesting medium-period clocks).", "updateAuthor": "scudobuio", "created": "2016-11-05T16:58:41.696+0200", "updated": "2016-11-05T16:58:41.696+0200" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/341355", "id": "341355", "author": "ilmango", "body": "The effect of the random ticks is almost negligible though. The effect is at least 100 times less than the predictable behaviour. I don't think it's worth keeping it, since the effect can't be observed anyway.", "updateAuthor": "ilmango", "created": "2016-11-07T21:28:36.485+0200", "updated": "2016-11-07T21:28:36.485+0200" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/355253", "id": "355253", "author": "schortan", "body": "Can confirm for 1.11.2", "updateAuthor": "schortan", "created": "2017-01-21T14:39:25.004+0200", "updated": "2017-01-21T14:39:25.004+0200" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/390092", "id": "390092", "author": "suncat", "body": "MEQS_CODE", "updateAuthor": "suncat", "created": "2017-06-22T01:08:32.982+0300", "updated": "2017-06-22T01:08:32.982+0300", "visibility": { "type": "group", "value": "staff" } }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/406346", "id": "406346", "author": "bidws", "body": "If it's intended for liquid DISSAPATING, then you can change code like this: don't generate water when ticked, remove it instand when needed.", "updateAuthor": "bidws", "created": "2017-09-11T13:58:54.294+0300", "updated": "2017-09-11T13:58:54.294+0300" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/406570", "id": "406570", "author": "miwob", "body": "Should be fixed in 1.12.2 pre-1. Please check if it's fixed as expected.", "updateAuthor": "miwob", "created": "2017-09-13T20:28:39.373+0300", "updated": "2017-09-13T20:28:39.373+0300" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/406641", "id": "406641", "author": "tryashtar", "body": "Confirmed fixed! Thanks!", "updateAuthor": "tryashtar", "created": "2017-09-14T01:13:53.958+0300", "updated": "2017-09-14T01:13:53.958+0300" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/407159", "id": "407159", "author": "JIRAUSER71590", "body": "Fix got reverted.", "updateAuthor": "JIRAUSER71590", "created": "2017-09-18T13:30:04.690+0300", "updated": "2017-09-18T13:30:04.690+0300" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/407172", "id": "407172", "author": "ilmango", "body": "why was it reverted?", "updateAuthor": "ilmango", "created": "2017-09-18T18:44:53.842+0300", "updated": "2017-09-18T18:44:53.842+0300" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/407174", "id": "407174", "author": "JIRAUSER71590", "body": "Because of MC-120709, it isn't as simple to fix without delaying 1.12.2's security issue fix for too long.", "updateAuthor": "JIRAUSER71590", "created": "2017-09-18T18:50:17.202+0300", "updated": "2017-09-18T18:50:17.202+0300" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/407275", "id": "407275", "author": "toboe_irbis", "body": "@Grum: You can disable random tick for water/lava that already updated within last 7(water) or 30(lava) ticks. Something similar was made for turning on redstone torches - random tick will not turn it faster even if burned out redstone torch can be turned on by random tick.", "updateAuthor": "toboe_irbis", "created": "2017-09-19T13:37:20.299+0300", "updated": "2017-09-19T13:37:20.299+0300" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/422562", "id": "422562", "author": "ghomaghity", "body": "Nice, in the latest snapshot 17w50a it has been fixed. I don't know if that is going to stay but I hope it does.", "updateAuthor": "ghomaghity", "created": "2017-12-11T18:53:18.767+0200", "updated": "2017-12-11T18:53:18.767+0200" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/422570", "id": "422570", "author": "grootweare", "body": "[MC-120709|https://bugs.mojang.com/browse/MC-120709] got fixed as well in this snapshot, so there's no reason this fix shouldn't stay", "updateAuthor": "grootweare", "created": "2017-12-11T19:20:43.984+0200", "updated": "2017-12-11T19:20:43.984+0200" }, { "self": "https://bugs.mojang.com/rest/api/2/issue/127888/comment/440183", "id": "440183", "author": "tryashtar", "body": "The asymmetrical flow also appears to be fixed as of 