org.apache.commons.lang.UnhandledException: Plugin UltraCosmetics v2.3.9 generated an exception while executing task 479049

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via javacodegeeks.com by Unknown author

Causes : The Collection is internally modified, while a thread is iterating over it. OR after the creation of an iterator, the Collection is internally modified by any method other than the iterator’s own methods for removal and addition.

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via oracle.com by Unknown author

In order to avoid more than one threads accessing or modifying the same object, you can synchronize them over the object, in order to allow only one thread to manipulate it over time.

Solutions on the web

via GitHub by NLthijs48
, 1 year ago
Plugin UltraCosmetics v2.3.9 generated an exception while executing task 479049
via GitHub by ryans1230
, 1 year ago
Plugin BanManager v5.9.0 generated an exception while executing task 601
via GitHub by Marascraft
, 1 year ago
Plugin PreciousStones v10.0.4 generated an exception while executing task 1413
via GitHub by Foorack
, 1 year ago
Plugin BanManager v5.9.0 generated an exception while executing task 6711
via GitHub by Noket
, 1 year ago
Plugin PerWorldInventory v1.8.1 generated an exception while executing task 4857
via spigotmc.org by Unknown author, 1 year ago
Plugin ChestShop v3.8.12 generated an exception while executing task 69
java.util.ConcurrentModificationException:
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
at java.util.ArrayList$Itr.next(ArrayList.java:851)
at org.bukkit.craftbukkit.v1_9_R2.CraftWorld.getEntities(CraftWorld.java:667)
at be.isach.ultracosmetics.cosmetics.gadgets.GadgetDiscoBall.getNearbyEntities(GadgetDiscoBall.java:106)
at be.isach.ultracosmetics.cosmetics.gadgets.GadgetDiscoBall.onUpdate(GadgetDiscoBall.java:93)
at be.isach.ultracosmetics.cosmetics.gadgets.Gadget$1.run(Gadget.java:118)
at org.bukkit.craftbukkit.v1_9_R2.scheduler.CraftTask.run(CraftTask.java:71)
at org.bukkit.craftbukkit.v1_9_R2.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

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