java.lang.NoSuchMethodError: javax.servlet.ServletContext.getJspConfigDescriptor()Ljavax/servlet/descriptor/JspConfigDescriptor;
   at org.apache.jasper.compiler.JspConfig.processWebDotXml(JspConfig.java:104)
   at org.apache.jasper.compiler.JspConfig.init(JspConfig.java:194)
   at org.apache.jasper.compiler.JspConfig.findJspProperty(JspConfig.java:257)
   at org.apache.jasper.compiler.ExtractPageData.extractPageData(ExtractPageData.java:97)
   at org.apache.jasper.compiler.ExtractPageData.isXMLSyntax(ExtractPageData.java:77)
   at org.netbeans.modules.web.jspparser_ext.WebAppParseSupport.getJspOpenInfo(WebAppParseSupport.java:247)
   at org.netbeans.modules.web.jspparser.JspParserImpl.getJspOpenInfo(JspParserImpl.java:183)
   at org.netbeans.modules.web.core.jsploader.TagLibParseSupport.getCachedOpenInfo(TagLibParseSupport.java:269)
   at org.netbeans.modules.web.core.jsploader.JspDataObject.updateFileEncoding(JspDataObject.java:218)
   at org.netbeans.modules.web.core.jsploader.BaseJspEditorSupport.checkFileEncoding(BaseJspEditorSupport.java:354)
   at org.netbeans.modules.web.core.jsploader.BaseJspEditorSupport.saveDocument(BaseJspEditorSupport.java:342)
   at org.netbeans.modules.web.core.jsploader.BaseJspEditorSupport.saveDocument(BaseJspEditorSupport.java:332)
   at org.netbeans.modules.web.core.jsploader.BaseJspEditorSupport$5.save(BaseJspEditorSupport.java:301)
   at org.netbeans.core.NbLifecycleManager.saveAll(NbLifecycleManager.java:90)
   at org.apache.tools.ant.module.run.TargetExecutor.run(TargetExecutor.java:454)
   at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:154)