18w10c.", "updateAuthor": "tryashtar", "created": "2018-03-08T21:35:46.177+0200", "updated": "2018-03-08T21:35:46.177+0200" } ], "maxResults": 20, "total": 20, "startAt": 0 }, "votes": { "self": "https://bugs.mojang.com/rest/api/2/issue/MC-93468/votes", "votes": 55, "hasVoted": false } }, "changelog": { "startAt": 0, "maxResults": 60, "total": 60, "histories": [ { "id": "565086", "author": "tryashtar", "created": "2016-02-20T07:09:11.920+0200", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "15518", "toString": "Minecraft 1.9 Pre-Release 2" } ] }, { "id": "568933", "author": "tryashtar", "created": "2016-02-28T06:54:44.882+0200", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "15522", "toString": "Minecraft 1.9 Pre-Release 4" }, { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "15519", "toString": "Minecraft 1.9 Pre-Release 3" } ] }, { "id": "569692", "author": "redstonehelper", "created": "2016-02-29T17:26:33.011+0200", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "15525", "toString": "Minecraft 1.9" } ] }, { "id": "599124", "author": "kumasasa", "created": "2016-05-26T02:09:40.747+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "15623", "toString": "Minecraft 1.9.4" } ] }, { "id": "599125", "author": "kumasasa", "created": "2016-05-26T02:10:42.511+0300", "items": [ { "field": "description", "fieldtype": "jira", "from": null, "fromString": "I'm fairly certain this also happens in 1.8, but I haven't tested it.\n\nBasically, water flow changes when random tick speed is higher. When water gets randomly ticked, it flows. That seems strange, since water flow should always be predictable.\n\nTo illustrate this, here is a gif of this behavior with 300 random tick speed: http://gfycat.com/NiftyInnocentElver\n\nNotice the flow being uneven throughout, whereas a random tick speed of 0 is completely even:\nhttp://gfycat.com/PrestigiousAdorableBeardeddragon\n(Actually, there is a slight inconsistency to the right, but I believe that's a separate issue).\n\nThe point is, this means water can suddenly flow too far in one tick if it is randomly ticked, even at the default random tick speed of 3. This is rather inconsistent and weird.", "to": null, "toString": "I'm fairly certain this also happens in 1.8, but I haven't tested it.\n\nBasically, water flow changes when random tick speed is higher. When water gets randomly ticked, it flows. That seems strange, since water flow should always be predictable.\n\nTo illustrate this, here is a gif of this behavior with 300 random tick speed: http://gfycat.com/NiftyInnocentElver\n\nNotice the flow being uneven throughout, whereas a random tick speed of 0 is completely even:\nhttp://gfycat.com/PrestigiousAdorableBeardeddragon\n(Actually, there is a slight inconsistency to the right, but I believe that's a separate issue).\n\nThe point is, this means water can suddenly flow too far in one tick if it is randomly ticked, even at the default random tick speed of 3. This is rather inconsistent and weird.\n----\nCode analysys by [~azelef] in this [comment|]" } ] }, { "id": "599126", "author": "kumasasa", "created": "2016-05-26T02:10:52.842+0300", "items": [ { "field": "description", "fieldtype": "jira", "from": null, "fromString": "I'm fairly certain this also happens in 1.8, but I haven't tested it.\n\nBasically, water flow changes when random tick speed is higher. When water gets randomly ticked, it flows. That seems strange, since water flow should always be predictable.\n\nTo illustrate this, here is a gif of this behavior with 300 random tick speed: http://gfycat.com/NiftyInnocentElver\n\nNotice the flow being uneven throughout, whereas a random tick speed of 0 is completely even:\nhttp://gfycat.com/PrestigiousAdorableBeardeddragon\n(Actually, there is a slight inconsistency to the right, but I believe that's a separate issue).\n\nThe point is, this means water can suddenly flow too far in one tick if it is randomly ticked, even at the default random tick speed of 3. This is rather inconsistent and weird.\n----\nCode analysys by [~azelef] in this [comment|]", "to": null, "toString": "I'm fairly certain this also happens in 1.8, but I haven't tested it.\n\nBasically, water flow changes when random tick speed is higher. When water gets randomly ticked, it flows. That seems strange, since water flow should always be predictable.