javax.servlet.ServletException: org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.onlineExam.dto.teacher.Teacher#8]
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:535)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:433)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
com.onlineExam.common.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:44)