加载插件管理器时出错：无法创建类的新实例[org.codehaus.groovy.grails.plugins.web.mapping.UrlMappingsGrailsPlugin]

Question

收到有关在尝试创建grails插件时在Grails中加载UrlMappings插件的错误消息项目并使用以下命令：

grails create-plugin user-management

然后在用户管理项目：

grails create-pom xxx.xxxxx

mvn grails:run-app

我查看了Error loading UrlMappingsPlugin中描述的建议解决方案，该解决方案并未解决我的问题。有关系统

详情行家信息：

Apache Maven 3.2.1 (ea8b2b07643dbb1b84b6d16e1f08391b666bc1e9; 2014-02-15T04:37:52+10:00) 
Maven home: /usr/local/Cellar/maven/3.2.1/libexec 
Java version: 1.7.0_71, vendor: Oracle Corporation 
Java home: /Library/Java/JavaVirtualMachines/jdk1.7.0_71.jdk/Contents/Home/jre 
Default locale: en_US, platform encoding: UTF-8 
OS name: "mac os x", version: "10.10", arch: "x86_64", family: "mac" 

请找到完整的错误信息如下：

[INFO] Scanning for projects... 
[WARNING] 
[WARNING] Some problems were encountered while building the effective model for xxx.xxxxx:user-management:grails-plugin:0.1-SNAPSHOT 
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-surefire-plugin is missing. @ line 74, column 21 
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build. 
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects. 
[WARNING] 
[INFO] 
[INFO] Using the builder org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder with a thread count of 1 
[INFO] 

[INFO] ------------------------------------------------------------------------ 
[INFO] Building user-management 0.1-SNAPSHOT 
[INFO] ------------------------------------------------------------------------ 
[INFO] 
[INFO] --- grails-maven-plugin:2.4.4:run-app (default-cli) @ user-management --- 
|Loading Grails 2.4.4 
|Configuring classpath 
|Running pre-compiled script 
. 
|Environment set to development 
................................. 
|Packaging Grails application 
.....................Error 
| 
Error loading plugin manager: Could not create a new instance of class [org.codehaus.groovy.grails.plugins.web.mapping.UrlMappingsGrailsPlugin]! (Use --stacktrace to see the full trace) 

Answer 1

这似乎已经固定了Apache Maven的3.2.3如现在一切工作正常没有任何错误。