Server Errors and Solutions

This page will list errors from your Minecraft server console and solutions to them.

java.lang.ArrayIndexOutOfBoundsException
This error is typical for world corrupted servers.
The fastest way to fix this would be to restore your world from a backup.
FadeHost takes server backups daily, please contact us via support tickets and request a rollback.
INFO java.lang.IllegalArgumentException: Too big view radius!
This error means that your view distance server setting is higher than 15 (max) and your server will not be able to start.
Go to files -> config files -> server settings and change view-distance to a value between 4-15 and save/restart your server.
 
[Server] WARN Exception in thread "Craft Scheduler Thread - 504"
[Server] WARN org.apache.commons.lang.UnhandledException: Plugin GroupManager vPre2.14.1.3 FINAL (Phoenix) generated an exception while executing task 34
[Server] INFO at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
[Server] INFO at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[Server] INFO at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[Server] INFO at java.lang.Thread.run(Thread.java:745)
[Server] INFO Caused by: java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()[Lorg/bukkit/entity/Player;
[Server] INFO at org.anjocaido.groupmanager.metrics.Metrics.postPlugin(Metrics.java:335)
[Server] INFO at org.anjocaido.groupmanager.metrics.Metrics.access$400(Metrics.java:57)
[Server] INFO at org.anjocaido.groupmanager.metrics.Metrics$1.run(Metrics.java:223)
[Server] INFO at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftTask.run(CraftTask.java:71)
[Server] INFO at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
This error means that the Group Manager plugin is outdated or not compatible with your current server version.
[Server] WARN Exception in thread "Craft Scheduler Thread - 504" 
[Server] WARN org.apache.commons.lang.UnhandledException: Plugin GroupManager vPre2.14.1.3 FINAL (Phoenix) generated an exception while executing task 34
[Server] INFO at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
[Server] INFO at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[Server] INFO at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[Server] INFO at java.lang.Thread.run(Thread.java:745)
[Server] INFO Caused by: java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()[Lorg/bukkit/entity/Player;
[Server] INFO at org.anjocaido.groupmanager.metrics.Metrics.postPlugin(Metrics.java:335)
[Server] INFO at org.anjocaido.groupmanager.metrics.Metrics.access$400(Metrics.java:57)
[Server] INFO at org.anjocaido.groupmanager.metrics.Metrics$1.run(Metrics.java:223)
[Server] INFO at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftTask.run(CraftTask.java:71)
[Server] INFO at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
Errors that mention snakeyaml, Yaml or YamlConfiguration are always related to plugin or server config files.
Check the error carefully as it will always show which plugin or config file is causing the error, fixing the error means editing the file and correcting the line that was mentioned in the error log.
Please contact support if you don't know how to fix config files.
NoClassDefFoundError : gnu/trove/map/hash/TCustomHashMap$KeyView @
gnu.trove.map.hash.TCustomHashMap
The error appears in your Minecraft client shortly after you login to the server and get disconnected.
The most common problem is bad configuration of the Featherboard plugin, you will need to undo your config changes or contact support if you don't remember what exactly you edited.
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