From 5f27a009ab50f6ed59a0512cd2103d9a55185585 Mon Sep 17 00:00:00 2001
From: WenFeiYi <wenfeiyi666@gmail.com>
Date: Wed, 29 Jul 2020 20:13:59 +0530
Subject: [PATCH] HBASE-24752 NPE/500 accessing webui on master startup

Closes #2148

Signed-off-by: Ted Yu <yuzhihong@gmail.com>
Signed-off-by: Viraj Jasani <vjasani@apache.org>
---
 .../org/apache/hadoop/hbase/tmpl/master/MasterStatusTmpl.jamon  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hbase-server/src/main/jamon/org/apache/hadoop/hbase/tmpl/master/MasterStatusTmpl.jamon b/hbase-server/src/main/jamon/org/apache/hadoop/hbase/tmpl/master/MasterStatusTmpl.jamon
index cdc216828c8f..19759b50b411 100644
--- a/hbase-server/src/main/jamon/org/apache/hadoop/hbase/tmpl/master/MasterStatusTmpl.jamon
+++ b/hbase-server/src/main/jamon/org/apache/hadoop/hbase/tmpl/master/MasterStatusTmpl.jamon
@@ -225,7 +225,7 @@ AssignmentManager assignmentManager = master.getAssignmentManager();
         <%if master.getAssignmentManager() != null %>
           <& AssignmentManagerStatusTmpl; assignmentManager=master.getAssignmentManager()&>
         </%if>
-        <%if !master.isInMaintenanceMode() %>
+        <%if !master.isInMaintenanceMode() && master.getMasterCoprocessorHost() != null %>
           <%if RSGroupUtil.isRSGroupEnabled(master.getConfiguration()) &&
             serverManager.getOnlineServersList().size() > 0 %>
             <section>