Httpd returning 503 Service Unavailable with mod_proxy for Tomcat 8


I'm trying to integrate Tomcat with Apache. My aim is to redirect all the requests with http://localhost/myapp to http://localhost:8080

I followed this guide:

My httpd.conf looks like this:

Include conf.modules.d/*.conf
LoadModule proxy_module  modules/

ProxyPass         /myapp  http://localhost:8080 retry=0 timeout=5
ProxyPassReverse  /myapp  http://localhost:8080

My server.xml in apache-tomcat looks like this:

<Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" proxyPort="80" />

Now when I try the url http://localhost/myapp, it gives 503 Service Unavailable error.

Both Tomcat and Apache are up and running. The URL http://localhost:8080 works fine.

Can there be an issue with file permissions?

For tomcat the user and group are root/root and for httpd, the user and group are apache/apache

Am I missing something or am I doing it wrong?

Httpd version is 2.4.6 and Tomcat's version is 8.0

The httpd error logs:

[proxy:error] [pid 19905] (13)Permission denied: AH00957: HTTP: attempt to connect to (localhost) failed

[proxy:error] [pid 19905] AH00959: ap_proxy_connect_backend disabling worker for (localhost) for 0s

[proxy_http:error] [pid 19905] [client ::1:51615] AH01114: HTTP: failed to make connection to backend: localhost


The answer is here:

This question is tagged with apache tomcat

~ Asked on 2014-09-03 12:35:00

The Best Answer is


(Answered by the OP in a question edit. Converted to a community wiki answer. See Question with no answers, but issue solved in the comments (or extended in chat) )

The OP wrote:

The answer is here:

Which is a link to a blog that explains:

SELinux on RHEL/CentOS by default ships so that httpd processes cannot initiate outbound connections, which is just what mod_proxy attempts to do.

If this is the problem, it can be solved by running:

 /usr/sbin/setsebool -P httpd_can_network_connect 1

And for a more definitive source of information, see

~ Answered on 2015-01-28 20:08:26


this worked for me:

ProxyRequests     Off
ProxyPreserveHost On
RewriteEngine On

<Proxy http://localhost:8123>
Order deny,allow
Allow from all

ProxyPass         /node  http://localhost:8123  
ProxyPassReverse  /node  http://localhost:8123

~ Answered on 2017-01-17 00:59:00

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