grails run-app 随机抛出：java.lang.NoClassDefFoundError: Lorg/codehaus/groovy/grails/plugins/web/async/api/ControllersAsyncApi

Question

启动我的 grails 2.2.0 应用程序时，我随机收到如下错误消息，但它也随机成功启动而没有错误。 代码没有变化，我只是尝试多次运行grails dev run-app。

$ grails dev run-app

我之前也试过grails clean，但这没什么区别；错误仍然随机发生。

启动错误：

| Packaging Grails application.....
webxml.WebxmlGrailsPlugin Loading default config file: class DefaultWebXmlConfig
webxml.WebxmlGrailsPlugin Did not find application config file: WebXmlConfig
webxml.WebxmlGrailsPlugin Loading default config file: class DefaultWebXmlConfig
| Running Grails application
context.GrailsContextLoader [GrailsContextLoader] Loading context. Creating parent application context
context.ContextLoader Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pluginManager' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Invocation of init method failed; nested exception is java.lang.RuntimeException: Unable to locate constructor with Class parameter for class org.codehaus.groovy.grails.commons.DefaultGrailsControllerClass
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:680)
Caused by: java.lang.RuntimeException: Unable to locate constructor with Class parameter for class org.codehaus.groovy.grails.commons.DefaultGrailsControllerClass
    ... 5 more
Caused by: java.lang.reflect.InvocationTargetException
    ... 5 more
Caused by: java.lang.NoClassDefFoundError: Lorg/codehaus/groovy/grails/plugins/web/async/api/ControllersAsyncApi;
    at java.lang.Class.privateGetDeclaredFields(Class.java:2291)
    at java.lang.Class.getDeclaredFields(Class.java:1743)
    ... 5 more
Caused by: java.lang.ClassNotFoundException: org.codehaus.groovy.grails.plugins.web.async.api.ControllersAsyncApi
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    ... 7 more
context.GrailsContextLoader Error initializing the application: Error creating bean with name 'pluginManager' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Invocation of init method failed; nested exception is java.lang.RuntimeException: Unable to locate constructor with Class parameter for class org.codehaus.groovy.grails.commons.DefaultGrailsControllerClass
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pluginManager' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Invocation of init method failed; nested exception is java.lang.RuntimeException: Unable to locate constructor with Class parameter for class org.codehaus.groovy.grails.commons.DefaultGrailsControllerClass
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:680)
Caused by: java.lang.RuntimeException: Unable to locate constructor with Class parameter for class org.codehaus.groovy.grails.commons.DefaultGrailsControllerClass
    ... 5 more
Caused by: java.lang.reflect.InvocationTargetException
    ... 5 more
Caused by: java.lang.NoClassDefFoundError: Lorg/codehaus/groovy/grails/plugins/web/async/api/ControllersAsyncApi;
    at java.lang.Class.privateGetDeclaredFields(Class.java:2291)
    at java.lang.Class.getDeclaredFields(Class.java:1743)
    ... 5 more
Caused by: java.lang.ClassNotFoundException: org.codehaus.groovy.grails.plugins.web.async.api.ControllersAsyncApi
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    ... 7 more

环境：

• Mac OS X Lion
• JDK 1.6.0_31

类似的帖子，但仍然不同，因为我没有运行 Tomcat：

• Grails application running on Tomcat6 - Context initialization failed

Answer 1

将 servlet 版本从 3.0 更改为 2.5（反之亦然）后出现此异常。

我已通过键入以下内容解决了此问题：

grails clean
grails clean-all

已再次获取依赖项并开始运行应用程序。

Answer 2

尝试将您的 servlet 版本标记为 v3.0。我遇到了同样的零星问题，并通过迁移到 v.3.0 解决了它

文件：BuildConfig.groovy

grails.servlet.version = "3.0" // 根据目标容器合规性（2.5 或 3.0）更改

在 grails-plugin-async-2.2.0.jar 出现在类路径之后：

%HOME%.grails\ivy-cache\org.grails\grails-plugin-async\jars\

Answer 3

如果清理不起作用，请尝试手动删除目标。