Re: Session replication in tomcat5.5

[Phi-Long LE]

I had paste the mod_jk.dll in conf/modules..

What i m trying is
First i started the Apache and then Tomcat1,Tomcat2..
I run the html file in Tomcat1 and the given value is stored in session and
displays the same.
Then stop the Tomcat1..
If i run the same HTML i want to show the session value which is stored in
Tomcat instance1..
But i can not get the old session value..It will start new session only..
Session is not get replicated across Tomcat instances...
not sure to really understand what you try to do... load balancing a 
webapp or trying to have a standby tomcat in case of the first one 
crashes... well am not sure you can transfer a sessionID... never heard 
before about such possibilities....(anyway am still young in IT ;-)) the 
session should be binded to one tomcat instance (default: sticky_session 
is set to true)

Le 20/06/2007 12:32, Phi-Long LE a écrit :
did you try to add the address attribute within <connector> tag ?
something looks strange in your worker.properties i.e.

worker.tomcat1.lbfactor=1
worker.tomcat2.lbfactor=100
this two directive mean something like you will use 100 times tomcat2 
for 1 time tomcat1... if you want to use the two tomcat at the same 
load you should specify the same number

can we have your mod_jk.log at the apache startup ??
you should as well start tomcat first

Le 20/06/2007 11:10, shiva sha a écrit :
Hi I follwoed the below URLs...

http://tomcat.apache.org/tomcat-5.5-doc/cluster-howto.html
http://tomcat.apache.org/connectors-doc/reference/workers.html
http://tomcat.apache.org/connectors-doc/generic_howto/workers.html

But no luck.. Session is not get replicated..
This is my configuraion

Apache Version : 2.2.4
Tomcat Version : 5.5.17
JDK          :  1.6.0_01
Win 2000

workers.properties

worker.list=tomcat1,tomcat2,loadbalancer

# First tomcat server

worker.tomcat1.type=ajp13
worker.tomcat1.host=192.168.10.30
worker.tomcat1.port=8009
worker.tomcat1.lbfactor=1
worker.tomcat1.connection_pool_timeout=600
worker.tomcat1.socket_keepalive=1
worker.tomcat1.socket_timeout=60
worker.tomcat1.cachesize=20
worker.tomcat1.cache_timeout=180
worker.tomcat1.recycle_timeout=180

# Second tomcat server

worker.tomcat2.type=ajp13
worker.tomcat2.host=192.168.10.50
worker.tomcat2.port=9009
worker.tomcat2.lbfactor=1
worker.tomcat2.connection_pool_timeout=600
worker.tomcat2.socket_keepalive=1
worker.tomcat2.socket_timeout=60
worker.tomcat2.cachesize=20
worker.tomcat2.cache_timeout=180
worker.tomcat2.recycle_timeout=180

worker.tomcat2.lbfactor=100
worker.loadbalancer.type=lb
worker.loadbalancer.sticky_session=True
worker.loadbalancer.balance_workers=tomcat1,tomcat2

Below is the Tomcat1 server.xml.


<Server port="8005" shutdown="SHUTDOWN">

 <Listener className="org.apache.catalina.core.AprLifecycleListener" />
 <Listener 
className="org.apache.catalina.mbeans.ServerLifecycleListener"
/>
 <Listener className="
org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
 <Listener className="
org.apache.catalina.storeconfig.StoreConfigLifecycleListener"/>


 <GlobalNamingResources>


   <Environment name="simpleValue" type="java.lang.Integer" value="30"/>

   <Resource name="UserDatabase" auth="Container"
             type="org.apache.catalina.UserDatabase"
      description="User database that can be updated and saved"
          factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
         pathname="conf/tomcat-users.xml" />

 </GlobalNamingResources>

 <Service name="Catalina">

   <!-- Define a non-SSL HTTP/1.1 Connector on port 8080 -->
   <Connector port="8081" maxHttpHeaderSize="8192"
              maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
              enableLookups="false" redirectPort="8443" 
acceptCount="100"
              connectionTimeout="20000" disableUploadTimeout="true" />

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

   <!-- Define the top level container in our container hierarchy -->
   <Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat1">

     <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
            resourceName="UserDatabase"/>

     <!-- Define the default virtual host
          Note: XML Schema validation will not work with Xerces 2.2.
      -->
     <Host name="localhost" appBase="webapps"
      unpackWARs="true" autoDeploy="true"
      xmlValidation="false" xmlNamespaceAware="false">


