如何使用Grails WebXmlConfig插件將屬性添加到WEB.XML文件？

Question

我正在使用Grails的WebXmlConfig Plugin。我使用插件的版本1.4.1。我做了：

grails create-web-xml-config 

生成grails-app/conf/WebXmlConfig.groovy文件。當我嘗試添加一個簡單的屬性，如：

sessionConfig.sessionTimeout = 30 

我得到以下錯誤：

java.lang.IllegalArgumentException: <session-config> element is limited to 1 occurrence 
at org.apache.catalina.startup.SetSessionConfig.begin(WebRuleSet.java:769) 
at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1276) 
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source) 
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source) 
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source) 
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) 
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) 
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) 
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) 
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) 
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) 
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1537) 
at org.apache.catalina.startup.ContextConfig.parseWebXml(ContextConfig.java:1890) 
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1259) 
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878) 
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:369) 
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) 
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90) 
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5269) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) 
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) 
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) 
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) 
at java.util.concurrent.FutureTask.run(FutureTask.java:166) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
at java.lang.Thread.run(Thread.java:722) 

當我做的Grails安裝模板，並從生成的web.xml文件中刪除會話超時則有用。如何在不修改原始web.xml的情況下配置WebXmlConfig.groovy？

Answer 1

爲什麼不只是使用grails install-templates並修改默認的web.xml文件，作爲解決方法？