Robin, Thanks a lot for your kind help. In fact, those were the ways that we were thinking to setup.
Thanks again for your cooperation :) Kind Regards, Josef Pullicino Systems Administrator GO GO Mobile, Fra Diego Street, Marsa, MRS 1501, Malta. t +356 2594 6827 f +356 2124 0112 w www.go.com.mt This email and any files or content transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. The Company and the originator of this email accept no liability for the content of this email, or for the consequences of any actions taken on the basis of the information provided, unless that information is subsequently confirmed in writing. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. Warning: Although the Company and the originator have taken reasonable precautions to ensure no viruses are present in this email, the company cannot accept responsibility for any loss or damage arising from the use of this email or attachments. -----Original Message----- From: Robin D. Wilson [mailto:rwils...@gmail.com] Sent: 12 March 2010 15:21 To: 'Tomcat Users List' Subject: RE: How to setup Tomcat Cluster - Help needed I can't recall exactly why we went with the channelSendOptions="6", but the docs are here: http://tomcat.apache.org/tomcat-6.0-doc/config/cluster.html Basically the '6' was to use synchronous replication. To get the receiver to stop 'auto' configuring on the loopback interface (lo0), we just hard-coded the IP address for each host's 'et0' interface in the receiver: <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" address="111.111.111.111" port="5000" selectorTimeout="100" maxThreads="6"/> (So you would change the '111.111.111.111' above to match the IP address of the host you are configuring.) The only downside to this is that you have to have a different 'server.xml' file for each host in the cluster. Once you get this up, and you have your '<distributable />' tag in your 'web.xml' you should be replicating sessions between the two hosts. We use an 'apache' setup to proxy (over AJP) to our tomcats, so in our testing we setup a load-balancing config from apache, and our simple test is to only enable 'tomcat 1' from apache, login - which should set the session on 'tomcat 1'. Then reset the apache so that 'tomcat 2' is the proxied host - and see if we're still logged in... That seemed to work for us. -- Robin D. Wilson Director of Web Development KingsIsle Entertainment, Inc. CELL: 512-426-3929 DESK: 512-623-5913 www.KingsIsle.com -----Original Message----- From: Josef Pullicino [mailto:josef.pullic...@go.com.mt] Sent: Friday, March 12, 2010 8:04 AM To: Tomcat Users List Subject: RE: How to setup Tomcat Cluster - Help needed Dear Robin, Thanks very much for your kind help and information provided below. Up till now, I copied the following configuration into the server.xml file of each of the two tomcats. The result is that each tomcat is being aware of each member added or deleted to/from each tomcat. So, I guess that the tomcats are communicating well in between them. <Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm2"> <!--For clustering, please take a look at documentation at: /docs/cluster-howto.html (simple how to) /docs/config/cluster.html (reference documentation) --> <!-- <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> --> <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="6"> <Manager className="org.apache.catalina.ha.session.BackupManager" expireSessionsOnShutdown="false" notifyListenersOnReplication="true" mapSendOptions="6"/> <!-- <Manager className="org.apache.catalina.ha.session.DeltaManager" expireSessionsOnShutdown="false" notifyListenersOnReplication="true"/> --> <Channel className="org.apache.catalina.tribes.group.GroupChannel"> <Membership className="org.apache.catalina.tribes.membership.McastService" address="228.0.0.4" port="45564" frequency="500" dropTime="3000"/> <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" address="auto" port="5000" selectorTimeout="100" maxThreads="6"/> <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter"> <Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender "/> </Sender> <Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetec tor"/> <Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch 15Interceptor"/> <Interceptor className="org.apache.catalina.tribes.group.interceptors.ThroughputInter ceptor"/> </Channel> <Valve className="org.apache.catalina.ha.tcp.ReplicationValve" filter=".*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt; "/> <Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer" tempDir="/tmp/war-temp/" deployDir="/tmp/war-deploy/" watchDir="/tmp/war-listen/" watchEnabled="false"/> <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/> </Cluster> With regards to your suggestions, what is the difference between "channelSendOptions" setting to '6' instead of '8'? Also, how did you setup the configuration so that it will not pick up the loopback (127.0.0.1) but using the eth0? Thanks a lot for your kind help provide. Really appreciated. Regards, Josef Pullicino Systems Administrator GO GO Mobile, Fra Diego Street, Marsa, MRS 1501, Malta. t +356 2594 6827 f +356 2124 0112 w www.go.com.mt This email and any files or content transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. The Company and the originator of this email accept no liability for the content of this email, or for the consequences of any actions taken on the basis of the information provided, unless that information is subsequently confirmed in writing. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. Warning: Although the Company and the originator have taken reasonable precautions to ensure no viruses are present in this email, the company cannot accept responsibility for any loss or damage arising from the use of this email or attachments. -----Original Message----- From: Robin D. Wilson [mailto:rwils...@gmail.com] Sent: 12 March 2010 14:12 To: 'Tomcat Users List' Subject: RE: How to setup Tomcat Cluster - Help needed This reference is what we used - it seemed to work fine for us: http://tomcat.apache.org/tomcat-6.0-doc/cluster-howto.html Don't forget to add this part: <distributable/> Into the 'web.xml' file from the ".war" files you want to use clustered sessions. In our environment, we have 4 ".war" files with various webapps we deploy. Only our 'ROOT.war' is "clustered" though. So it is the only ".war" file with the distributable tag in its web.xml. Also, we changed a few settings in the 'server.xml' file settings, such as: 1) Changed the "channelSendOptions" setting to '6' instead of '8'... 2) Increased some of the timeouts (we have a high-volume environment, and 4 clustered tomcats) 3) Removed the 'autobind' and manually set the IP addresses of the Receiver (it was picking the wrong interface - lo0 (127.0.0.1) instead of 'et0'...) Lastly, you need to change (at least) the port # for the "McastService" if you are running multiple clusters on the same network. (For example, all of our developers have their own "personal" clusters - so each of them uses a different 'port' for their cluster's multicast messages - this avoids cross-talk between their cluster and our main environment. Of course, our production environment is completely isolated from this - but when you are testing multiple environments, this can be confusing...) PS. We made adjustments to the DeltaManager and SessionManager code for some unique session issues we had - because we are using Tapestry, and it creates a session if there are any 'form' tags on a page. This meant that our site was creating a session for every visitor - which sort of overwhelmed the cluster (all sessions are supposed to be replicated to all cluster members - right?)... So our adjustments just keep certain sessions from wasting cluster bandwidth if they are of sufficiently short duration so as not to warrant replication. The best way to avoid this is to not create sessions that you don't really want replicated to all members of the cluster. -- Robin D. Wilson Director of Web Development KingsIsle Entertainment, Inc. CELL: 512-426-3929 DESK: 512-623-5913 www.KingsIsle.com -----Original Message----- From: Josef Pullicino [mailto:josef.pullic...@go.com.mt] Sent: Friday, March 12, 2010 3:30 AM To: Tomcat Users List Subject: How to setup Tomcat Cluster - Help needed Dear All, I would like to setup a tomcat cluster with 2 nodes. The configuration must be in a horizontal alignment, meaning that the two nodes are going to reside on two different machines. Any idea of how to set it up since the default tomcat help guide does not provide any configuration examples. Any help would be greatly appreciated. Thanks for your support, Regards, Josef Pullicino Systems Administrator GO GO Mobile, Fra Diego Street, Marsa, MRS 1501, Malta. t +356 2594 6827 f +356 2124 0112 w www.go.com.mt This email and any files or content transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. 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