i am facing a problem in clustering the tomcat with apache as a loadbalancer using mod_jk on ubuntu.

i have install apache2 on my ubuntu 11.04 and i have downloaded tomcat7 created two copies and kept them at two different location.

1st one is at /home/net4u/vishal/test/tomcatA

2nd one is at /home/net4u/vishal/test1/tomcatB

i have made following changes to server.xml file in /conf folder

1. <Server port="8205" shutdown="SHUTDOWN">

2. <Connector port="8280" protocol="HTTP/1.1" 
           connectionTimeout="20000" 
           redirectPort="8443" />

3.<Connector port="8209" protocol="AJP/1.3" redirectPort="8443" />
 <Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcatB">

4.  <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>

similarly i have modified other tomcat i.e tomcatA server.xml

content of the server.xml is as follow:

-->

<!--The connectors can use a shared executor, you can define one or more named thread pools-->
<!--
<Executor name="tomcatThreadPool" namePrefix="catalina-exec-" 
    maxThreads="150" minSpareThreads="4"/>
-->


<!-- A "Connector" represents an endpoint by which requests are received
     and responses are returned. Documentation at :
     Java HTTP Connector: /docs/config/http.html (blocking & non-blocking)
     Java AJP  Connector: /docs/config/ajp.html
     APR (HTTP/AJP) Connector: /docs/apr.html
     Define a non-SSL HTTP/1.1 Connector on port 8080
-->
<Connector port="8280" protocol="HTTP/1.1" 
           connectionTimeout="20000" 
           redirectPort="8443" />
<!-- A "Connector" using the shared thread pool-->
<!--
<Connector executor="tomcatThreadPool"
           port="8080" protocol="HTTP/1.1" 
           connectionTimeout="20000" 
           redirectPort="8443" />
-->           
<!-- Define a SSL HTTP/1.1 Connector on port 8443
     This connector uses the JSSE configuration, when using APR, the 
     connector should be using the OpenSSL style configuration
     described in the APR documentation -->
<!--
<Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true"
           maxThreads="150" scheme="https" secure="true"
           clientAuth="false" sslProtocol="TLS" />
-->

<!-- Define an AJP 1.3 Connector on port 8009 -->
<Connector port="8109" protocol="AJP/1.3" redirectPort="8443" />


<!-- An Engine represents the entry point (within Catalina) that processes
     every request.  The Engine implementation for Tomcat stand alone
     analyzes the HTTP headers included with the request, and passes them
     on to the appropriate Host (virtual host).
     Documentation at /docs/config/engine.html -->

<!-- You should set jvmRoute to support load-balancing via AJP ie :
<Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">         
--> 
<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcatB">

  <!--For clustering, please take a look at documentation at:
      /docs/cluster-howto.html  (simple how to)
      /docs/config/cluster.html (reference documentation) -->
  <!-- uncomment for clustering-->
  <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>


  <!-- Use the LockOutRealm to prevent attempts to guess user passwords
       via a brute-force attack -->
  <Realm className="org.apache.catalina.realm.LockOutRealm">
    <!-- This Realm uses the UserDatabase configured in the global JNDI
         resources under the key "UserDatabase".  Any edits
         that are performed against this UserDatabase are immediately
         available for use by the Realm.  -->
    <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
           resourceName="UserDatabase"/>
  </Realm>

  <Host name="localhost"  appBase="webapps"
        unpackWARs="true" autoDeploy="true">

    <!-- SingleSignOn valve, share authentication between web applications
         Documentation at: /docs/config/valve.html -->
    <!--
    <Valve className="org.apache.catalina.authenticator.SingleSignOn" />
    -->

    <!-- Access log processes all example.
         Documentation at: /docs/config/valve.html
         Note: The pattern used is equivalent to using pattern="common" -->
    <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"  
           prefix="localhost_access_log." suffix=".txt"
           pattern="%h %l %u %t &quot;%r&quot; %s %b" resolveHosts="false"/>

  </Host>
</Engine>

i have install libapache2-mod-jk

step 1. i have Created jk.load file in /etc/apache2/mods-enabled/jk.load

content is as follows:

LoadModule jk_module /usr/lib/apache2/modules/mod_jk.so
Create /etc/apache2/mods-enabled/jk.conf:
JkWorkersFile /etc/apache2/workers.properties
JkLogFile /var/log/apache2/jk.log
JkMount /ecommerce/* worker1
JkMount /images/* worker1
JkMount /content/* worker1

step 2. Created workers.properties file in /etc/apache2/workers.properties

content is as follows:

workers.tomcat_home=/home/vishal/Desktop/test/tomcatA workers.java_home=/usr/lib/jvm/default-java ps=/ worker.list=tomcatA,tomcatB,loadbalancer  

worker.tomcatA.port=8109 worker.tomcatA.host=localhost worker.tomcatA.type=ajp13 worker.tomcatA.lbfactor=1  

 worker.tomcatB.port=8209
 worker.tomcatB.host=localhost
 worker.tomcatB.type=ajp13
 worker.tomcatB.lbfactor=1

 worker.loadbalancer.type=lb 
 worker.loadbalancer.balanced_workers=tomcatA,tomcatB
 worker.loadbalancer.sticky_session=1

i tried the same thing on the windows machine it is working.