java.lang.RuntimeException: java.util.ConcurrentModificationException

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java.util.ConcurrentModificationException:
at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:449)
at java.util.AbstractList$Itr.next(AbstractList.java:420)
at com.sun.enterprise.server.httpservice.monitor.HttpServiceMonitorManager.internalRegisterStats(HttpServiceMonitorManager.java:287)
at com.sun.enterprise.server.httpservice.monitor.HttpServiceMonitorManager.registerStats(HttpServiceMonitorManager.java:121)
at com.sun.enterprise.server.httpservice.monitor.MonitoringEventListenerImpl.addedBeanEvent(MonitoringEventListenerImpl.java:48)
at com.sun.httpservice.spi.monitor.MBManager.registerBeans(MBManager.java:278)
at com.sun.httpservice.spi.monitor.MBManager.initMonitoring(MBManager.java:102)
at com.sun.httpservice.spi.monitor.HttpServiceEventListenerImpl.httpserviceStarted(HttpServiceEventListenerImpl.java:73)
at com.sun.httpservice.spi.monitor.HttpServiceEventListenerImpl.httpServiceEvent(HttpServiceEventListenerImpl.java:52)
at com.sun.httpservice.spi.HttpService.notifyListeners(HttpService.java:709)
at com.sun.httpservice.spi.HttpService.run(HttpService.java:256)
at com.sun.enterprise.web.HttpServiceWebContainer.startHttpService(HttpServiceWebContainer.java:1046)
at com.sun.enterprise.web.HttpServiceWebContainer.initAndRunHttpService(HttpServiceWebContainer.java:984)
at com.sun.enterprise.web.HttpServiceWebContainer.startInstance(HttpServiceWebContainer.java:887)
at com.sun.enterprise.web.HttpServiceWebContainerLifecycle.onStartup(HttpServiceWebContainerLifecycle.java:50)
at com.sun.enterprise.server.ApplicationServer.onStartup(ApplicationServer.java:300)
at com.sun.enterprise.server.PEMain.run(PEMain.java:294)
at com.sun.enterprise.server.PEMain.main(PEMain.java:220)

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