\n\nTo illustrate this, here is a gif of this behavior with 300 random tick speed: http://gfycat.com/NiftyInnocentElver\n\nNotice the flow being uneven throughout, whereas a random tick speed of 0 is completely even:\nhttp://gfycat.com/PrestigiousAdorableBeardeddragon\n(Actually, there is a slight inconsistency to the right, but I believe that's a separate issue).\n\nThe point is, this means water can suddenly flow too far in one tick if it is randomly ticked, even at the default random tick speed of 3. This is rather inconsistent and weird.\n----\nCode analysys by [~azelef] in this [comment|https://bugs.mojang.com/browse/MC-93468?focusedCommentId=307071&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-307071]" } ] }, { "id": "599127", "author": "kumasasa", "created": "2016-05-26T02:11:05.638+0300", "items": [ { "field": "description", "fieldtype": "jira", "from": null, "fromString": "I'm fairly certain this also happens in 1.8, but I haven't tested it.\n\nBasically, water flow changes when random tick speed is higher. When water gets randomly ticked, it flows. That seems strange, since water flow should always be predictable.\n\nTo illustrate this, here is a gif of this behavior with 300 random tick speed: http://gfycat.com/NiftyInnocentElver\n\nNotice the flow being uneven throughout, whereas a random tick speed of 0 is completely even:\nhttp://gfycat.com/PrestigiousAdorableBeardeddragon\n(Actually, there is a slight inconsistency to the right, but I believe that's a separate issue).\n\nThe point is, this means water can suddenly flow too far in one tick if it is randomly ticked, even at the default random tick speed of 3. This is rather inconsistent and weird.\n----\nCode analysys by [~azelef] in this [comment|https://bugs.mojang.com/browse/MC-93468?focusedCommentId=307071&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-307071]", "to": null, "toString": "I'm fairly certain this also happens in 1.8, but I haven't tested it.\n\nBasically, water flow changes when random tick speed is higher. When water gets randomly ticked, it flows. That seems strange, since water flow should always be predictable.\n\nTo illustrate this, here is a gif of this behavior with 300 random tick speed: http://gfycat.com/NiftyInnocentElver\n\nNotice the flow being uneven throughout, whereas a random tick speed of 0 is completely even:\nhttp://gfycat.com/PrestigiousAdorableBeardeddragon\n(Actually, there is a slight inconsistency to the right, but I believe that's a separate issue).\n\nThe point is, this means water can suddenly flow too far in one tick if it is randomly ticked, even at the default random tick speed of 3. This is rather inconsistent and weird.\n----\nCode analysis by [~azelef] in this [comment|https://bugs.mojang.com/browse/MC-93468?focusedCommentId=307071&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-307071]" } ] }, { "id": "613752", "author": "redstonehelper", "created": "2016-06-22T21:44:22.888+0300", "items": [ { "field": "Confirmation Status", "fieldtype": "custom", "from": "10300", "fromString": "Unconfirmed", "to": "10302", "toString": "Community Consensus" }, { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "15630", "toString": "Minecraft 1.10" }, { "field": "status", "fieldtype": "jira", "from": "1", "fromString": "Open", "to": "1", "toString": "Open" } ] }, { "id": "613753", "author": "mustek2", "created": "2016-06-22T21:44:37.554+0300", "items": [ { "field": "CHK", "fieldtype": "custom", "from": null, "fromString": null, "to": "2016-06-22T20:44+0200", "toString": "22/Jun/16 8:44 PM" }, { "field": "status", "fieldtype": "jira", "from": "1", "fromString": "Open", "to": "1", "toString": "Open" } ] }, { "id": "619728", "author": "tryashtar", "created": "2016-07-07T03:51:17.350+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "15640", "toString": "Minecraft 1.10.2" } ] }, { "id": "632185", "author": "tryashtar", "created": "2016-08-27T19:38:49.253+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "15659", "toString": "Minecraft 16w33a" }, { "field": "summary", "fieldtype": "jira", "from": null, "fromString": "Water flow affected by random ticks", "to": null, "toString": "Water and lava flow affected by random