Index: src/main/java/org/apache/hadoop/hbase/regionserver/RSStatusServlet.java =================================================================== --- src/main/java/org/apache/hadoop/hbase/regionserver/RSStatusServlet.java (revision 1573968) +++ src/main/java/org/apache/hadoop/hbase/regionserver/RSStatusServlet.java (working copy) @@ -52,7 +52,7 @@ tmpl.setFormat(req.getParameter("format")); if (req.getParameter("filter") != null) tmpl.setFilter(req.getParameter("filter")); - tmpl.render(resp.getWriter(), hrs); + if (hrs != null) tmpl.render(resp.getWriter(), hrs); } }