java.util.ConcurrentModificationException
   at java.util.HashMap$HashIterator.nextNode(HashMap.java:1437)
   at java.util.HashMap$KeyIterator.next(HashMap.java:1461)
   at org.netbeans.modules.web.core.syntax.JSPProcessor.createBeanVarDeclarations(JSPProcessor.java:158)
   at org.netbeans.modules.web.core.syntax.SimplifiedJspServlet.renderProcess(SimplifiedJspServlet.java:262)
   at org.netbeans.modules.web.core.syntax.JSPProcessor$2.run(JSPProcessor.java:348)
   at org.netbeans.editor.BaseDocument.render(BaseDocument.java:1421)
   at org.netbeans.modules.web.core.syntax.JSPProcessor.process(JSPProcessor.java:344)
   at org.netbeans.modules.web.core.syntax.EmbeddingProviderImpl.getEmbeddings(EmbeddingProviderImpl.java:75)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callEmbeddingProvider(TaskProcessor.java:599)
   at org.netbeans.modules.parsing.impl.SourceCache.getAllEmbeddings(SourceCache.java:322)
   at org.netbeans.modules.parsing.api.ResultIterator.getEmbeddings(ResultIterator.java:163)
   at org.netbeans.modules.web.common.api.WebUtils.getResultIterator(WebUtils.java:244)
   at org.netbeans.modules.html.editor.embedding.JsEmbeddingProvider$1.run(JsEmbeddingProvider.java:130)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:609)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:153)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:137)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:204)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:201)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:141)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:88)
Caused: org.netbeans.modules.parsing.spi.ParseException
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:209)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:104)
   at org.netbeans.modules.html.editor.embedding.JsEmbeddingProvider.getEmbeddings(JsEmbeddingProvider.java:127)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callEmbeddingProvider(TaskProcessor.java:599)
   at org.netbeans.modules.parsing.impl.SourceCache.refresh(SourceCache.java:366)
   at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.run(TaskProcessor.java:793)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:304)
   at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.execute(TaskProcessor.java:725)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:686)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   at org.openide.util.RequestProcessor$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)