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When invoking a Maven action (rebuild with dependencies), Netbeans 6.9.1 locked up. jstack found the following deadlock: Found one Java-level deadlock: ============================= "StatusProvider": waiting to lock monitor 0x08fe5638 (object 0x76750af0, a org.openide.windows.CloneableOpenSupport$Listener), which is held by "AWT-EventQueue-1" "AWT-EventQueue-1": waiting to lock monitor 0x0917ad2c (object 0x74194328, a org.netbeans.modules.maven.model.pom.impl.POMModelImpl), which is held by "StatusProvider" Java stack information for the threads listed above: =================================================== "StatusProvider": at org.openide.text.CloneableEditorSupport.openDocument(CloneableEditorSupport.java:806) - waiting to lock <0x76750af0> (a org.openide.windows.CloneableOpenSupport$Listener) at org.openide.text.DataEditorSupport.openDocument(DataEditorSupport.java:496) at org.netbeans.modules.maven.model.Utilities._getDocument(Utilities.java:168) at org.netbeans.modules.maven.model.Utilities.access$000(Utilities.java:93) at org.netbeans.modules.maven.model.Utilities$1.getLookup(Utilities.java:226) at org.openide.util.lookup.SimpleProxyLookup.checkLookup(SimpleProxyLookup.java:80) at org.openide.util.lookup.SimpleProxyLookup.lookup(SimpleProxyLookup.java:155) at org.netbeans.modules.xml.xam.dom.AbstractDocumentModel.needsSync(AbstractDocumentModel.java:118) at org.netbeans.modules.xml.xam.AbstractModel.sync(AbstractModel.java:278) - locked <0x74194328> (a org.netbeans.modules.maven.model.pom.impl.POMModelImpl) at org.netbeans.modules.maven.hints.pom.StatusProvider$StatusProviderImpl.findHints(StatusProvider.java:139) at org.netbeans.modules.maven.hints.pom.StatusProvider$StatusProviderImpl.checkHints(StatusProvider.java:130) at org.netbeans.modules.maven.hints.pom.StatusProvider$StatusProviderImpl.access$000(StatusProvider.java:100) at org.netbeans.modules.maven.hints.pom.StatusProvider$StatusProviderImpl$1$1.run(StatusProvider.java:114) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1957) "AWT-EventQueue-1": at org.netbeans.modules.xml.xam.dom.AbstractDocumentModel.getAccess(AbstractDocumentModel.java:571) - waiting to lock <0x74194328> (a org.netbeans.modules.maven.model.pom.impl.POMModelImpl) at org.netbeans.modules.xml.xam.dom.AbstractDocumentModel.documentChanged(AbstractDocumentModel.java:147) at org.netbeans.modules.xml.xam.dom.AbstractDocumentModel.access$100(AbstractDocumentModel.java:79) at org.netbeans.modules.xml.xam.dom.AbstractDocumentModel$DocumentChangeListener.insertUpdate(AbstractDocumentModel.java:205) at org.netbeans.modules.xml.xam.dom.AbstractDocumentModel$WeakDocumentListener.insertUpdate(AbstractDocumentModel.java:189) at org.netbeans.lib.editor.util.swing.PriorityDocumentListenerList.insertUpdate(PriorityDocumentListenerList.java:82) at javax.swing.text.AbstractDocument.fireInsertUpdate(AbstractDocument.java:185) at org.netbeans.editor.BaseDocument.fireInsertUpdate(BaseDocument.java:1661) at org.netbeans.editor.BaseDocument.insertString(BaseDocument.java:810) at org.netbeans.editor.Analyzer.read(Analyzer.java:605) at org.netbeans.editor.BaseDocument.read(BaseDocument.java:1489) at org.netbeans.editor.BaseKit.read(BaseKit.java:701) at org.netbeans.modules.xml.text.TextEditorSupport.loadFromStreamToKit(TextEditorSupport.java:309) at org.openide.text.CloneableEditorSupport.loadDocument(CloneableEditorSupport.java:2132) at org.openide.text.CloneableEditorSupport.access$2800(CloneableEditorSupport.java:126) at org.openide.text.CloneableEditorSupport$Listener.run(CloneableEditorSupport.java:2962) at org.openide.text.CloneableEditorSupport$6$1Query.call(CloneableEditorSupport.java:1697) at org.openide.text.CloneableEditorSupport$6.run(CloneableEditorSupport.java:1708) at org.netbeans.editor.GuardedDocument.runAtomic(GuardedDocument.java:314) at org.openide.text.NbDocument.runAtomic(NbDocument.java:422) at org.openide.text.CloneableEditorSupport.reloadDocument(CloneableEditorSupport.java:1658) at org.openide.text.CloneableEditorSupport.checkReload(CloneableEditorSupport.java:2292) - locked <0x76750af0> (a org.openide.windows.CloneableOpenSupport$Listener) at org.openide.text.CloneableEditorSupport.access$2600(CloneableEditorSupport.java:126) at org.openide.text.CloneableEditorSupport$Listener$1.run(CloneableEditorSupport.java:2928) at org.netbeans.editor.GuardedDocument.runAtomic(GuardedDocument.java:314) at org.openide.text.NbDocument.runAtomic(NbDocument.java:422) at org.openide.text.CloneableEditorSupport$Listener$1.run(CloneableEditorSupport.java:2920) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:597) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:137) 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) Found 1 deadlock.
*** This bug has been marked as a duplicate of bug 187615 ***