Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via GitHub by JiRt
, 1 year ago
Plugin Residence v4.4.1.1 generated an exception while executing task 60699
via GitHub by EvilOlaf
, 2 years ago
Plugin BanManager v5.6.1 generated an exception while executing task 33
via GitHub by EvilOlaf
, 1 year ago
Plugin BanManager v5.9.0 generated an exception while executing task 3533687
via GitHub by Twi5TeD
, 2 years ago
Plugin BanManager v5.8.0 generated an exception while executing task 13234
via GitHub by confuser
, 1 year ago
Plugin BanManager v5.6.0 generated an exception while executing task 34
via GitHub by Ishidres
, 1 year ago
Plugin PerWorldInventory v1.8.2 generated an exception while executing task 2732131
java.util.ConcurrentModificationException: 	at java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:711)	at java.util.LinkedHashMap$LinkedKeyIterator.next(LinkedHashMap.java:734)	at org.bukkit.permissions.PermissibleBase.calculateChildPermissions(PermissibleBase.java:181)	at org.bukkit.permissions.PermissibleBase.calculateChildPermissions(PermissibleBase.java:190)	at sun.reflect.GeneratedMethodAccessor152.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at ru.tehkode.permissions.bukkit.regexperms.PermissiblePEX.calculateChildPerms(PermissiblePEX.java:191)	at ru.tehkode.permissions.bukkit.regexperms.PermissiblePEX.recalculatePermissions(PermissiblePEX.java:178)	at org.bukkit.craftbukkit.v1_8_R3.entity.CraftHumanEntity.recalculatePermissions(CraftHumanEntity.java:130)	at org.bukkit.permissions.Permission.recalculatePermissibles(Permission.java:168)	at org.bukkit.permissions.Permission.(Permission.java:67)	at org.bukkit.permissions.Permission.(Permission.java:35)	at com.bekvon.bukkit.residence.containers.PlayerGroup.getPermissionGroup(PlayerGroup.java:102)	at com.bekvon.bukkit.residence.containers.PlayerGroup.updateGroup(PlayerGroup.java:69)	at com.bekvon.bukkit.residence.permissions.PermissionManager.updateGroupNameForPlayer(PermissionManager.java:128)	at com.bekvon.bukkit.residence.permissions.PermissionManager.updateGroupNameForPlayer(PermissionManager.java:118)	at com.bekvon.bukkit.residence.listeners.ResidencePlayerListener$3.run(ResidencePlayerListener.java:647)	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71)	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)