Tomcat Clustering With Apache-[warn] proxy: No protocol handler was valid for the URL /. If you are using a DSO version of mod_proxy

I am new to apache and tomcat, and trying to implement clustering with mod_proxy and able get run multiple tomcat instances but got stuck. Here is my config:

httpd.conf:

LoadModule proxy_module /usr/lib/apache2/modules/mod_proxy.so
LoadModule proxy_http_module /usr/lib/apache2/modules/mod_proxy_http.so
LoadModule proxy_module /usr/lib/apache2/modules/mod_proxy_ajp.so
LoadModule proxy_http_module /usr/lib/apache2/modules/mod_proxy_balancer.so
<Proxy balancer://testcluster stickysession=JSESSIONID>
BalancerMember ajp://localhost:8109 min=10 max=100 route=server1 loadfactor=1
BalancerMember ajp://localhost:8209 min=20 max=200 route=server2 loadfactor=1
</Proxy>
ProxyPass / balancer://testcluster/

When restarting apache its showing the following in error.log:

[Fri Feb 27 16:45:44 2015] [notice] Apache/2.2.22 (Ubuntu) configured -- resuming normal operations
[Fri Feb 27 16:46:48 2015] [warn] proxy: No protocol handler was valid for the URL /. If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.

And also my server.xml of two instances has set to jvmRoute="server1" and jvmRoute="server1"....

Solution 1:

I know this is an old question, but maybe the answer is helpful to others.

The module names of the last two loaded modules are wrong. mod_proxy_ajp.so is loaded as proxy_module and mod_proxy_balancer.so as proxy_http_module.

wrong:

LoadModule proxy_module /usr/lib/apache2/modules/mod_proxy_ajp.so
LoadModule proxy_http_module /usr/lib/apache2/modules/mod_proxy_balancer.so

right:

LoadModule proxy_ajp_module /usr/lib/apache2/modules/mod_proxy_ajp.so
LoadModule proxy_balancer_module /usr/lib/apache2/modules/mod_proxy_balancer.so