List<ServerName> servers = master.getFServerManager()
.getOnlineServersList();
Set<ServerName> deadServers = master.getFServerManager().getDeadServers();
response.setContentType("text/html");
MasterStatusTmpl tmpl = new MasterStatusTmpl()
.setShowAppendWarning(shouldShowAppendWarning(conf))
.setServers(servers).setDeadServers(deadServers);
if (request.getParameter("filter") != null)
tmpl.setFilter(request.getParameter("filter"));
if (request.getParameter("format") != null)
tmpl.setFormat(request.getParameter("format"));
tmpl.render(response.getWriter(), master, admin);
}