Fehler, Mincraft Plugin Anzeiger

Question

Ich erhalte den folgenden Fehlercode:

[21:55:37 ERROR]: Could not pass event PlayerChangedWorldEvent to LuckySkyPvP v1.1 
org.bukkit.event.EventException 
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at net.minecraft.server.v1_8_R3.PlayerList.moveToWorld(PlayerList.java:628) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at org.bukkit.craftbukkit.v1_8_R3.entity.CraftPlayer.teleport(CraftPlayer.java:471) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at org.bukkit.craftbukkit.v1_8_R3.entity.CraftEntity.teleport(CraftEntity.java:226) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at com.onarandombox.MultiverseCore.utils.SimpleSafeTTeleporter.safelyTeleport(SimpleSafeTTeleporter.java:215) [Multiverse-Core-2.5.0-SNAPSHOT(1).jar:?] 
    at com.onarandombox.MultiversePortals.listeners.PlayerListenerHelper.performTeleport(PlayerListenerHelper.java:44) [Multiverse-Portals-2.5.jar:?] 
    at com.onarandombox.MultiversePortals.listeners.MVPPlayerMoveListener.playerMove(MVPPlayerMoveListener.java:137) [Multiverse-Portals-2.5.jar:?] 
    at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) ~[?:?] 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_71] 
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_71] 
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:270) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at net.minecraft.server.v1_8_R3.PacketPlayInFlying.a(SourceFile:126) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at net.minecraft.server.v1_8_R3.PacketPlayInFlying$PacketPlayInPosition.a(SourceFile:57) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.7.0_71] 
    at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.7.0_71] 
    at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    at java.lang.Thread.run(Unknown Source) [?:1.7.0_71] 
Caused by: java.util.ConcurrentModificationException 
    at java.util.HashMap$HashIterator.nextEntry(Unknown Source) ~[?:1.7.0_71] 
    at java.util.HashMap$KeyIterator.next(Unknown Source) ~[?:1.7.0_71] 
    at SkyPvPTobiasS.ScoreBoardClass.onWorldChange(ScoreBoardClass.java:165) ~[?:?] 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_71] 
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_71] 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_71] 
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_71] 
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[craftbukkit.jar:git-Spigot-5f38d38-12698ea] 
    ... 28 more 

Und das ist der Teil des Codes:

for(Scoreboard key : boards.keySet()) { 
    if(boards.get(key).equals(e.getPlayer())) { 
     boards.remove(key); 
    } 
} 

Der Code hat eine alte Anzeigetafel Schlüssel und danach löschen um eine neue Anzeigetafel zu erstellen, denn in einer Welt ist eine Anzeigetafel und in einer anderen Welt eine andere.

Aber wenn ich die Welt ändern manchmal funktioniert es nicht in diesem Teil des Codes und der Fehler wird angezeigt.

Answer 1

Wenn Sie dies tun:

for(Scoreboard key : boards.keySet()) { 
    if(boards.get(key).equals(e.getPlayer())) { 
     boards.remove(key); 
    } 
} 

Sie lesen boards Taste für Taste. Das Problem ist, dass Sie Tasten lesen, wenn Sie versuchen, eine zu entfernen.

Versuchen mit diesem und sagen Sie mir zu tun, wenn es um das Problem zu beheben:

for(Scoreboard key : new HashSet<>(boards.keySet())) { // copy of the keySet before itterating 
    if(boards.get(key).equals(e.getPlayer())) { 
     boards.remove(key); 
    } 
}