Weird Grails Deployment Problem — MissingMethodException yada yada

We host Remotespots on a Tomcat 6 server on eapps. As we changed the UI design, we deployed a new version of it yesterday, but the scaffold views seems broken with the following error:

Error 500: Executing action [list] of controller [app.InvitationCodeController] caused exception: groovy.lang.MissingMethodException: No signature of method: static app.InvitationCode.list() is applicable for argument types: (org.codehaus.groovy.grails.web.servlet.mvc.GrailsParameterMap) values: [[action:list, controller:invitationCode, max:10]]
Servlet: grails
URI: /app/grails/invitationCode/list.dispatch
Exception Message: No signature of method: static app.InvitationCode.list() is applicable for argument types: (org.codehaus.groovy.grails.web.servlet.mvc.GrailsParameterMap) values: [[action:list, controller:invitationCode, max:10]]
Caused by: No signature of method: static app.InvitationCode.list() is applicable for argument types: (org.codehaus.groovy.grails.web.servlet.mvc.GrailsParameterMap) values: [[action:list, controller:invitationCode, max:10]]
Class: script12814638559751136092009
At Line: [13]

With the Stack Trace:

groovy.lang.MissingMethodException: No signature of method: static app.InvitationCode.list() is applicable for argument types: (org.codehaus.groovy.grails.web.servlet.mvc.GrailsParameterMap) values: [[action:list, controller:invitationCode, max:10]]

	at app.InvitationCodeController$_closure2.doCall(script12814638559751136092009.groovy:13)

	at app.InvitationCodeController$_closure2.doCall(script12814638559751136092009.groovy)

	at org.apache.shiro.web.servlet.ShiroFilter.executeChain(ShiroFilter.java:687)

	at org.apache.shiro.web.servlet.ShiroFilter.doFilterInternal(ShiroFilter.java:616)

	at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:81)

	at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)

	at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)

	at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:769)

	at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:698)

	at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:891)

	at java.lang.Thread.run(Thread.java:619)

Although it runs on the local server grails run-app, the same problem occurs with grails run-war, and also on the Tomcat 6 on eapps. So after a little Googling, here is the magical solution:

grails clean

This solves the problem

These are the links that can help:

• http://jira.codehaus.org/browse/GRAILS-4951?focusedCommentId=231632#action_231632
• http://www.pubbs.net/201002/grails/62508-grails-user-no-signature-of-method-issue-with-list.html
• Yada yada