java.lang.OutOfMemoryError: Java heap space
   at org.netbeans.JarClassLoader$JarSource.resource(JarClassLoader.java:604)
   at org.netbeans.Archive.getData(Archive.java:212)
   at org.netbeans.JarClassLoader$JarSource.doGetResource(JarClassLoader.java:559)
   at org.netbeans.JarClassLoader$Source.getResource(JarClassLoader.java:357)
   at org.netbeans.JarClassLoader.findResource(JarClassLoader.java:292)
   at org.netbeans.ProxyClassLoader.getResourceImpl(ProxyClassLoader.java:358)
   at org.netbeans.ProxyClassLoader.getResource(ProxyClassLoader.java:303)
   at java.lang.ClassLoader.getResourceAsStream(ClassLoader.java:1341)
   at org.netbeans.modules.html.validation.patched.LocalCacheEntityResolver.getHtml5SpecAsStream(LocalCacheEntityResolver.java:71)
   at org.netbeans.modules.html.validation.ValidationTransaction.initialize(ValidationTransaction.java:351)
   at org.netbeans.modules.html.validation.ValidationTransaction.<init>(ValidationTransaction.java:418)
   at org.netbeans.modules.html.validation.ValidationTransaction.create(ValidationTransaction.java:169)
   at org.netbeans.modules.html.validation.ValidatorImpl.validate(ValidatorImpl.java:83)
   at org.netbeans.modules.html.editor.api.gsf.HtmlParserResult.getErrorsFromValidatorService(HtmlParserResult.java:294)
   at org.netbeans.modules.html.editor.api.gsf.HtmlParserResult.getValidationResults(HtmlParserResult.java:272)
   at org.netbeans.modules.html.editor.api.gsf.HtmlParserResult.getDiagnostics(HtmlParserResult.java:261)
   at org.netbeans.modules.html.editor.hints.HtmlRuleContext.<init>(HtmlRuleContext.java:84)
   at org.netbeans.modules.html.editor.hints.HtmlHintsProvider.computeErrors(HtmlHintsProvider.java:236)
   at org.netbeans.modules.html.editor.HtmlErrorFilter.filter(HtmlErrorFilter.java:104)
   at org.netbeans.modules.csl.core.ErrorFilterQuery.getFilteredErrors(ErrorFilterQuery.java:80)
   at org.netbeans.modules.csl.core.TLIndexerFactory$TLIndexer.index(TLIndexerFactory.java:284)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$3.run(Indexable.java:248)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:283)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:246)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:3048)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:3070)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:593)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:155)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:139)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:206)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:203)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)