Application metadata not found, please run: grails upgrade
|Loading Grails 2.2.5
|Configuring classpath
.
|Environment set to development
.......
|Application metadata not found, please run: grails upgrade
Process finished with exit code 1
运行grails项目出错，不知道怎么回事，看不出错来，metadata不知道是什么。
------解决方案--------------------
在Grails_home目录下
运行 grails upgrade 命令