java.lang.OutOfMemoryError: Java heap space
   at nu.validator.htmlparser.impl.CoalescingTreeBuilder.accumulateCharacters(CoalescingTreeBuilder.java:41)
   at nu.validator.htmlparser.impl.TreeBuilder.characters(TreeBuilder.java:866)
   at nu.validator.htmlparser.impl.ErrorReportingTokenizer.flushChars(ErrorReportingTokenizer.java:242)
   at nu.validator.htmlparser.impl.Tokenizer.stateLoop(Tokenizer.java:5792)
   at nu.validator.htmlparser.impl.Tokenizer.tokenizeBuffer(Tokenizer.java:1331)
   at nu.validator.htmlparser.io.Driver.runStates(Driver.java:316)
   at nu.validator.htmlparser.io.Driver.tokenize(Driver.java:216)
   at org.netbeans.modules.html.parser.Html5Parser.parse(Html5Parser.java:134)
   at org.netbeans.editor.ext.html.parser.api.SyntaxAnalyzerResult.doParseHtml(SyntaxAnalyzerResult.java:230)
   at org.netbeans.editor.ext.html.parser.api.SyntaxAnalyzerResult.parseHtml(SyntaxAnalyzerResult.java:177)
   at org.netbeans.modules.html.editor.api.gsf.HtmlParserResult.root(HtmlParserResult.java:133)
   at org.netbeans.modules.html.editor.indexing.HtmlFileModel.init(HtmlFileModel.java:148)
   at org.netbeans.modules.html.editor.indexing.HtmlFileModel.<init>(HtmlFileModel.java:101)
   at org.netbeans.modules.html.editor.indexing.HtmlIndexer.index(HtmlIndexer.java:82)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$3.run(Indexable.java:207)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:268)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:205)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.run(RepositoryUpdater.java:2385)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.run(RepositoryUpdater.java:2402)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:643)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:154)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:138)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:211)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:208)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:168)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:356)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:71)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:208)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.indexEmbedding(RepositoryUpdater.java:2352)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:2201)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$1500(RepositoryUpdater.java:1827)