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From elu...@apache.org
Subject svn commit: r1745169 - /httpd/httpd/trunk/docs/manual/mod/mod_proxy.xml
Date Mon, 23 May 2016 12:14:19 GMT
Author: elukey
Date: Mon May 23 12:14:19 2016
New Revision: 1745169

URL: http://svn.apache.org/viewvc?rev=1745169&view=rev
Log:
Adding a note to mod_proxy documentation to clarify DNS resolution with origin servers. Follow
up from a question on users@.

Modified:
    httpd/httpd/trunk/docs/manual/mod/mod_proxy.xml

Modified: httpd/httpd/trunk/docs/manual/mod/mod_proxy.xml
URL: http://svn.apache.org/viewvc/httpd/httpd/trunk/docs/manual/mod/mod_proxy.xml?rev=1745169&r1=1745168&r2=1745169&view=diff
==============================================================================
--- httpd/httpd/trunk/docs/manual/mod/mod_proxy.xml (original)
+++ httpd/httpd/trunk/docs/manual/mod/mod_proxy.xml Mon May 23 12:14:19 2016
@@ -303,6 +303,17 @@ ProxyPass "/examples" "http://backend.ex
       Members are added to a balancer using
       <directive module="mod_proxy">BalancerMember</directive>.</p>
 
+      <note><title>DNS resolution for origin domains</title>
+      <p>The DNS domain resolution happens when the socket to
+        the origin server is created for the first time.
+        When connection pooling is used, the DNS resolution is performed
+        again only when the <code>ttl</code> of the connection expires
+        (please check <directive module="mod_proxy">ProxyPass</directive>
+        parameters).
+        This means that httpd does not perform any DNS resolution caching.
+        </p>
+      </note>
+
     </section> <!-- /workers -->
 
     <section id="access"><title>Controlling Access to Your Proxy</title>



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