       <Cluster 
className="org.apache.catalina.cluster.tcp.SimpleTcpCluster
"
                managerClassName="
org.apache.catalina.cluster.session.DeltaManager"
                expireSessionsOnShutdown="false"
                useDirtyFlag="true"
                notifyListenersOnReplication="true">

           <Membership
               
className="org.apache.catalina.cluster.mcast.McastService"
               mcastAddr="228.0.0.4"
               mcastBindAddress="192.168.10.30"
               mcastPort="45564"
               mcastFrequency="500"
               mcastDropTime="3000"/>

           <Receiver
               className="
org.apache.catalina.cluster.tcp.ReplicationListener"
               tcpListenAddress="auto"
               tcpListenPort="4001"
               tcpSelectorTimeout="100"
               tcpThreadCount="6"/>

           <Sender
               className="
org.apache.catalina.cluster.tcp.ReplicationTransmitter"
               replicationMode="pooled"
               ackTimeout="15000"
               waitForAck="true"/>

           <Valve className="
org.apache.catalina.cluster.tcp.ReplicationValve"

filter=".*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;"/> 


           <Deployer className="
org.apache.catalina.cluster.deploy.FarmWarDeployer"
                     tempDir="/tmp/war-temp/"
                     deployDir="/tmp/war-deploy/"
                     watchDir="/tmp/war-listen/"
                     watchEnabled="false"/>

           <ClusterListener className="
org.apache.catalina.cluster.session.ClusterSessionListener"/>
       </Cluster>


     </Host>

   </Engine>

 </Service>

</Server>

For Tomcat2 i had changed the below elements only..

<Server port="9005" shutdown="SHUTDOWN">
<Connector port="9081" maxHttpHeaderSize="8192"
              maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
              enableLookups="false" redirectPort="8443" 
acceptCount="100"
              connectionTimeout="20000" disableUploadTimeout="true" />

   <!-- Define an AJP 1.3 Connector on port 8009 -->
   <Connector port="9009"
              enableLookups="false" redirectPort="8443" 
protocol="AJP/1.3"
/>
<Membership
               
className="org.apache.catalina.cluster.mcast.McastService"
               mcastAddr="228.0.0.4"
               mcastBindAddress="192.168.10.50"
               mcastPort="45564"
               mcastFrequency="500"
               mcastDropTime="3000"/>

Program code..

I had designed a bean and servlet like this..

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import com.bean.SessionCart;

public class SessionStoreServlet extends HttpServlet
{


public synchronized void init (ServletConfig config) throws 
ServletException

{
       super.init();

}


public void doPost (HttpServletRequest req, HttpServletResponse res)
   throws ServletException, IOException
{

   StringBuffer HTML = new StringBuffer();
   res.setContentType("text/html");
   PrintWriter out = res.getWriter();
   SessionCart sc;
   HttpSession session = req.getSession(true);


       sc= new SessionCart();
       session.putValue("Cart",sc);

       String userName=req.getParameter("loginid");


       ((SessionCart)session.getValue("Cart")).setName(userName);

       out.println("Your account number is " +
((SessionCart)session.getValue("Cart")).getName());
   }

   }
and Bean is like this..

package com.bean;

public class SimpleBean implements java.io.Serializable {


   private String name = null;
   private int age = 0;


   public SimpleBean() {}

   public String getName() {
       return name;
   }

   public void setName(String s) {
       name = s;
   }

}

HTML like this

<form method="POST" action="servlet/SessionStoreServlet">
<input type="text" name="loginid" size="20"></p>
<input type="password" name="password" size="20"></td>
<td width="50%"><input type="submit" value="Submit" name="B1"></td>
     <td width="50%"><input type="reset" value="Reset" name="B2"></td>

I had paste the mod_jk.dll in conf/modules..

What i m trying is
First i started the Apache and then Tomcat1,Tomcat2..
I run the html file in Tomcat1 and the given value is stored in 
session and
displays the same.
Then stop the Tomcat1..
If i run the same HTML i want to show the session value which is 
stored in
Tomcat instance1..
But i can not get the old session value..It will start new session 
only..
Session is not get replicated across Tomcat instances...

Is there is any wrong in my steps?

Replication memebers are added sucessfully in both tomcat instances.. 
i.e,
replication member messages

are shown in Tomcats but session is not get replicated..

Pls help..
If possible give tested code and server.xml, workers.properties ..
Bcoz no one document is clear abor mod_jk..
I m confused ..
Thanks


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