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ConcurrentModificationException when DB is not empty [message #1097169]

Thu, 29 August 2013 10:19

Robert Emsbach

Messages: 186
Registered: October 2011
Location: Singapore

Senior Member

Hello,
I created dynamic web project(as instructed in documentation). I am using mysql database. When I deploy project on tomcat and start app, if database is not empty, I get this error:

12:00:58 ERROR [main      ] ContextLoader             - Context initialization failed
java.util.ConcurrentModificationException
       at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
       at java.util.AbstractList$Itr.next(AbstractList.java:343)
       at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:559)
       at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
       at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
       at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
       at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
       at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
       at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206)
       at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705)
       at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
       at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
       at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
       at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
       at org.apache.catalina.core.StandardService.start(StandardService.java:525)
       at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
       at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:597)
       at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
       at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Aug 26, 2013 12:00:58 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
java.util.ConcurrentModificationException
       at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
       at java.util.AbstractList$Itr.next(AbstractList.java:343)
       at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:559)
       at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
       at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
       at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
       at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
       at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
       at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206)
       at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705)
       at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
       at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
       at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
       at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
       at org.apache.catalina.core.StandardService.start(StandardService.java:525)
       at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
       at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:597)
       at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
       at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

this error happened also when I was using derby. It helps when I clean database.
Can anyone help with this?

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