ticks" } ] }, { "id": "638608", "author": "tryashtar", "created": "2016-09-21T01:34:43.929+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "15669", "toString": "Minecraft 16w38a" } ] }, { "id": "639949", "author": "neko", "created": "2016-09-27T14:02:47.353+0300", "items": [ { "field": "Link", "fieldtype": "jira", "from": null, "fromString": null, "to": "MC-107354", "toString": "This issue is duplicated by MC-107354" } ] }, { "id": "659637", "author": "suncat", "created": "2016-11-04T21:53:07.451+0200", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "15722", "toString": "Minecraft 16w44a" } ] }, { "id": "663214", "author": "tryashtar", "created": "2016-11-13T06:36:27.738+0200", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "15724", "toString": "Minecraft 1.11 Pre-Release 1" } ] }, { "id": "669666", "author": "tryashtar", "created": "2016-11-24T01:35:22.370+0200", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "15728", "toString": "Minecraft 1.11" } ] }, { "id": "682346", "author": "tryashtar", "created": "2017-01-02T03:43:02.127+0200", "items": [ { "field": "labels", "fieldtype": "jira", "from": null, "fromString": "", "to": null, "toString": "lava liquid randomTickSpeed water" } ] }, { "id": "688448", "author": "suncat", "created": "2017-01-21T14:42:50.485+0200", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "15908", "toString": "Minecraft 1.11.2" } ] }, { "id": "717482", "author": "tryashtar", "created": "2017-03-20T23:27:09.547+0200", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "15910", "toString": "Minecraft 17w06a" } ] }, { "id": "721940", "author": "tryashtar", "created": "2017-03-31T03:51:23.743+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16012", "toString": "Minecraft 17w13a" } ] }, { "id": "725371", "author": "tryashtar", "created": "2017-04-05T21:47:39.836+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16204", "toString": "Minecraft 17w14a" } ] }, { "id": "729863", "author": "tryashtar", "created": "2017-04-13T03:41:09.716+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16206", "toString": "Minecraft 17w15a" } ] }, { "id": "733722", "author": "tryashtar", "created": "2017-04-21T01:49:38.903+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16212", "toString": "Minecraft 17w16a" } ] }, { "id": "734973", "author": "tryashtar", "created": "2017-04-22T05:59:34.395+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16218", "toString": "Minecraft 17w16b" } ] }, { "id": "742535", "author": "tryashtar", "created": "2017-04-27T02:24:09.100+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16220", "toString": "Minecraft 17w17a" } ] }, { "id": "745022", "author": "tryashtar", "created": "2017-04-30T08:28:36.986+0300", "items": [ { "field": "description", "fieldtype": "jira", "from": null, "fromString": "I'm fairly certain this also happens in 1.8, but I haven't tested it.\n\nBasically, water flow changes when random tick speed is higher. When water gets randomly ticked, it flows. That seems strange, since water flow should always be predictable.\n\nTo illustrate this, here is a gif of this behavior with 300 random tick speed: http://gfycat.com/NiftyInnocentElver\n\nNotice the flow being uneven throughout, whereas a random tick speed of 0 is completely even:\nhttp://gfycat.com/PrestigiousAdorableBeardeddragon\n(Actually, there is a slight inconsistency to the right, but I believe that's a separate issue).\n\nThe point is, this means water can suddenly flow too far in one tick if it is randomly ticked, even at the default random tick speed of 3. This is rather inconsistent and weird.\n----\nCode analysis by [~azelef] in this [comment|https://bugs.mojang.com/browse/MC-93468?focusedCommentId=307071&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-307071]", "to": null, "toString": "When water gets randomly ticked, it flows. That seems strange, since water flow should always be predictable.\n\nTo illustrate this, here is a gif of this behavior with 300 random tick speed: http://gfycat.com/NiftyInnocentElver\n\nNotice the flow being uneven throughout, whereas a random tick speed of 0 is completely even:\nhttp://gfycat.com/PrestigiousAdorableBeardeddragon\n(Actually, there is a slight inconsistency to the right, but I believe that's a separate issue).