java.util.ConcurrentModificationException: This exception has no message.

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via 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.

via 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 dhazelett
, 11 months ago
This exception has no message.
via GitHub by LordEpos
, 4 months ago
via GitHub by jvasileff
, 2 years ago
via MuleSoft JIRA by Guillermo Fernandes, 1 month ago
This exception has no message.
via Stack Overflow by Ashish Ratan
, 11 months ago
via by Unknown author, 11 months ago
This exception has no message.
at java.util.ArrayList$Itr.checkForComodification(
at java.util.ArrayList$
at com.jiyuanime.listener.ActivatePowerDocumentListener.destroy(
at com.jiyuanime.ActivatePowerModeManage.destroyDocumentListener(
at com.jiyuanime.ActivatePowerModeManage.destroy(
at com.jiyuanime.ActivatePowerModeApplicationPlugin$1.projectClosed(
at com.intellij.openapi.project.impl.ProjectManagerImpl.i(
at com.intellij.openapi.project.impl.ProjectManagerImpl.a(
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(
at com.intellij.openapi.project.impl.ProjectManagerImpl.closeProject(
at com.intellij.openapi.project.impl.ProjectManagerImpl.closeAndDispose(
at com.intellij.ide.impl.ProjectUtil.closeAndDispose(
at java.awt.AWTEventMulticaster.windowClosing(
at java.awt.AWTEventMulticaster.windowClosing(
at java.awt.Window.processWindowEvent(
at javax.swing.JFrame.processWindowEvent(
at java.awt.Window.processEvent(
at java.awt.Component.dispatchEventImpl(
at java.awt.Container.dispatchEventImpl(
at java.awt.Window.dispatchEventImpl(
at java.awt.Component.dispatchEvent(
at java.awt.EventQueue.dispatchEventImpl(
at java.awt.EventQueue.access$500(
at java.awt.EventQueue$
at java.awt.EventQueue$
at Method)
at java.awt.EventQueue$
at java.awt.EventQueue$
at Method)
at java.awt.EventQueue.dispatchEvent(
at com.intellij.ide.IdeEventQueue.e(
at com.intellij.ide.IdeEventQueue._dispatchEvent(
at java.awt.EventDispatchThread.pumpOneEventForFilters(
at java.awt.EventDispatchThread.pumpEventsForFilter(
at java.awt.EventDispatchThread.pumpEventsForHierarchy(
at java.awt.EventDispatchThread.pumpEvents(
at java.awt.EventDispatchThread.pumpEvents(

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