java.lang.OutOfMemoryError: GC overhead limit exceeded
   at org.netbeans.modules.editor.lib2.document.CharContent.getString(CharContent.java:165)
   at org.netbeans.modules.editor.lib2.document.CharContent$SubSequence.toString(CharContent.java:292)
   at org.netbeans.modules.xml.text.api.dom.XMLSyntaxSupport.createElement(XMLSyntaxSupport.java:646)
   at org.netbeans.modules.xml.text.api.dom.XMLSyntaxSupport.getElementChain(XMLSyntaxSupport.java:561)
   at org.netbeans.modules.xml.text.dom.BaseSyntaxElement.getNext(BaseSyntaxElement.java:172)
   at org.netbeans.modules.xml.text.dom.BaseSyntaxElement.getNext(BaseSyntaxElement.java:70)
   at org.netbeans.modules.xml.text.completion.GrammarManager.getEnvironmentElements(GrammarManager.java:368)
   at org.netbeans.modules.xml.text.completion.GrammarManager.loadGrammar(GrammarManager.java:272)
   at org.netbeans.modules.xml.text.completion.GrammarManager.getGrammar(GrammarManager.java:132)
   at org.netbeans.modules.xml.text.completion.XMLCompletionQuery.getPerformer(XMLCompletionQuery.java:300)
   at org.netbeans.modules.xml.text.completion.XMLCompletionQuery.queryValues(XMLCompletionQuery.java:334)
   at org.netbeans.modules.xml.text.completion.XMLCompletionQuery.query(XMLCompletionQuery.java:125)
   at org.netbeans.modules.xml.text.completion.XMLCompletionProvider$Query.query(XMLCompletionProvider.java:224)
   at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:223)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)