grails - 如何使用Servlet 2.5运行Grails 2.4.1

Question

Grails 2.4.1版是最近发布的。修复的错误之一是恢复使用Servlet 2.5版的功能。参见https://jira.grails.org/browse/GRAILS-11466

我创建了一个新的grails应用。无需更改任何内容，我便可以对其进行编译和运行。当我将grails.servlet.version更改为“2.5”时，我可以进行编译，但是当我运行它时，出现了以下堆栈跟踪错误。

有谁知道我是否需要更改其他设置才能使Grails 2.4.1在Servlet 2.5容器上运行？具体来说，tomcat 6。

Error loading plugin manager: Unable to locate constructor with Class parameter for class org.codehaus.groovy.grails.commons.DefaultGrailsControllerClass (NOTE: Stack trace has been filtered. Use --verbose to see entire trace.)
java.lang.RuntimeException: Unable to locate constructor with Class parameter for class org.codehaus.groovy.grails.commons.DefaultGrailsControllerClass
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1612)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1549)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:684)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4973)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
Caused by: java.lang.reflect.InvocationTargetException
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrConstructorNewInstance(ReflectiveInterceptor.java:1002)
    ... 19 more
Caused by: java.lang.NoClassDefFoundError: Lorg/codehaus/groovy/grails/plugins/web/async/api/ControllersAsyncApi;
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlClassGetDeclaredFields(ReflectiveInterceptor.java:1593)
    ... 20 more
Caused by: java.lang.ClassNotFoundException: org.codehaus.groovy.grails.plugins.web.async.api.ControllersAsyncApi
    ... 21 more
Error |
Error loading plugin manager: Unable to locate constructor with Class parameter for class org.codehaus.groovy.grails.commons.DefaultGrailsControllerClass
Error |
Forked Grails VM exited with error

Process finished with exit code 1

Answer 1

如果将版本更改为2.5后在运行Grails之前未执行grails clean，则会发生此错误

发生的情况是，当版本为3.0时，Grails将额外的依赖项添加到类路径中，从而导致新行为被添加到已编译的类中。

如果您随后将版本更改为2.5并仅执行run-app，则额外的依赖项将消失，但是新行为仍将编译到类中。进行clean可解决此问题。