Problems with WebLogic in-memory replication

Question

We are using Netscape Server 4.0 with the WebLogic 4.51sp7 proxy connecting
          to 2 clustered machines. We'd like to use the in-memory replication, but
          whenever we set up our weblogic.properties file like the description in the
          "Setting up a WebLogic Cluster" document, we get an error. The following
          are the settings we are setting:
          weblogic.httpd.clustering.enable=true
          weblogic.httpd.session.persistence=true
          webloigc.httpd.session.persistentStoreType=replicated
          We get the error when we try to start up any of the servers in the cluster.
          The following is the error:
          Unable to initialize server: java.lang.NullPointerException
          fatal initialization exception
          java.lang.NullPointerException
          at weblogic.t3.srvr.HttpServer.start(Compiled Code)
          at weblogic.t3.srvr.T3Srvr.start(Compiled Code)
          at weblogic.t3.srvr.T3Srvr.main(Compiled Code)
          at weblogic.Server.startServerDynamically(Compiled Code)
          at weblogic.Server.main(Compiled Code)
          Any information anyone has out there would be greatly appreciated!
          

Answer 1

Actually, it is just the weblogic.httpd.clustering.enable=true that causes
          problems. When I remove it, it starts up just fine, but I don't think it is
          using the in-memory replication. It is throwing the exception near the end
          of the start up procedure, just after loading the EJBs. Lately, it hasn't
          even been throwing the exception, it just hangs. The last lines we see are:
          74 EJBs were deployed using .ser files.
          0 EJBs were deployed using .jar files
          It is at this point that it either throws the exception or hangs. We do
          have clustering licenses for all the machines in the cluster. We are using
          the default multicastAddress (237.0.0.1) so I was not explicitly setting it.
          Now, I am and it doesn't seem to make any difference.
          Any ideas?
          John
          "Mike Benham" <[email protected]> wrote in message
          news:[email protected]...
          >
          > So just setting those listed properties causes an NPE? If you remove
          > just those properties, you don't get an NPE? At what point in the
          > startup procedure is that exception thrown? Although it shouldn't
          > result in that error, are you sure that you have a clustering license?
          > You also need to set the multicast address to use for your cluster:
          > weblogic.cluster.multicastAddress=IP.
          >
          > - Mike
          >
          >
          > John Peters wrote:
          > >
          > > We are using Netscape Server 4.0 with the WebLogic 4.51sp7 proxy
          connecting
          > > to 2 clustered machines. We'd like to use the in-memory replication,
          but
          > > whenever we set up our weblogic.properties file like the description in
          the
          > > "Setting up a WebLogic Cluster" document, we get an error. The
          following
          > > are the settings we are setting:
          > >
          > > weblogic.httpd.clustering.enable=true
          > > weblogic.httpd.session.persistence=true
          > > webloigc.httpd.session.persistentStoreType=replicated
          > >
          > > We get the error when we try to start up any of the servers in the
          cluster.
          > > The following is the error:
          > >
          > > Unable to initialize server: java.lang.NullPointerException
          > > fatal initialization exception
          > > java.lang.NullPointerException
          > > at weblogic.t3.srvr.HttpServer.start(Compiled Code)
          > > at weblogic.t3.srvr.T3Srvr.start(Compiled Code)
          > > at weblogic.t3.srvr.T3Srvr.main(Compiled Code)
          > > at weblogic.Server.startServerDynamically(Compiled Code)
          > > at weblogic.Server.main(Compiled Code)
          > >
          > > Any information anyone has out there would be greatly appreciated!