Losing session with WLS 7.02 in cluster env

Question

          PROBLEM: We are losing our session when running in our app in a clustered environment.
          The user can use the app for a while, but then weird stuff starts happening. In
          some cases, the login check that we do at the begining of each request fails,
          because it tries to check for a login token in the session, and the session has
          been wiped out. The user gets forwarded to the login page.
          Our configuration is:
          WLS 7.0.2 (OS = Windows 2000)
          Admin Server and a managed server A at APP1 (physical machine), another managed
          server B
          at APP2 (physical machine), A and B is in one cluster. We had 6 Apache Servers
          2.0.45 (OS = Linux) and each works together with Weblogic Plugin. The weblogic
          plugin has the following configuration:
          <Location /sample>
          SetHandler weblogic-handler
          WeblogicCluster 10.1.1.11:7010,10.1.1.12:7010
          Idempotent ON
          CookieName JSESSIONID
          </Location>
          The server A and B use round-robin loadblancing, and we have a hardware loadblancer
          infront of Apache to do loadblancing for our 6 web servers.
          In weblogic.xml we config our application to use replicated for session failover.
          Losing session is randomly happened.
          Anyone of you have any idea?
          Thanks in advance.
          Harry
          

Answer 1

To verify that it is WL and not your app logic, try using a different
          session replication implementation for testing, such as the one that comes
          with Coherence for Servlet 2.3 containers:
          http://www.tangosol.com/coherence.jsp
          Peace,
          Cameron Purdy
          Tangosol, Inc.
          http://www.tangosol.com/coherence.jsp
          Tangosol Coherence: Clustered Replicated Cache for Weblogic
          "Harry Yu" <[email protected]> wrote in message
          news:[email protected]...
          >
          > PROBLEM: We are losing our session when running in our app in a clustered
          environment.
          > The user can use the app for a while, but then weird stuff starts
          happening. In
          > some cases, the login check that we do at the begining of each request
          fails,
          > because it tries to check for a login token in the session, and the
          session has
          > been wiped out. The user gets forwarded to the login page.
          >
          > Our configuration is:
          > WLS 7.0.2 (OS = Windows 2000)
          > Admin Server and a managed server A at APP1 (physical machine), another
          managed
          > server B
          > at APP2 (physical machine), A and B is in one cluster. We had 6 Apache
          Servers
          > 2.0.45 (OS = Linux) and each works together with Weblogic Plugin. The
          weblogic
          > plugin has the following configuration:
          > <Location /sample>
          > SetHandler weblogic-handler
          > WeblogicCluster 10.1.1.11:7010,10.1.1.12:7010
          > Idempotent ON
          > CookieName JSESSIONID
          > </Location>
          >
          > The server A and B use round-robin loadblancing, and we have a hardware
          loadblancer
          > infront of Apache to do loadblancing for our 6 web servers.
          >
          > In weblogic.xml we config our application to use replicated for session
          failover.
          >
          > Losing session is randomly happened.
          >
          > Anyone of you have any idea?
          >
          > Thanks in advance.
          >
          > Harry
          >