-Dgrails.env not work in Tomcat

1. given a DataSoruce.groovy with 2 DB configuration.

environments {
development {
dataSource

{ dbCreate = "update" driverClassName = "com.mysql.jdbc.Driver" url = "jdbc:mysql://127.0.0.1/mydb?useUnicode=true&characterEncoding=utf-8" username = "test" password = "test" }

}
production {
dataSource

{ dbCreate = "update" driverClassName = "com.mysql.jdbc.Driver" url = "jdbc:mysql://127.0.0.1/mydb?useUnicode=true&characterEncoding=utf-8" username = "this_is_wrong_id" // give a invalid user name password = "this_is_wrong_pwd" // give a invliad pwd }

}
}

2. grails war mywar.war
3. add -Dgrails.env=development properties in Tomcat
(or set JAVA_OPTS=-Dgrails.env=development under OS environment.)
4. deploy mywar.war into tomcat
5. start tomcat
6. application start fail. (it seems ignore -Dgrails.env=development )
7. shutdown tomcat
8. grails -Dgrails.env=development war mywar.war
9. re-deploy mywar.war
10. start tomcat
11. application startup.