This Bugzilla instance is a read-only archive of historic NetBeans bug reports. To report a bug in NetBeans please follow the project's instructions for reporting issues.
Pressing ctrl + TAB shows exception window before gettting a chance to select the item from the pop up. Following is the stack trace... org.netbeans.mdr.util.DebugException at org.netbeans.mdr.storagemodel.StorableObject.read(StorableObject.java:427) at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.readStreamable(BtreeDatabase.java:908) at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.getRecord(BtreeDatabase.java:976) at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.getIfExists(BtreeDatabase.java:725) at org.netbeans.mdr.storagemodel.MdrStorage.getObject(MdrStorage.java:696) at org.netbeans.mdr.NBMDRepositoryImpl.getByMofId(NBMDRepositoryImpl.java:369) at org.netbeans.mdr.storagemodel.AttrCollection.checkUnwrap(AttrCollection.java:90) at org.netbeans.mdr.storagemodel.AttrCollection.toArray(AttrCollection.java:240) at org.netbeans.mdr.handlers.AttrImmutCollWrapper.toArray(AttrImmutCollWrapper.java:137) at org.netbeans.modules.javacore.jmiimpl.javamodel.LightAttrList.updateHardReferences(LightAttrList.java:62) at org.netbeans.modules.javacore.jmiimpl.javamodel.LightAttrList.<init>(LightAttrList.java:57) at org.netbeans.modules.javacore.jmiimpl.javamodel.SemiPersistentElement.createChildrenList(SemiPersistentElement.java:923) at org.netbeans.modules.javacore.jmiimpl.javamodel.JavaClassImpl.getContents(JavaClassImpl.java:413) at org.netbeans.jmi.javamodel.JavaClass$Impl.getContents(Unknown Source) at org.netbeans.modules.javacore.jmiimpl.javamodel.ClassDefinitionImpl.getInnerClass(ClassDefinitionImpl.java:337) at org.netbeans.modules.javacore.jmiimpl.javamodel.ClassDefinitionImpl.getInnerClass(ClassDefinitionImpl.java:258) at org.netbeans.modules.javacore.jmiimpl.javamodel.JavaClassImpl.getInnerClass(JavaClassImpl.java:441) at org.netbeans.modules.editor.java.NbJavaJMISyntaxSupport.getTypeFromName(NbJavaJMISyntaxSupport.java:369) at org.netbeans.modules.editor.java.NbJMICompletionJavaDoc.parseLink(NbJMICompletionJavaDoc.java:291) at org.netbeans.modules.editor.java.NbJMICompletionJavaDoc.parseLink(NbJMICompletionJavaDoc.java:214) at org.netbeans.editor.ext.java.JavaCompletionJavaDoc.createAnchor(JavaCompletionJavaDoc.java:153) at org.netbeans.modules.editor.java.NbJMICompletionJavaDoc.access$800(NbJMICompletionJavaDoc.java:45) at org.netbeans.modules.editor.java.NbJMICompletionJavaDoc$JMIParsingThread.getHyperlinkedTypeName(NbJMICompletionJavaDoc.java:582) at org.netbeans.modules.editor.java.NbJMICompletionJavaDoc$JMIParsingThread.getHyperlinkedTypeName(NbJMICompletionJavaDoc.java:565) at org.netbeans.modules.editor.java.NbJMICompletionJavaDoc$JMIParsingThread.getCallableFeatureHeader(NbJMICompletionJavaDoc.java:767) at org.netbeans.modules.editor.java.NbJMICompletionJavaDoc$JMIParsingThread.run(NbJMICompletionJavaDoc.java:835) at org.netbeans.modules.editor.java.JavaCompletionProvider$DocQuery$DocItem$MyJavaDoc.setItem(JavaCompletionProvider.java:274) at org.netbeans.modules.editor.java.JavaCompletionProvider$DocQuery$DocItem$MyJavaDoc.access$100(JavaCompletionProvider.java:267) at org.netbeans.modules.editor.java.JavaCompletionProvider$DocQuery$DocItem.<init>(JavaCompletionProvider.java:232) at org.netbeans.modules.editor.java.JavaCompletionProvider$DocQuery.query(JavaCompletionProvider.java:199) at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:189) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:493) [catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:926) ==> org.netbeans.mdr.util.DebugException: Attribute 'exception^ames' not found. at org.netbeans.mdr.storagemodel.StorableClass.getAttrDesc(StorableClass.java:395) at org.netbeans.mdr.storagemodel.AttrCollection.read(AttrCollection.java:115) at org.netbeans.mdr.util.IOUtils.read(IOUtils.java:490) at org.netbeans.mdr.util.IOUtils.read(IOUtils.java:418) at