Program: 85476
Project: 85476
Buggy source:
public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response) throws Exception {
  MessageResources resources=getResources(request);
  ActionMessages errors=new ActionMessages();
  String username=request.getParameter("String_Node_Str");
  if (username == null) {
    log.warn("String_Node_Str");
    errors.add(ActionMessages.GLOBAL_MESSAGE,new ActionMessage("String_Node_Str",resources.getMessage("String_Node_Str")));
    saveErrors(request,errors);
    return mapping.findForward("String_Node_Str");
  }
  if (log.isDebugEnabled()) {
    log.debug("String_Node_Str");
  }
  ActionMessages messages=new ActionMessages();
  try {
    UserManager userMgr=(UserManager)getBean("String_Node_Str");
    User user=userMgr.getUser(username);
    StringBuffer msg=new StringBuffer();
    msg.append("String_Node_Str" + user.getPasswordHint());
    msg.append("String_Node_Str" + RequestUtil.getAppURL(request));
    SimpleMailMessage message=(SimpleMailMessage)getBean("String_Node_Str");
    message.setTo(user.getEmail());
    String subject=resources.getMessage("String_Node_Str") + resources.getMessage("String_Node_Str");
    message.setSubject(subject);
    message.setText(msg.toString());
    MailEngine mailEngine=(MailEngine)getBean("String_Node_Str");
    mailEngine.send(message);
    messages.add(ActionMessages.GLOBAL_MESSAGE,new ActionMessage("String_Node_Str",username,user.getEmail()));
    saveMessages(request,messages);
  }
 catch (  Exception e) {
    e.printStackTrace();
    errors.add(ActionMessages.GLOBAL_MESSAGE,new ActionMessage("String_Node_Str",username));
    saveErrors(request,errors);
  }
  return mapping.findForward("String_Node_Str");
}

Fixed version (ground truth):
public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response) throws Exception {
  MessageResources resources=getResources(request);
  ActionMessages errors=new ActionMessages();
  String username=request.getParameter("String_Node_Str");
  if (username == null) {
    log.warn("String_Node_Str");
    errors.add(ActionMessages.GLOBAL_MESSAGE,new ActionMessage("String_Node_Str",resources.getMessage("String_Node_Str")));
    saveErrors(request,errors);
    return mapping.findForward("String_Node_Str");
  }
  if (log.isDebugEnabled()) {
    log.debug("String_Node_Str");
  }
  ActionMessages messages=new ActionMessages();
  try {
    UserManager userMgr=(UserManager)getBean("String_Node_Str");
    User user=userMgr.getUser(username);
    StringBuffer msg=new StringBuffer();
    msg.append("String_Node_Str" + user.getPasswordHint());
    msg.append("String_Node_Str" + RequestUtil.getAppURL(request));
    SimpleMailMessage message=(SimpleMailMessage)getBean("String_Node_Str");
    message.setTo(user.getEmail());
    String subject=resources.getMessage("String_Node_Str") + resources.getMessage("String_Node_Str");
    message.setSubject(subject);
    message.setText(msg.toString());
    MailEngine mailEngine=(MailEngine)getBean("String_Node_Str");
    mailEngine.send(message);
    messages.add(ActionMessages.GLOBAL_MESSAGE,new ActionMessage("String_Node_Str",username,user.getEmail()));
    saveMessages(request.getSession(),messages);
  }
 catch (  Exception e) {
    e.printStackTrace();
    errors.add(ActionMessages.GLOBAL_MESSAGE,new ActionMessage("String_Node_Str",username));
    saveErrors(request,errors);
  }
  return mapping.findForward("String_Node_Str");
}