Error in Console Regarding ConcurrentModificationException

Discussion in 'Community Support' started by HyperFierce, Jul 8, 2019.

  1. HyperFierce

    HyperFierce New Member

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    Here is the error, I am not sure what is causing it: http://pasted.co/0ea4c152
    If there is already a post talking about this, I apologize in advance. I could not find it.


    Short Snippet:
    "generated an exception while executing task 87
    08.07 14:53:54 [Server] INFO java.util.ConcurrentModificationException: null"
     
    #1
  2. Buguser

    Buguser Active Member
    Supporter Moderator Quality Assurance

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    Seems like a randomspawner is broken, maybe it is caused by a mob with the type MPET?
     
    #2
  3. HyperFierce

    HyperFierce New Member

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    The problem with that is, I don't have any random spawners. The only reason I am currently using Mythic Mobs is because I have custom items with mythic artifacts. My randomspawners file is empty.
     
    #3
  4. Buguser

    Buguser Active Member
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    Try to deactivate the generation of spawn points. Put this into your config:

    Code:
      PointsPerSecond:
        Land: 0
        Air: 0
        Sea: 0
        Lava: 0
        Ground: 0
     
    #4
  5. HyperFierce

    HyperFierce New Member

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    I will try this as well as disabling randomspawning in config. I'll keep you posted on if the errors go away.
     
    #5
  6. Donald Tsang

    Donald Tsang New Member

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    I am having the same problem, and it is still happening after deactivating it.
    And this is my log:
    Task #8521325 for MythicMobs v4.5.9-2586 generated an exception
    java.util.ConcurrentModificationException: null
    at java.util.HashMap$HashIterator.nextNode(Unknown Source) ~[?:1.8.0_181]
    at java.util.HashMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_181]
    at java.lang.Iterable.forEach(Unknown Source) ~[?:1.8.0_181]
    at net.minecraft.server.v1_14_R1.ChunkMapDistance.a(SourceFile:132) ~[craftbukkit-1.14.2-R0.1-SNAPSHOT.jar:git-Bukkit-ba575a5]
    at net.minecraft.server.v1_14_R1.ChunkProviderServer.tickDistanceManager(ChunkProviderServer.java:202) ~[craftbukkit-1.14.2-R0.1-SNAPSHOT.jar:git-Bukkit-ba575a5]
    at net.minecraft.server.v1_14_R1.ChunkProviderServer.getChunkFutureMainThread(ChunkProviderServer.java:142) ~[craftbukkit-1.14.2-R0.1-SNAPSHOT.jar:git-Bukkit-ba575a5]
    at net.minecraft.server.v1_14_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:90) ~[craftbukkit-1.14.2-R0.1-SNAPSHOT.jar:git-Bukkit-ba575a5]
    at net.minecraft.server.v1_14_R1.IChunkProvider.getChunkAt(SourceFile:16) ~[craftbukkit-1.14.2-R0.1-SNAPSHOT.jar:git-Bukkit-ba575a5]
    at org.bukkit.craftbukkit.v1_14_R1.CraftWorld.getChunkAt(CraftWorld.java:322) ~[craftbukkit-1.14.2-R0.1-SNAPSHOT.jar:git-Bukkit-ba575a5]
    at org.bukkit.craftbukkit.v1_14_R1.CraftChunk.getEntities(CraftChunk.java:97) ~[craftbukkit-1.14.2-R0.1-SNAPSHOT.jar:git-Bukkit-ba575a5]
    at io.lumine.xikage.mythicmobs.adapters.bukkit.listeners.ChunkListeners$ChunkLoader.run(ChunkListeners.java:45) ~[?:?]
    at org.bukkit.craftbukkit.v1_14_R1.scheduler.CraftTask.run(CraftTask.java:77) ~[craftbukkit-1.14.2-R0.1-SNAPSHOT.jar:git-Bukkit-ba575a5]
    at org.bukkit.craftbukkit.v1_14_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:393) [craftbukkit-1.14.2-R0.1-SNAPSHOT.jar:git-Bukkit-ba575a5]
    at net.minecraft.server.v1_14_R1.MinecraftServer.b(MinecraftServer.java:957) [craftbukkit-1.14.2-R0.1-SNAPSHOT.jar:git-Bukkit-ba575a5]
    at net.minecraft.server.v1_14_R1.DedicatedServer.b(DedicatedServer.java:370) [craftbukkit-1.14.2-R0.1-SNAPSHOT.jar:git-Bukkit-ba575a5]
    at net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:912) [craftbukkit-1.14.2-R0.1-SNAPSHOT.jar:git-Bukkit-ba575a5]
    at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:766) [craftbukkit-1.14.2-R0.1-SNAPSHOT.jar:git-Bukkit-ba575a5]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_181]
     
    #6

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