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  1. Minecraft: Java Edition
  2. MC-12341

Crash when a certain player joins / Exception ticking world: ConcurrentModificationException

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    Details

    • Type: Bug
    • Status: Resolved
    • Resolution: Invalid
    • Affects Version/s: Minecraft 1.5, Minecraft 1.5.1, Minecraft 1.5.2
    • Fix Version/s: None
    • Labels:
      None
    • Environment:
      See below for full error log
    • Confirmation Status:
      Community Consensus
    • Game Mode:
      Survival

      Description

      (Made sure the server was pure vanilla this time. Reproduced crash.)

      ---- Minecraft Crash Report ----
      // I feel sad now :(
      
      Time: 3/18/13 9:26 PM
      Description: Exception ticking world
      
      java.util.ConcurrentModificationException
      	at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
      	at java.util.HashMap$KeyIterator.next(Unknown Source)
      	at iy.b(SourceFile:196)
      	at iz.b(SourceFile:122)
      	at net.minecraft.server.MinecraftServer.r(SourceFile:454)
      	at hz.r(SourceFile:255)
      	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
      	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
      	at gp.run(SourceFile:573)
      
      
      A detailed walkthrough of the error, its code path and all known details is as follows:
      ---------------------------------------------------------------------------------------
      
      -- Head --
      Stacktrace:
      	at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
      	at java.util.HashMap$KeyIterator.next(Unknown Source)
      	at iy.b(SourceFile:196)
      	at iz.b(SourceFile:122)
      
      -- Affected level --
      Details:
      	Level name: world
      	All players: 6 total
      	Chunk stats: ServerChunkCache: 6138 Drop: 146
      	Level seed: 4709343022063829704
      	Level generator: ID 00 - default, ver 1. Features enabled: true
      	Level generator options: 
      	Level spawn location: World: (108,64,252), Chunk: (at 12,4,12 in 6,15; contains blocks 96,0,240 to 111,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
      	Level time: 204182393 game time, 195675149 day time
      	Level dimension: 0
      	Level storage version: 0x04ABD - Anvil
      	Level weather: Rain time: 30350 (now: false), thunder time: 87283 (now: false)
      	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
      Stacktrace:
      	at net.minecraft.server.MinecraftServer.r(SourceFile:454)
      	at hz.r(SourceFile:255)
      	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
      	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
      	at gp.run(SourceFile:573)
      
      -- System Details --
      Details:
      	Minecraft Version: 1.5
      	Operating System: Linux (amd64) version 3.4.24-nfo
      	Java Version: 1.7.0_11, Oracle Corporation
      	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
      	Memory: 62746016 bytes (59 MB) / 550895616 bytes (525 MB) up to 1908932608 bytes (1820 MB)
      	JVM Flags: 1 total; -Xmx2048M
      	AABB Pool Size: 16910 (946960 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
      	Suspicious classes: No suspicious classes found.
      	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
      	Profiler Position: N/A (disabled)
      	Vec3 Pool Size: 20344 (1139264 bytes; 1 MB) allocated, 0 (0 bytes; 0 MB) used
      	Player Count: 6 / 50
      	Is Modded: Unknown (can't tell)
      	Type: Dedicated Server (map_server.txt)

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            • Assignee:
              Unassigned
              Reporter:
              wellfedhobo Bradley Rhea
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              Dates

              • Created:
                Updated:
                Resolved:
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