java.lang.IllegalStateException: Too many org.netbeans.modules.web.project.WebPersistenceProvider$2 (3) in shared RequestProcessor; create your own
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:425)
   at org.netbeans.modules.web.project.WebPersistenceProvider.puChanged(WebPersistenceProvider.java:249)
   at org.netbeans.modules.web.project.WebPersistenceProvider.access$100(WebPersistenceProvider.java:91)
   at org.netbeans.modules.web.project.WebPersistenceProvider$1.propertyChange(WebPersistenceProvider.java:107)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:318)
   at org.netbeans.modules.j2ee.persistence.spi.support.PersistenceScopesHelper.fileEvent(PersistenceScopesHelper.java:179)
   at org.netbeans.modules.j2ee.persistence.spi.support.PersistenceScopesHelper.access$300(PersistenceScopesHelper.java:72)
   at org.netbeans.modules.j2ee.persistence.spi.support.PersistenceScopesHelper$FileListener.fileDataCreated(PersistenceScopesHelper.java:214)
   at org.openide.filesystems.FileUtil$Holder.someChange(FileUtil.java:462)
   at org.openide.filesystems.FileUtil$Holder.fileDataCreated(FileUtil.java:506)
   at org.openide.filesystems.FCLSupport$DispatchEventWrapper.dispatchEventImpl(FCLSupport.java:139)
   at org.openide.filesystems.FCLSupport$DispatchEventWrapper.dispatchEvent(FCLSupport.java:128)
   at org.openide.filesystems.FCLSupport.dispatchEvent(FCLSupport.java:105)
   at org.openide.filesystems.FileObject$ED.dispatch(FileObject.java:1146)
   at org.openide.filesystems.EventControl.invokeDispatchers(EventControl.java:208)
   at org.openide.filesystems.EventControl.exitAtomicAction(EventControl.java:182)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:566)
   at org.netbeans.modules.j2ee.persistence.provider.ProviderUtil.createPersistenceDDFile(ProviderUtil.java:764)
   at org.netbeans.modules.j2ee.persistence.provider.ProviderUtil.getPUDataObject(ProviderUtil.java:718)
   at org.netbeans.modules.j2ee.persistence.provider.ProviderUtil.addPersistenceUnit(ProviderUtil.java:665)
   at org.netbeans.modules.j2ee.persistence.wizard.Util.addPersistenceUnitToProject(Util.java:634)
   at org.netbeans.modules.j2ee.persistence.wizard.fromdb.RelatedCMPWizard.instantiate(RelatedCMPWizard.java:279)
   at org.openide.loaders.TemplateWizard.handleInstantiate(TemplateWizard.java:591)
   at org.openide.loaders.TemplateWizard.instantiateNewObjects(TemplateWizard.java:412)
   at org.openide.loaders.TemplateWizardIterImpl.instantiate(TemplateWizardIterImpl.java:251)
   at org.openide.loaders.TemplateWizardIteratorWrapper.instantiate(TemplateWizardIteratorWrapper.java:164)
   at org.openide.WizardDescriptor.callInstantiateOpen(WizardDescriptor.java:1551)
   at org.openide.WizardDescriptor.callInstantiate(WizardDescriptor.java:1505)
   at org.openide.WizardDescriptor.access$1700(WizardDescriptor.java:137)
   at org.openide.WizardDescriptor$Listener$2$1.run(WizardDescriptor.java:2076)
   at org.openide.WizardDescriptor$Listener$2.run(WizardDescriptor.java:2125)
   at org.openide.WizardDescriptor.lazyValidate(WizardDescriptor.java:1480)
   at org.openide.WizardDescriptor.access$1300(WizardDescriptor.java:137)
   at org.openide.WizardDescriptor$Listener.actionPerformed(WizardDescriptor.java:2132)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:0)
   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.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerImpl.java:459)
   at $Proxy37.actionPerformed(.java:0)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
   at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
   at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
   at java.awt.Component.processMouseEvent(Component.java:6267)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
   at java.awt.Component.processEvent(Component.java:6032)
   at java.awt.Container.processEvent(Container.java:2041)
   at java.awt.Component.dispatchEventImpl(Component.java:4630)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4577)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4238)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4168)
   at java.awt.Container.dispatchEventImpl(Container.java:2085)
   at java.awt.Window.dispatchEventImpl(Window.java:2478)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:148)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178)
   at java.awt.Dialog$1.run(Dialog.java:1046)
   at java.awt.Dialog$3.run(Dialog.java:1098)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.awt.Dialog.show(Dialog.java:1096)
   at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:1038)
   at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:1072)
   at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:1060)
   at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:126)
   at org.openide.util.Mutex.doEventAccess(Mutex.java:1361)
   at org.openide.util.Mutex.readAccess(Mutex.java:271)
   at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:1045)
   at java.awt.Component.show(Component.java:1563)
   at java.awt.Component.setVisible(Component.java:1515)
   at java.awt.Window.setVisible(Window.java:842)
   at java.awt.Dialog.setVisible(Dialog.java:986)
   at org.openide.loaders.TemplateWizard.instantiateImpl(TemplateWizard.java:498)
   at org.openide.loaders.TemplateWizard.instantiate(TemplateWizard.java:377)
   at org.netbeans.modules.project.ui.actions.NewFile.doPerform(NewFile.java:157)
   at org.netbeans.modules.project.ui.actions.NewFile.access$200(NewFile.java:83)
   at org.netbeans.modules.project.ui.actions.NewFile$PopupListener.actionPerformed(NewFile.java:336)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
   at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
   at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
   at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1223)
   at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1264)
   at java.awt.Component.processMouseEvent(Component.java:6267)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
   at java.awt.Component.processEvent(Component.java:6032)
   at java.awt.Container.processEvent(Container.java:2041)
   at java.awt.Component.dispatchEventImpl(Component.java:4630)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4577)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4238)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4168)
   at java.awt.Container.dispatchEventImpl(Container.java:2085)
   at java.awt.Window.dispatchEventImpl(Window.java:2478)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:148)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)