Re: Resin 3.0.6 TCP Sessions Problem Please Advise

Chris Wilson wrote:

> Hello,
>
> I continue to have problems getting distributed sessions to work in
> Resin 3.0.6 where they worked perfectly on Resin 2.x.
>  
You can try the snaphot or set an explicit <host id="localhost"/>.  
Resin 3.0.6 is treating the two requests as two different virtual hosts: 
localhost:8080 and localhost:8081 and therefore not sharing.  (The 
virtual host issue is only for the purposes of the distributed 
sessions.  The other virtual hosting is fine.)

- Scott

> I have created a minimal test application to attempt to get session
> replication at least working on the *same machine*!
>
> I am attempting to run two instances of Resin on the same machine at
> different ports (http 8080 & 8081).  I have disabled session cookies and
> am using URL encoding so that I can easily switch between server
> instances by merely changing the port in address bar.  Since the session
> id is in the URL and if distributed sessions are working properly I
> should see the exact same session contents on both servers as I switch
> between servers.
>
> The sequence I follow is this.
>
> 1) Start server a
> 2) Start server b
> 3) Access server a at: http://localhost:8080/cluster/index.jsp
> 4) Put a few values in the session using the JSP
> 5) Since URL encoding is on, URL ends up being something like:
> http://localhost:8080/cluster/index.jsp;jsessionid=afHdQ3T1wHIf
> 6) Change port to 8081 in address bar to access server b; leave the rest
> of the URL the same, hit enter.
>
> I should see the same session information on server b since the session
> id is the same, however, the session data is empty.
>
> If I try the reverse--accessing server b first with a fresh session and
> then moving to server a--the same thing happens.  Order doesn't seem to
> be an issue...
>
> What am I doing wrong here? 
>
> I have the following resin.conf
>
> --------------------------------------------------------
>
> <resin xmlns="http://caucho.com/ns/resin";>
>  <log name='com.caucho.server.cluster' level='all' path='stdout:'
> timestamp='[%H:%M:%S.%s] '/>
>  <log name='com.caucho.server.session' level='all' path='stdout:'
> timestamp='[%H:%M:%S.%s] '/>
>  <log name='com.caucho.server.hmux.HmuxClusterRequest' level='all'
>         path='stdout:' timestamp='[%H:%M:%S.%s] '/>
>  <log name='com.caucho.server.hmux.HmuxDispatchRequest' level='all'
>         path='stdout:' timestamp='[%H:%M:%S.%s] '/>
>  <log name='' level='info' path='stdout:' timestamp='[%H:%M:%S.%s] '/>
>  <log name='com.caucho.java' level='fine' path='stdout:'
>       timestamp='[%H:%M:%S.%s] '/>
>  <log name='com.caucho.loader' level='config' path='stdout:'
>       timestamp='[%H:%M:%S.%s] '/>
>
>  <dependency-check-interval>2s</dependency-check-interval>
>
>  <javac compiler="internal" args=""/>
>
>  <thread-pool>
>    <thread-max>200</thread-max>
>    <spare-thread-min>25</spare-thread-min>
>  </thread-pool>
>  
>
>  <server>
>    <class-loader>
>      <tree-loader path="$resin-home/lib"/>
>    </class-loader>
>
>    <!-- The http port -->
>    <http id="a" host="127.0.0.1" port="8080"/>
>    <http id="b" host="127.0.0.1" port="8081"/>
>
>    <cluster>
>      <srun id="a" host="127.0.0.1" port="6802" index="1"/>
>      <srun id="b" host="127.0.0.1" port="6803" index="2"/>
>      <cluster-store type="tcp">
>        <init>
>          <!-- store seessions for each server instance in a different
>            directory since both instances are running on the same
> machine
>         and we dont want persistent storage to collide -->
>          <path>${serverId}-sessions</path>
>        </init>
>        </cluster-store>
>      
>    </cluster>
>
>    <ignore-client-disconnect>true</ignore-client-disconnect>
>    <case-insensitive>false</case-insensitive>
>
>    <resin:include path="app-default.xml"/>
>
>   <host id="">
>   
>      <web-app id="/cluster">
>      <document-directory>webapps/cluster</document-directory>
>      <session-config
>         enable-cookies="false"
>             enable-url-rewriting="true">
>             <cluster-store/>
>           </session-config>
>           <context-param server-id="${serverId}"/>
>      </web-app>
>   
>    </host>
>  </server>
> </resin>
>
> ------------------------------------------------------
>
> webapps/cluster/index.jsp
>
> ------------------------------------------------------
>
> <%@ page import="java.util.*" %>
> <%
>         boolean isSubmit = request.getParameter("submit") != null;
>         String newKey = request.getParameter("key");
>         String newValue = request.getParameter("value");
>         if(isSubmit && newKey.trim().length() > 0) {
>                 session.setAttribute(newKey, newValue);
>         }
>         
>         String deleteKey = request.getParameter("delete");
>         if(deleteKey != null) {
>                 session.removeAttribute(deleteKey);
>         }
>         
>         if(request.getParameter("invalidate") != null) {
>                 session.invalidate();
>         
> response.sendRedirect(response.encodeRedirectURL("index.jsp"));
>         }
> %>
> <html>
> <head>
> <title>Session Test</title>
> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
> </head>
>
> <body>
> <p>Current Session:</p>
> <p>
> <%
>         Enumeration e = session.getAttributeNames();
>         while(e.hasMoreElements()) {
>                 String key = (String)e.nextElement();
>                 String value = (String)session.getAttribute(key);
> %>
> <%= key %>: <%= value %> <a href="<%=
> response.encodeURL("index.jsp?delete=" + key) %>">[delete]</a><br>
> <% } %>
> </p>
> <form name="form" method="post" action="<%=
> response.encodeURL("index.jsp") %>">
> <p>Key: 
>    <input name="key" type="text" id="key">
>    <br>
>    Value: 
>    <input name="value" type="text" id="value">
> </p>
> <p>
>  <input type="submit" name="submit" value="Submit">
> </p>
> </form>
> <p>
> <a href="<%= response.encodeURL("index.jsp?invalidate=x")
> %>">Invalidate</a>
> </p>
> <p><a href="<%= response.encodeURL("index.jsp") %>">Reload</a> </p>
> <p>Server ID: <%= application.getInitParameter("server-id") %></p>
> </body>
> </html>
>
> ----------------------------------------------
>
> Environment:
>
> Sun JDK 1.4.2
> Windows XP
> Resin 3.0.6
>
> Could someone please try this and see if they can either get it to work
> or duplicate my failure?  Up to this point I have been unable to get
> Resin 3.0.6 to correctly cluster using any configuration.  This is the
> simplest clustering setup I could come up with.  If this setup does not
> cluster as configured, why?  What is wrong?  Shouldn't this *at least*
> work?
>
> Thanks for any help.
>
> Chris Wilson
>
> Web Developer
> Andrews University
> cwilson@xxxxxxxxxxx
> http://www.andrews.edu/~cwilson/pgp/
>
>
>