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Bug
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Resolution: Duplicate
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None
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Minecraft 1.8.1, Minecraft 1.8.2-pre1
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None
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Confirmed
Moderator Edit:
After patch 1.8.1 certain nether portals will become desynched when multiple entities or players pass through them. If two players pass through a portal in rapid succession they will enter into the nether at an unrelated, unlinked portal, however if they pause for a few seconds between entering the portal they will arrive in the nether at the correct portal. Occasionally full client-desynch on multiplayer will occur, causing chunks around the client entering the overworld from the nether, not to load requiring client reconnect.
These portals have been in place for a long time and no additional portals have been built nearby to interfere, and are not within range to create a dual-destination portal. This behavior was not observable in 1.8, but can be observed in 1.8.1.
After patch 1.8.1 a specific nether portal stopped working in my world which kicks everyone off the server when 2 or more mobs enter the portal. In addition to that, if you throw any item through the portal and then go through said portal, the portal takes you to a completely unconnected nether portal far away. Also, if you throw two items into the nether portal, one at a time, it kicks everyone off the server and gives the "server closed" error. However, if you do not throw anything through this specific nether portal, it takes you to the correct place. I haven't touched these portals in over a month and it all started on Nov. 24th. after the 1.8.1 patch. I cannot give you a crash report, only logs because I and everyone else keep getting kicked off the server when 2 or more mobs go through it, the game doesn't crash but there is definitely a bug. The portal is used for a mob farm. I cannot recreate any of these results with any other portals in my world. It is only this specific portal. The portal is connected correctly, I know how all of the nether portal linking mechanics work and they all worked perfectly until 1.8.1 and I have no clue as to why this is happening nor how to fix it.
Here is a crash report of this world copied into a single player world from my minecraft realm server. The problems still occur in my single player as they do in multiplayer server.
---- Minecraft Crash Report ---- // Ouch. That hurt :( Time: 11/30/14 10:22 PM Description: Ticking entity java.lang.NullPointerException: Ticking entity at ayv.f(SourceFile:263) at are.b(SourceFile:123) at are.a(SourceFile:59) at sp.a(SourceFile:514) at wx.c(SourceFile:1749) at wx.K(SourceFile:303) at xo.K(SourceFile:176) at xq.K(SourceFile:157) at wx.t_(SourceFile:266) at xo.t_(SourceFile:1265) at xq.t_(SourceFile:211) at afm.t_(SourceFile:32) at aqr.a(SourceFile:1407) at qu.a(SourceFile:600) at aqr.g(SourceFile:1385) at aqr.i(SourceFile:1278) at qu.i(SourceFile:478) at net.minecraft.server.MinecraftServer.A(SourceFile:608) at net.minecraft.server.MinecraftServer.z(SourceFile:532) at cyk.z(SourceFile:155) at net.minecraft.server.MinecraftServer.run(SourceFile:448) at java.lang.Thread.run(Unknown Source) A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- Head -- Stacktrace: at ayv.f(SourceFile:263) at are.b(SourceFile:123) at are.a(SourceFile:59) at sp.a(SourceFile:514) at wx.c(SourceFile:1749) at wx.K(SourceFile:303) at xo.K(SourceFile:176) at xq.K(SourceFile:157) at wx.t_(SourceFile:266) at xo.t_(SourceFile:1265) at xq.t_(SourceFile:211) at afm.t_(SourceFile:32) at aqr.a(SourceFile:1407) at qu.a(SourceFile:600) at aqr.g(SourceFile:1385) -- Entity being ticked -- Details: Entity Type: Guardian (afg) Entity ID: 108683 Entity Name: Guardian Entity's Exact location: 202.00, 24.00, 288.00 Entity's Block location: 202.00,24.00,288.00 - World: (202,24,288), Chunk: (at 10,1,0 in 12,18; contains blocks 192,0,288 to 207,255,303), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511) Entity's Momentum: 0.00, -0.01, -0.09 Entity's Rider: ~~ERROR~~ NullPointerException: null Entity's Vehicle: ~~ERROR~~ NullPointerException: null Stacktrace: at aqr.i(SourceFile:1278) at qu.i(SourceFile:478) -- Affected level -- Details: Level name: Minecrack-2 All players: 1 total; [qx['Zaraxas'/2898, l='Minecrack-2', x=1619.70, y=25.00, z=2316.91]] Chunk stats: ServerChunkCache: 4739 Drop: 0 Level seed: 8054171159163673492 Level generator: ID 00 - default, ver 1. Features enabled: true Level generator options: Level spawn location: -68.00,64.00,256.00 - World: (-68,64,256), Chunk: (at 12,4,0 in -5,16; contains blocks -80,0,256 to -65,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511) Level time: 34679347 game time, 34834788 day time Level dimension: 0 Level storage version: 0x04ABD - Anvil Level weather: Rain time: 79442 (now: false), thunder time: 88656 (now: false) Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false Stacktrace: at net.minecraft.server.MinecraftServer.A(SourceFile:608) at net.minecraft.server.MinecraftServer.z(SourceFile:532) at cyk.z(SourceFile:155) at net.minecraft.server.MinecraftServer.run(SourceFile:448) at java.lang.Thread.run(Unknown Source) -- System Details -- Details: Minecraft Version: 1.8.1 Operating System: Windows 7 (amd64) version 6.1 Java Version: 1.7.0_45, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 1390454248 bytes (1326 MB) / 3170893824 bytes (3024 MB) up to 5726797824 bytes (5461 MB) JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx6G IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94 Profiler Position: N/A (disabled) Player Count: 1 / 8; [qx['Zaraxas'/2898, l='Minecrack-2', x=1619.70, y=25.00, z=2316.91]] Type: Integrated Server (map_client.txt) Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.