java.lang.Throwable: Locked by:
   at org.openide.filesystems.FileLock.<init>(FileLock.java:85)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.LockForFile.<init>(LockForFile.java:91)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.LockForFile.tryLock(LockForFile.java:102)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj.lock(FileObj.java:359)
   at org.openide.loaders.MultiDataObject$Entry.takeLock(MultiDataObject.java:1356)
   at org.netbeans.modules.xml.XMLDataLoader$XMLFileEntry.takeLock(XMLDataLoader.java:378)
   at org.netbeans.modules.xml.text.TextEditorSupport$Env.takeLock(TextEditorSupport.java:656)
   at org.openide.text.DataEditorSupport$Env.outputStream(DataEditorSupport.java:891)
   at org.openide.text.CloneableEditorSupport.saveDocument(CloneableEditorSupport.java:1137)
   at org.openide.text.DataEditorSupport.superSaveDoc(DataEditorSupport.java:606)
   at org.openide.text.DataEditorSupport$SaveImpl.run(DataEditorSupport.java:1309)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:607)
   at org.openide.filesystems.FileUtil.runAtomicAction(FileUtil.java:603)
   at org.openide.text.DataEditorSupport.saveDocument(DataEditorSupport.java:602)
   at org.netbeans.modules.xml.text.TextEditorSupport.saveDocument(TextEditorSupport.java:425)
   at org.netbeans.modules.xml.text.TextEditorSupport$Env.save(TextEditorSupport.java:663)
   at org.netbeans.modules.xml.retriever.catalog.impl.XAMCatalogWriteModelImpl.save(XAMCatalogWriteModelImpl.java:296)
   at org.netbeans.modules.xml.retriever.catalog.impl.XAMCatalogWriteModelImpl.addURI(XAMCatalogWriteModelImpl.java:179)
   at org.netbeans.modules.xml.retriever.catalog.impl.XAMCatalogWriteModelImpl.addURI(XAMCatalogWriteModelImpl.java:150)
   at org.netbeans.modules.xml.retriever.impl.RetrieverEngineImpl.createCatalogIfRequired(RetrieverEngineImpl.java:522)
   at org.netbeans.modules.xml.retriever.impl.RetrieverEngineImpl.pullRecursively(RetrieverEngineImpl.java:211)
   at org.netbeans.modules.xml.retriever.impl.RetrieverEngineImpl.run(RetrieverEngineImpl.java:157)
   at org.netbeans.modules.xml.retriever.impl.RetrieverEngineImpl.start(RetrieverEngineImpl.java:130)
   at org.netbeans.modules.xml.retriever.impl.RetrieverImpl.retrieveResourceImpl(RetrieverImpl.java:158)
   at org.netbeans.modules.xml.retriever.impl.RetrieverImpl.retrieveResource(RetrieverImpl.java:142)
   at org.netbeans.modules.xml.retriever.impl.RetrieverImpl.retrieveResource(RetrieverImpl.java:92)
   at org.netbeans.modules.xml.retriever.impl.Util.retrieveAndCache(Util.java:191)
   at org.netbeans.modules.xml.retriever.impl.Util.retrieveAndCache(Util.java:139)
   at org.netbeans.modules.xml.retriever.catalog.impl.CatalogModelImpl.retrieveCacheAndLookup(CatalogModelImpl.java:489)
   at org.netbeans.modules.xml.retriever.catalog.impl.CatalogModelImpl.doGetModelSource(CatalogModelImpl.java:239)
   at org.netbeans.modules.xml.retriever.catalog.impl.CatalogModelImpl.getModelSource(CatalogModelImpl.java:183)
   at org.netbeans.modules.xml.schema.completion.util.DefaultModelProvider.getCompletionModel(DefaultModelProvider.java:127)
   at org.netbeans.modules.xml.schema.completion.util.DefaultModelProvider.getModels(DefaultModelProvider.java:87)
   at org.netbeans.modules.xml.schema.completion.util.CompletionContextImpl.initModels(CompletionContextImpl.java:913)
   at org.netbeans.modules.xml.schema.completion.CompletionQuery.getCompletionItems(CompletionQuery.java:356)
   at org.netbeans.modules.xml.schema.completion.CompletionQuery$ModelTask.run(CompletionQuery.java:326)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2036)