\n\nThe point is, this means water can suddenly flow too far in one tick if it is randomly ticked, even at the default random tick speed of 3. This is rather inconsistent and weird.\n----\nCode analysis by [~azelef] in this [comment|https://bugs.mojang.com/browse/MC-93468?focusedCommentId=307071&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-307071]" } ] }, { "id": "749452", "author": "tryashtar", "created": "2017-05-04T02:17:54.803+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16227", "toString": "Minecraft 17w18a" }, { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16224", "toString": "Minecraft 17w17b" } ] }, { "id": "750630", "author": "tryashtar", "created": "2017-05-05T00:46:29.784+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16228", "toString": "Minecraft 17w18b" } ] }, { "id": "757446", "author": "tryashtar", "created": "2017-05-17T01:24:26.626+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16231", "toString": "Minecraft 1.12 Pre-Release 2" }, { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16229", "toString": "Minecraft 1.12 Pre-Release 1" } ] }, { "id": "757973", "author": "tryashtar", "created": "2017-05-18T01:04:57.293+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16232", "toString": "Minecraft 1.12 Pre-Release 3" } ] }, { "id": "759675", "author": "tryashtar", "created": "2017-05-21T06:16:41.836+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16237", "toString": "Minecraft 1.12 Pre-Release 5" } ] }, { "id": "762662", "author": "tryashtar", "created": "2017-05-30T08:13:55.009+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16239", "toString": "Minecraft 1.12 Pre-Release 6" } ] }, { "id": "764803", "author": "tryashtar", "created": "2017-06-02T23:39:45.199+0300", "items": [ { "field": "description", "fieldtype": "jira", "from": null, "fromString": "When water gets randomly ticked, it flows. That seems strange, since water flow should always be predictable.\n\nTo illustrate this, here is a gif of this behavior with 300 random tick speed: http://gfycat.com/NiftyInnocentElver\n\nNotice the flow being uneven throughout, whereas a random tick speed of 0 is completely even:\nhttp://gfycat.com/PrestigiousAdorableBeardeddragon\n(Actually, there is a slight inconsistency to the right, but I believe that's a separate issue).\n\nThe point is, this means water can suddenly flow too far in one tick if it is randomly ticked, even at the default random tick speed of 3. This is rather inconsistent and weird.\n----\nCode analysis by [~azelef] in this [comment|https://bugs.mojang.com/browse/MC-93468?focusedCommentId=307071&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-307071]", "to": null, "toString": "h3. The bug\nWhen a liquid gets randomly ticked, it flows. That seems strange, since flow should always be predictable. To illustrate this, here is a gif of this behavior with 300 random tick speed: http://gfycat.com/NiftyInnocentElver\nNotice the flow being uneven throughout, whereas a random tick speed of 0 is completely even:\nhttp://gfycat.com/PrestigiousAdorableBeardeddragon\n(Actually, there is a slight inconsistency to the right, but I believe that's a separate issue).\n\nh3. How to reproduce\nIn order to see the effects, run {{/gamerule randomTickSpeed 1000}} and place some water or lava. Note that this behavior can still happen at the default random tick speed, it's just unlikely and difficult to see.\n\nh3. Code analysis\nBy [~azelef] in this [comment|https://bugs.mojang.com/browse/MC-93468?focusedCommentId=307071&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-307071]." } ] }, { "id": "764824", "author": "tryashtar", "created": "2017-06-03T00:08:43.965+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16302", "toString": "Minecraft 1.12 Pre-Release 7" } ] }, { "id": "769660", "author": "tryashtar", "created": "2017-06-12T20:30:57.171+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16305", "toString": "Minecraft 1.12" } ] }, { "id": "790058", "author": "tryashtar", "created": "2017-08-13T22:38:41.495+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16424", "toString": "Minecraft 1.12.1" } ] }, { "id": "801441", "author": "bemoty", "created": "2017-09-11T14:27:16.276+0300", "items": [ { "field": "CHK", "fieldtype": "custom", "from": "2016-06-22T20:44:00+0200", "fromString": "22/Jun/16 8:44 PM", "to": "2017-09-11T13:27:00+0200", "toString": "11/Sep/17 1:27 PM" }, { "field": "Confirmation Status", "fieldtype": "custom", "from": "10302", "fromString": "Community Consensus", "to": "10303", "toString": "Confirmed" }, { "field": "status", "fieldtype": "jira", "from": "1", "fromString": "Open", "to": "1", "toString": "Open" } ] }, { "id": "801851", "author": "JIRAUSER71590", "created": "2017-09-13T20:02:33.506+0300", "items": [ { "field": "Fix Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16423", "toString": "Future Version - 1.13+" }, { "field": "assignee", "fieldtype": "jira", "from": null, "fromString": null, "to": "grum", "toString": "[Mojang] Grum (Erik Broes)" }, { "field": "resolution", "fieldtype": "jira", "from": null, "fromString": null, "to": "1", "toString": "Fixed" }, { "field": "status", "fieldtype": "jira", "from": "1", "fromString": "Open", "to": "5", "toString": "Resolved" } ] }, { "id": "801880", "author": "miwob", "created": "2017-09-13T20:47:53.800+0300", "items": [ { "field": "Fix Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16436", "toString": "Minecraft 1.12.2 Pre-Release 1" }, { "field": "Fix Version", "fieldtype": "jira", "from": "16423", "fromString": "Future Version - 1.13+", "to": null, "toString": null }, { "field": "status", "fieldtype": "jira", "from": "5", "fromString": "Resolved", "to": "5", "toString": "Resolved" } ] }, { "id": "802157", "author": "pokechu22", "created": "2017-09-13T22:25:23.949+0300", "items": [ { "field": "Fix Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16423", "toString": "Minecraft 1.12.2 Pre-Release 1" }, { "field": "Fix Version", "fieldtype": "jira", "from": "16436", "fromString": "Future Version - 1.13+", "to": null, "toString": null }, { "field": "status", "fieldtype": "jira", "from": "5", "fromString": "Resolved", "to": "5", "toString": "Resolved" } ] }, { "id": "803140", "author": "pokechu22", "created": "2017-09-16T22:13:25.797+0300", "items": [ { "field": "Link", "fieldtype": "jira", "from": null, "fromString": null, "to": "MC-120709", "toString": "This issue relates to MC-120709" } ] }, { "id": "803463", "author": "JIRAUSER71590", "created": "2017-09-18T13:30:05.532+0300", "items": [ { "field": "resolution", "fieldtype": "jira", "from": "1", "fromString": "Fixed", "to": null, "toString": null }, { "field": "status", "fieldtype": "jira", "from": "5", "fromString": "Resolved", "to": "4", "toString": "Reopened" } ] }, { "id": "803465", "author": "JIRAUSER71590", "created": "2017-09-18T13:46:24.738+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16437", "toString": "Minecraft 1.12.2" } ] }, { "id": "803590", "author": "pokechu22", "created": "2017-09-18T19:26:43.945+0300", "items": [ { "field": "Link", "fieldtype": "jira", "from": "MC-120709", "fromString": "This issue relates to MC-120709", "to": null, "toString": null } ] }, { "id": "803592", "author": "pokechu22", "created": "2017-09-18T19:27:02.917+0300", "items": [ { "field": "Link", "fieldtype": "jira", "from": null, "fromString": null, "to": "MC-120709", "toString": "This issue is blocked by MC-120709" } ] }, { "id": "803783", "author": "xcom6000", "created": "2017-09-19T10:38:42.774+0300", "items": [ { "field": "Attachment", "fieldtype": "jira", "from": null, "fromString": null, "to": "147167", "toString": "2017-09-19_09.37.49.png" } ] }, { "id": "803785", "author": "xcom6000", "created": "2017-09-19T11:02:56.800+0300", "items": [ { "field": "Attachment", "fieldtype": "jira", "from": "147167", "fromString": "2017-09-19_09.37.49.png", "to": null, "toString": null } ] }, { "id": "803786", "author": "xcom6000", "created": "2017-09-19T11:03:00.808+0300", "items": [ { "field": "Comment", "fieldtype": "jira", "from": "In the image 2017-09-19_09.37.49.png is a proposed fix for this bug.\nRandom ticks are set to zero and the lava + water generated as per normal.