Caused by: java.lang.IllegalArgumentException: Cookie name "path" is a reserved token

i am getting the below error when trying to access or open the UI page (developed using flex) .it was properly working in tomcat version. recently migrated from tomcat to wildfly 8.0.0 Final.

Caused by: java.lang.IllegalArgumentException: Cookie name "path" is a reserved token
at javax.servlet.http.Cookie.<init>(Cookie.java:192)
at io.undertow.servlet.spec.HttpServletRequestImpl.getCookies(HttpServletRequestImpl.java:145)
at com.ap.ca.mm.util.SessionUtils.getSessionManagerPrincipal(SessionUtils.java:128)
at com.ap.ca.mm.util.SessionUtils.getRmpPrincipalFromSessionManagerBean(SessionUtils.java:166)
at com.ap.ca.mm.util.SessionUtils.getRmpPrincipal(SessionUtils.java:96)
at com.ap.ca.mm.ro.dao.csdb.EntityDAO.<init>(EntityDAO.java:149)
... 42 more