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Product Version = NetBeans IDE 7.1 Beta (Build 201109222201) Operating System = Windows XP version 5.1 running on x86 Java; VM; Vendor = 1.7.0 Runtime = Java HotSpot(TM) Client VM 21.0-b17 Here is what I was doing: 1) Right-click project name and choose Properties 2) Click Application 3) Enter a new Vendor name and click OK I get this error message: A org.openide.util.RequestProcessor$SlowItem exception has occurred. Please report this at http://www.netbeans.org/community/issues.html, including a copy of your messages.log file as an attachment. The messages.log file is located in your C:\Documents and Settings\gchappel.ST-USERS\.netbeans\7.1beta\var\log folder. Here is my message log: java.lang.IllegalStateException: Should not acquire Children.MUTEX while holding ProjectManager.mutex() at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1910) at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1326) at org.openide.util.Mutex.readAccess(Mutex.java:354) at org.openide.loaders.DataObject.getNodeDelegateImpl(DataObject.java:302) at org.openide.loaders.DataObject.getNodeDelegate(DataObject.java:294) at org.openide.loaders.FolderLookup$ICItem.getDisplayName(FolderLookup.java:647) at org.netbeans.modules.javafx2.project.JFXProjectProperties.storeBrowserPath(JFXProjectProperties.java:1286) at org.netbeans.modules.javafx2.project.JFXProjectProperties.storeRest(JFXProjectProperties.java:947) at org.netbeans.modules.javafx2.project.JFXProjectProperties.access$100(JFXProjectProperties.java:104) at org.netbeans.modules.javafx2.project.JFXProjectProperties$8.run(JFXProjectProperties.java:1118) at org.netbeans.modules.javafx2.project.JFXProjectProperties$8.run(JFXProjectProperties.java:1100) at org.openide.util.Mutex.writeAccess(Mutex.java:436) at org.netbeans.modules.javafx2.project.JFXProjectProperties.store(JFXProjectProperties.java:1100) at org.netbeans.modules.javafx2.project.ui.JFXProjectPropertiesSaver.save(JFXProjectPropertiesSaver.java:65) at org.netbeans.modules.java.j2seproject.ui.customizer.CustomizerProviderImpl$StoreListener.actionPerformed(CustomizerProviderImpl.java:170) at org.netbeans.modules.project.uiapi.CustomizerDialog$OptionListener$2$1.run(CustomizerDialog.java:298) at org.openide.util.Mutex.writeAccess(Mutex.java:397) at org.netbeans.modules.project.uiapi.CustomizerDialog$OptionListener$2.run(CustomizerDialog.java:294) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1973) Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to at org.openide.util.RequestProcessor.post(RequestProcessor.java:425) at org.netbeans.modules.project.uiapi.CustomizerDialog$OptionListener.actionPerformed(CustomizerDialog.java:291) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252) at java.awt.Component.processMouseEvent(Component.java:6504) at javax.swing.JComponent.processMouseEvent(JComponent.java:3321) at java.awt.Component.processEvent(Component.java:6269) at java.awt.Container.processEvent(Container.java:2229) at java.awt.Component.dispatchEventImpl(Component.java:4860) at java.awt.Container.dispatchEventImpl(Container.java:2287) at java.awt.Component.dispatchEvent(Component.java:4686) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422) at java.awt.Container.dispatchEventImpl(Container.java:2273) at java.awt.Window.dispatchEventImpl(Window.java:2713) at java.awt.Component.dispatchEvent(Component.java:4686) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707) at java.awt.EventQueue.access$000(EventQueue.java:101) at java.awt.EventQueue$3.run(EventQueue.java:666) at java.awt.EventQueue$3.run(EventQueue.java:664) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87) at java.awt.EventQueue$4.run(EventQueue.java:680) at java.awt.EventQueue$4.run(EventQueue.java:678) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:677) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:153) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105) [catch] at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Fix for this issue will be included in next 7.1 Beta build. *** This bug has been marked as a duplicate of bug 202492 ***