Quando abro um arquivo no Netbeans, obtenho um Please wait... na primeira linha da janela do editor.
Eu também recebo um ícone de exceção na parte inferior da tela, que diz:
A org.netbeans.modules.parsing.spi.ParseException exception has occurred.
However, the system should continue working without further problems.
Click Show Details for the stack trace.
Se eu clicar em "mostrar mais detalhes", recebo isto:
java.lang.IllegalStateException: Cannot find an HtmlParser implementation for HTML5
at org.netbeans.editor.ext.html.parser.api.SyntaxAnalyzerResult.findParser(Unknown Source)
at org.netbeans.editor.ext.html.parser.api.SyntaxAnalyzerResult.doParseHtml(Unknown Source)
at org.netbeans.editor.ext.html.parser.api.SyntaxAnalyzerResult.parseHtml(Unknown Source)
at org.netbeans.modules.html.editor.api.gsf.HtmlParserResult.root(HtmlParserResult.java:133)
at org.netbeans.modules.html.editor.api.gsf.HtmlParserResult.roots(HtmlParserResult.java:172)
at org.netbeans.modules.html.editor.gsf.HtmlStructureScanner.folds(HtmlStructureScanner.java:158)
at org.netbeans.modules.csl.editor.fold.GsfFoldManager$JavaElementFoldTask.addTree(Unknown Source)
at org.netbeans.modules.csl.editor.fold.GsfFoldManager$JavaElementFoldTask.access0(Unknown Source)
at org.netbeans.modules.csl.editor.fold.GsfFoldManager$JavaElementFoldTask.run(Unknown Source)
at org.netbeans.editor.BaseDocument.render(Unknown Source)
at org.netbeans.modules.csl.editor.fold.GsfFoldManager$JavaElementFoldTask.scan(Unknown Source)
at org.netbeans.modules.csl.editor.fold.GsfFoldManager$JavaElementFoldTask.access0(Unknown Source)
at org.netbeans.modules.csl.editor.fold.GsfFoldManager$JavaElementFoldTask.run(Unknown Source)
at org.netbeans.modules.csl.editor.fold.GsfFoldManager$JavaElementFoldTask.run(Unknown Source)
at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(Unknown Source)
at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(Unknown Source)
at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(Unknown Source)
at org.netbeans.modules.parsing.impl.TaskProcessor.call(Unknown Source)
at org.netbeans.modules.parsing.impl.TaskProcessor.call(Unknown Source)
at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:168)
at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:356)
at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Unknown Source)
Caused: org.netbeans.modules.parsing.spi.ParseException
at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(Unknown Source)
[catch] at org.netbeans.modules.parsing.api.ParserManager.parse(Unknown Source)
at org.netbeans.modules.csl.editor.fold.GsfFoldManager$JavaElementFoldTask.gsfFoldScan(Unknown Source)
at org.netbeans.modules.csl.editor.fold.GsfFoldManager$JavaElementFoldTask.run(Unknown Source)
at org.netbeans.modules.csl.editor.fold.GsfFoldManager$JavaElementFoldTask.run(Unknown Source)
at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(Unknown Source)
at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(Unknown Source)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:679)
Estou usando o NetBeans IDE 7.0.1 padrão, disponível diretamente nos repositórios do Ubuntu 12.04.
Eu tive um problema muito parecido com o meu aplicativo php; ele disse por favor, aguarde ... no topo da página e não me deixaria editar o arquivo corretamente.
Percebi que o NetBeans achava que o projeto estava em HTML5 que não é suportado pelo NetBeans 7.0.1, então cliquei em "aguarde ..." e selecionei para usar uma versão mais antiga do HTML como o padrão do projeto. Ei pronto, trabalhado imediatamente!