org.netbeans.mdr.storagemodel.StorableObject.read(StorableObject.java:422) at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.readStreamable(BtreeDatabase.java:908) at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.getRecord(BtreeDatabase.java:976) at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.getIfExists(BtreeDatabase.java:725) at org.netbeans.mdr.storagemodel.MdrStorage.getObject(MdrStorage.java:696) at org.netbeans.mdr.NBMDRepositoryImpl.getByMofId(NBMDRepositoryImpl.java:369) at org.netbeans.mdr.storagemodel.AttrCollection.checkUnwrap(AttrCollection.java:90) at org.netbeans.mdr.storagemodel.AttrCollection.toArray(AttrCollection.java:240) at org.netbeans.mdr.handlers.AttrImmutCollWrapper.toArray(AttrImmutCollWrapper.java:137) at org.netbeans.modules.javacore.jmiimpl.javamodel.LightAttrList.updateHardReferences(LightAttrList.java:62) at org.netbeans.modules.javacore.jmiimpl.javamodel.LightAttrList.<init>(LightAttrList.java:57) at org.netbeans.modules.javacore.jmiimpl.javamodel.SemiPersistentElement.createChildrenList(SemiPersistentElement.java:923) at org.netbeans.modules.javacore.jmiimpl.javamodel.JavaClassImpl.getContents(JavaClassImpl.java:413) at org.netbeans.jmi.javamodel.JavaClass$Impl.getContents(Unknown Source) at org.netbeans.modules.javacore.jmiimpl.javamodel.ClassDefinitionImpl.getInnerClass(ClassDefinitionImpl.java:337) at org.netbeans.modules.javacore.jmiimpl.javamodel.ClassDefinitionImpl.getInnerClass(ClassDefinitionImpl.java:258) at org.netbeans.modules.javacore.jmiimpl.javamodel.JavaClassImpl.getInnerClass(JavaClassImpl.java:441) at org.netbeans.modules.editor.java.NbJavaJMISyntaxSupport.getTypeFromName(NbJavaJMISyntaxSupport.java:369) at org.netbeans.modules.editor.java.NbJMICompletionJavaDoc.parseLink(NbJMICompletionJavaDoc.java:291) at org.netbeans.modules.editor.java.NbJMICompletionJavaDoc.parseLink(NbJMICompletionJavaDoc.java:214) at org.netbeans.editor.ext.java.JavaCompletionJavaDoc.createAnchor(JavaCompletionJavaDoc.java:153) at org.netbeans.modules.editor.java.NbJMICompletionJavaDoc.access$800(NbJMICompletionJavaDoc.java:45) at org.netbeans.modules.editor.java.NbJMICompletionJavaDoc$JMIParsingThread.getHyperlinkedTypeName(NbJMICompletionJavaDoc.java:582) at org.netbeans.modules.editor.java.NbJMICompletionJavaDoc$JMIParsingThread.getHyperlinkedTypeName(NbJMICompletionJavaDoc.java:565) at org.netbeans.modules.editor.java.NbJMICompletionJavaDoc$JMIParsingThread.getCallableFeatureHeader(NbJMICompletionJavaDoc.java:767) at org.netbeans.modules.editor.java.NbJMICompletionJavaDoc$JMIParsingThread.run(NbJMICompletionJavaDoc.java:835) at org.netbeans.modules.editor.java.JavaCompletionProvider$DocQuery$DocItem$MyJavaDoc.setItem(JavaCompletionProvider.java:274) at org.netbeans.modules.editor.java.JavaCompletionProvider$DocQuery$DocItem$MyJavaDoc.access$100(JavaCompletionProvider.java:267) at org.netbeans.modules.editor.java.JavaCompletionProvider$DocQuery$DocItem.<init>(JavaCompletionProvider.java:232) at org.netbeans.modules.editor.java.JavaCompletionProvider$DocQuery.query(JavaCompletionProvider.java:199) at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:189) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:493) [catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:926)
To solve this problem, you can try to exit the ide, delete directory ${userdir}\var\cache\mdrstorage and restart the ide. The exception is thrown by the mdr module upon deserialization of objects, wrong attribute name was serialized ('exceptionNames' insteadof 'exception^ames', we should investigate why) or the storage file may have been broken somehow.
*** Issue 75926 has been marked as a duplicate of this issue. ***
I am closing all reports in category Java/Unsupported as wontfix. These should be dead issues --- if the reported cases are against some live part of the NetBeans IDE please reopen and we can discuss to which category they belong.