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HBASE-30286 HTTP ERROR 500 when opening master ui if active master is not yet available during startup (#8471) #8478

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Merged
Apache9 merged 1 commit into from
Jul 17, 2026
+9 −3
Merged

HBASE-30286 HTTP ERROR 500 when opening master ui if active master is not yet available during startup (#8471) #8478

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12 changes: 9 additions & 3 deletions hbase-server/src/main/resources/hbase-webapps/master/backupMasterStatus.jsp
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Original file line number Diff line number Diff line change
Expand Up @@ -20,23 +20,29 @@
<%@ page contentType="text/html;charset=UTF-8"
import="java.util.*"
import="org.apache.hadoop.hbase.ServerName"
import="org.apache.hadoop.hbase.master.HMaster"
import="org.apache.hbase.thirdparty.com.google.common.base.Preconditions" %>
import="org.apache.hadoop.hbase.master.HMaster" %>
<%
HMaster master = (HMaster) getServletContext().getAttribute(HMaster.MASTER);
if (!master.isActiveMaster()) {

ServerName active_master = master.getActiveMaster().orElse(null);
Preconditions.checkState(active_master != null, "Failed to retrieve active master's ServerName!");
int activeInfoPort = master.getActiveMasterInfoPort();
%>
<div class="row inner_header">
<div class="page-header">
<h1>Backup Master <small><%= master.getServerName().getHostname() %></small></h1>
</div>
</div>
<% if (active_master != null) { %>
<h4>Current Active Master: <a href="//<%= active_master.getHostname() %>:<%= activeInfoPort %>/master.jsp"
target="_blank"><%= active_master.getHostname() %></a></h4>
<% } else { %>
<div id="initializing-info">
<h4>Cluster is starting, active master not yet elected</h4>
<p>No active master has been found. This is normal during cluster startup or master failover.
Please refresh manually in a few seconds.</p>
</div>
<% } %>
<% } else { %>
<h2>Backup Masters</h2>

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