\n\nThe fix can be found in WorldServer.java\nThere is a code that is used for instantly updating or rather instantly running scheduled updates in the code. When its used it generates water instantly when a chunk is populated. The instant updates have a check to see if an area around 8 blocks in all directions is loaded. This check prevents the water to flow naturally and causes the water to stop spreading towards unloaded chunks. When this happens the water stops spreading and looks like it's been stopped by a invisible barrier. In other instances it sporadically spreads, most likely because more neighbouring chunk loaded in while it was spreading and randomly selected water blocks had already spread while the neighbouring chunk loaded giving a sporadic shape.\n\nThe simple fix to this is to remove the check where a loaded chunk is needed for the scheduled updates to happen instantly. Removing it will give water the naturally generated shape, the same goes for lava. After removing the if statement that prevents instant updates near unloaded chunks the water generation stopped creating error waters. The picture is of the seed and the coordinate of where error water have been spotted.\n\nA picture of what was changed in the code:\nhttps://i.imgur.com/7jiNzbW.png\n\nAn hour of flying in spectator mode into newly generated chunk gave good results with no noticeable error water generation. But as of writing this there was no noticeable errors caused by this change. If anyone else can test this fix and report any other issues caused by removing this check. It's pointing towards having no side effects removing this particular loaded chunks check during instant scheduled updates.", "fromString": null, "to": null, "toString": null } ] }, { "id": "810656", "author": "violine1101", "created": "2017-10-08T19:30:00.881+0300", "items": [ { "field": "Link", "fieldtype": "jira", "from": null, "fromString": null, "to": "MC-121053", "toString": "This issue is duplicated by MC-121053" } ] }, { "id": "814978", "author": "tryashtar", "created": "2017-10-26T00:20:10.928+0300", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16438", "toString": "Minecraft 17w43a" } ] }, { "id": "819777", "author": "tryashtar", "created": "2017-11-09T06:28:13.702+0200", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16452", "toString": "Minecraft 17w45a" } ] }, { "id": "822555", "author": "tryashtar", "created": "2017-11-16T02:43:01.854+0200", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16457", "toString": "Minecraft 17w46a" } ] }, { "id": "824698", "author": "tryashtar", "created": "2017-11-22T21:42:46.603+0200", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16459", "toString": "Minecraft 17w47a" } ] }, { "id": "827883", "author": "tryashtar", "created": "2017-11-27T18:51:36.146+0200", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16462", "toString": "Minecraft 17w48a" } ] }, { "id": "830968", "author": "tryashtar", "created": "2017-12-06T17:44:54.700+0200", "items": [ { "field": "Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16463", "toString": "Minecraft 17w49a" } ] }, { "id": "831726", "author": "JIRAUSER71590", "created": "2017-12-07T23:01:53.959+0200", "items": [ { "field": "Fix Version", "fieldtype": "jira", "from": null, "fromString": null, "to": "16503", "toString": "Future Version - 1.13+" }, { "field": "resolution", "fieldtype": "jira", "from": null, "fromString": null, "to": "1", "toString": "Fixed" }, { "field": "status", "fieldtype": "jira", "from": "4", "fromString": "Reopened", "to": "5", "toString": "Resolved" } ] }, { "id": "833327", "author": "neko", "created": "2017-12-11T23:51:49.339+0200", "items": [ { "field": "Link", "fieldtype": "jira", "from": null, "fromString": null, "to": "MC-123150", "toString": "This issue relates to MC-123150" } ] }, { "id": "833525", "author": "JIRAUSER71590", "created": "2017-12-12T11:21:26.934+0200", "items": [ { "field": "Link", "fieldtype": "jira", "from": "MC-123150", "fromString": "This issue relates to MC-123150", "to": null, "toString": null } ] }, { "id": "1240898", "author": "dinnerbone", "created": "2019-06-04T22:45:53.430+0300", "items": [ { "field": "Workflow", "fieldtype": "jira", "from": "149934", "fromString": "Global Mojang Workflow", "to": "376688", "toString": "Java Workflow" } ] }, { "id": "1545212", "author": "pokechu22", "created": "2020-04-28T00:07:38.951+0300", "items": [ { "field": "Link", "fieldtype": "jira", "from": null, "fromString": null, "to": "MC-4631", "toString": "This issue relates to MC-4631" } ] } ] } }