Round Robin was not happening for my cluster with WebLogic Proxy Plugin

          Hi,
          I configured my cluster with software load balancer, HTTPClusterServlet. By default,
          it is load balancing with Round Robin Algorithm. That means one HTTP request
          goes to server1, and the other HTTP request goes to server2. However, it is not
          what I can see no matter for the requests in one HTTP session or not.
          Say I open two browser, and log into my application with two different users,
          one is "cyang", the other is "xpression". Then the HTTP request (for servlet/jsp)
          from two browsers always go to the same server1, server2 is not invoked at all.
          I did see one time, with only one session (one browser with "xPression" user log
          in), the most requests go to server1, suddenly I am brough into log in page, then
          I noticed that the request for "xPression" moved to server2 although server1 is
          still alive. Therefore, at most, I can say it is "Random", rather than "Round
          Robin".
          What is the real meaning for HTTP servlet/jsp load balancing algorithm? Does
          Round Robin mean request go to each server in turns? Does it have to be different
          session or it can be within one session?

It should be sticky. If not, then bug / config error.
          Peace,
          Cameron Purdy
          Tangosol, Inc.
          http://www.tangosol.com/coherence.jsp
          Tangosol Coherence: Clustered Replicated Cache for Weblogic
          "Carole Yang" <[email protected]> wrote in message
          news:[email protected]...
          >
          > Thanks. Yeh, with two kind of browsers, I do see the request goes to
          different
          > servers.
          >
          > That goes back to the original question. Does "Round Robin" here fall
          into the
          > scope of a HTTP session. However, that is not always true for my tests.
          Sometimes,
          > HTTP request just randomly goes to another server while in the same HTTP
          session.
          > It is not sticky to one particular server during one session.
          >
          >
          >
          > --Carole
          >
          >
          > "Cameron Purdy" <[email protected]> wrote:
          > >Has to be different sessions to go to different machines.
          > >
          > >Best way to test is to run one session in IE and the other in Mozilla
          > >or
          > >Netscape.
          > >
          > >Peace,
          > >
          > >Cameron Purdy
          > >Tangosol, Inc.
          > >http://www.tangosol.com/coherence.jsp
          > >Tangosol Coherence: Clustered Replicated Cache for Weblogic
          > >
          > >
          > >"Carole Yang" <[email protected]> wrote in message
          > >news:[email protected]...
          > >>
          > >> Hi,
          > >>
          > >> I configured my cluster with software load balancer,
          HTTPClusterServlet.
          > >By default,
          > >> it is load balancing with Round Robin Algorithm. That means one HTTP
          > >request
          > >> goes to server1, and the other HTTP request goes to server2. However,
          > >it
          > >is not
          > >> what I can see no matter for the requests in one HTTP session or not.
          > >>
          > >> Say I open two browser, and log into my application with two different
          > >users,
          > >> one is "cyang", the other is "xpression". Then the HTTP request (for
          > >servlet/jsp)
          > >> from two browsers always go to the same server1, server2 is not invoked
          > >at
          > >all.
          > >>
          > >> I did see one time, with only one session (one browser with "xPression"
          > >user log
          > >> in), the most requests go to server1, suddenly I am brough into log
          > >in
          > >page, then
          > >> I noticed that the request for "xPression" moved to server2 although
          > >server1 is
          > >> still alive. Therefore, at most, I can say it is "Random", rather
          > >than
          > >"Round
          > >> Robin".
          > >>
          > >> What is the real meaning for HTTP servlet/jsp load balancing algorithm?
          > >Does
          > >> Round Robin mean request go to each server in turns? Does it have
          > >to be
          > >different
          > >> session or it can be within one session?
          > >
          > >
          >

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