1 2 Previous Next 18 Replies Latest reply on Sep 28, 2002 11:01 AM by Thomas Peuss

    HTTP Cluster with Catalina

    Bani Greyling Newbie

      Hi

      Can someone give some indication of how to set up distributed catalina on JBoss_3.0.1-Tomcat_4.0.4.

      I uncommented "SnapshotMode" and "SnapshotInterval" in "tomcat4-service.xml and I have added "" in my web.xml. It then give me the error:
      INFO [EmbeddedCatalinaServiceSX] ClusteredHTTPSessionService not found
      ERROR [EmbeddedCatalinaServiceSX] Failed to setup clustering, clustering disabled

      Thnx
      Bani

        • 1. Re: HTTP Cluster with Catalina
          Dorothy Gantenbein Newbie

          Hi -

          Make sure that you add /docs/examples/clustering/jbossha-httpsession.sar to your deploy directory.

          Dorothy

          • 2. HTTP Cluster with Catalina
            Bani Greyling Newbie

            Thanks, jbossha-httpsession.sar got rid of my initial error.

            I got the ClusteredHTTPSessionService up and running. But now my session does not seem to get replicated to my second instance on another machine. Any idea what I must do to get it replicating.

            Thanks

            • 3. Re: HTTP Cluster with Catalina
              Jorju Newbie

              Hi all,

              does jbossha-httpsession.sar work ok ? (i believe not)

              I've got the ClusteredHTTPSessionService up and running.

              But session does not get replicated !!!

              (I'm running 2 Jboss-3.0.1/tomcat-4.0.4 bundle on LinuxRH)

              and session replication works well with both of these
              tomcats (the ones bundled with jboss)!!! (using javagroups.jar v2.1, tomcat-javagroups.jar and UDP protocol stack for InMemoryReplicationManager)

              i've tried all possible combinations with both
              jboss (and their tomcat4-service.xml) but seems like JBoss handles by itself session replication
              (through jbossha-httpsession.sar) witn no success (and
              worst, with no logs, traces that explain such a session replication problem)

              additionally,
              putting distributable property in web.xml will cause
              to loose session afinity ! (loosing sticky sessions)
              (and session still won't replicate !!!)

              Is anyone in a similar situation ?
              Does someone know what is happening with jbossha-httpsession.sar ?

              Thanks in advance

              • 4. Re: HTTP Cluster with Catalina
                Jorju Newbie

                Hi all,

                does jbossha-httpsession.sar work ok ? (i believe not)

                I've got the ClusteredHTTPSessionService up and running.

                But session does not get replicated !!!

                (I'm running 2 Jboss-3.0.1/tomcat-4.0.4 bundle on LinuxRH)

                and session replication works well with both of these
                tomcats (the ones bundled with jboss)!!! (using javagroups.jar v2.1, tomcat-javagroups.jar and UDP protocol stack for InMemoryReplicationManager)

                i've tried all possible combinations with both
                jboss (and their tomcat4-service.xml) but seems like JBoss handles by itself session replication
                (through jbossha-httpsession.sar) witn no success (and
                worst, with no logs, traces that explain such a session replication problem)

                additionally,
                putting distributable property in web.xml will cause
                to loose session afinity ! (loosing sticky sessions)
                (and session still won't replicate !!!)

                Is anyone in a similar situation ?
                Does someone know what is happening with jbossha-httpsession.sar ?

                Thanks in advance

                • 5. Re: HTTP Cluster with Catalina
                  Thomas Peuss Newbie

                  I need your server.log for a deeper analisys....

                  CU
                  Thomas

                  • 6. Re: HTTP Cluster with Catalina
                    Thomas Peuss Newbie

                    I need your server.log for a deeper analysis...

                    CU
                    Thomas

                    • 7. Re: HTTP Cluster with Catalina
                      Thomas Peuss Newbie

                      Hi,

                      I need your server.log for a deeper analysis...

                      CU
                      Thomas

                      • 8. Re: HTTP Cluster with Catalina
                        Thomas Peuss Newbie

                        Hi!

                        I need your server.log to analyze your problem...

                        CU
                        Thomas

                        • 9. Re: HTTP Cluster with Catalina
                          Thomas Peuss Newbie

                          Hi!

                          I need your server.log to analyze your problem...

                          CU
                          Thomas

                          • 10. Re: HTTP Cluster with Catalina
                            Jorju Newbie

                            Hi,

                            Thanks very much for tour interest
                            (and excuse me for my delay)

                            I still have to try it with the new sources
                            http://www.jboss.org/modules/bb/index.html?module=bb&op=viewtopic&t=forums/ again

                            • 11. Re: HTTP Cluster with Catalina
                              Thomas Peuss Newbie

                              Hello!

                              You should use a "fresh" catalina-build. It seems that you have NO -tag in your web.xml. There is no webapp that triggers the cluster code...

                              CU
                              Thomas

                              • 12. Re: HTTP Cluster with Catalina
                                Jorju Newbie

                                Seems the new sources solved my problem

                                but ...
                                session failback isn't yet achieved !

                                that means,
                                - load balancing and session afinity seem now to work
                                the right way
                                (i.e. SessionIds Sad06NhOOs91G9qEk+gflw**.server1)
                                - launch the 2 clustered-servers and fill the session of one of them: we'll call this server "server1"
                                (although i have debug="99" in most xml i cannot
                                see any session replication logs :-(
                                - stop server1
                                - try to continue filling your session (using the same
                                sessionId)
                                - yujuuuuu !, session is being replicated
                                (although i still haven't got any logs that confirms it)
                                - now launch again the dead server ("server1")
                                when it finishes launching it should replicate the
                                current session in server2 but...
                                - try to continue filling your session:
                                wops !, a new session ? where did my shopping cart go ?

                                is it session failback already implemented ?

                                Thanks

                                • 13. Re: HTTP Cluster with Catalina
                                  Jorju Newbie

                                  One more thought ...

                                  i was so happy to see that, finally, the session get
                                  replicated that i deleted jvmRoute="worker_as_in_workers.properties_name"
                                  from tomcat4-service.xml to force the lost of
                                  session affinity

                                  i believed that (as session was now replicated) session
                                  affinity was useless (without taking into accout performance boost) from a theoric point of view.

                                  but, i was very disappointed to see that losing session
                                  affinity also causes to loose session replication :-(

                                  so, my final situation is:
                                  session affinity + HTTP in-memory session replication + without session failback ! :-(

                                  is there such a way to improve this situation ?

                                  • 14. Re: HTTP Cluster with Catalina
                                    Thomas Peuss Newbie

                                    Hello!

                                    OK. This may be a bug. At work we use a hardware loadbalancer and the sessions stays at the LAST machine that answered the request. So if you are on server1 and get a failover to server2 you stay there even when server1 comes back again. I will investigate...

                                    CU
                                    Thomas

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