Index: org/apache/catalina/manager/host/HostManagerServlet.java
===================================================================
--- org/apache/catalina/manager/host/HostManagerServlet.java	(revision 831814)
+++ org/apache/catalina/manager/host/HostManagerServlet.java	(working copy)
@@ -551,7 +551,7 @@
             Host host = (Host) hosts[i];
             String name = host.getName();
             String[] aliases = host.findAliases();
-            StringBuffer buf = new StringBuffer();
+            StringBuilder buf = new StringBuilder();
             if (aliases.length > 0) {
                 buf.append(aliases[0]);
                 for (int j = 1; j < aliases.length; j++) {
Index: org/apache/catalina/manager/host/HTMLHostManagerServlet.java
===================================================================
--- org/apache/catalina/manager/host/HTMLHostManagerServlet.java	(revision 831814)
+++ org/apache/catalina/manager/host/HTMLHostManagerServlet.java	(working copy)
@@ -258,7 +258,7 @@
                 args = new Object[2];
                 args[0] = RequestUtil.filter(hostName);
                 String[] aliases = host.findAliases();
-                StringBuffer buf = new StringBuffer();
+                StringBuilder buf = new StringBuilder();
                 if (aliases.length > 0) {
                     buf.append(aliases[0]);
                     for (int j = 1; j < aliases.length; j++) {