Creating Oracle Application Server Environment?

Hi All,
i am new to AS
i need to know the way that i should build my Application server environment
suppose i am a company that sells a software package, i have 2 clients for this package
so i should install
1 infrastructure (for both clients)
1 middle tear (for both clients)
2 application servers ( 1 each)
please help as i asked a lot of questions before and no one reply me, it seems that this forum is not very active like the DB Admin one
Thanks for any contribution

If you are actively supporting 2 clients, but the codestream for each is the same then you really only need one AS... just use 2 databases and access the relevant one depending on your url parameters.
You could create seperate AS but sounds like overkill to me.

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         at java.lang.Thread.run(Thread.java:613)
    Caused by: java.lang.InstantiationException: Error communicating with server: Connection refused; nested exception is:
         javax.naming.CommunicationException: Connection refused [Root exception is java.net.ConnectException: Connection refused]
         at com.oracle.naming.J2EEContext.create(J2EEContext.java:104)
         at oracle.j2ee.naming.ApplicationClientInitialContextFactory.getApplicationContext(ApplicationClientInitialContextFactory.java:124)
         ... 20 more
    Caused by: oracle.oc4j.rmi.OracleRemoteException: Connection refused; nested exception is:
         javax.naming.CommunicationException: Connection refused [Root exception is java.net.ConnectException: Connection refused]
         at oracle.oc4j.deployment.ApplicationClientResourceFinder.lookupResourceFinder(ApplicationClientResourceFinder.java:110)
         at oracle.oc4j.deployment.ApplicationClientResourceFinder.getFinder(ApplicationClientResourceFinder.java:123)
         at oracle.oc4j.deployment.ApplicationClientResourceFinder.getLocation(ApplicationClientResourceFinder.java:75)
         at oracle.oc4j.deployment.ApplicationClientResourceFinder.getEjbBinding(ApplicationClientResourceFinder.java:38)
         at com.oracle.naming.J2EEContext.addEJBReferenceEntries(J2EEContext.java:515)
         at com.oracle.naming.J2EEContext.create(J2EEContext.java:97)
         ... 21 more
    Caused by: javax.naming.CommunicationException: Connection refused [Root exception is java.net.ConnectException: Connection refused]
         at com.evermind.server.rmi.RMIClient.lookup(RMIClient.java:292)
         at com.evermind.server.rmi.RMIClientContext.lookup(RMIClientContext.java:51)
         at oracle.oc4j.deployment.ApplicationClientResourceFinder.lookupResourceFinder(ApplicationClientResourceFinder.java:101)
         ... 26 more
    Caused by: java.net.ConnectException: Connection refused
         at java.net.PlainSocketImpl.socketConnect(Native Method)
         at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
         at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
         at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
         at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:428)
         at java.net.Socket.connect(Socket.java:507)
         at java.net.Socket.connect(Socket.java:457)
         at java.net.Socket.<init>(Socket.java:365)
         at java.net.Socket.<init>(Socket.java:207)
         at com.evermind.server.rmi.RMIClientConnection.createSocket(RMIClientConnection.java:682)
         at oracle.oc4j.rmi.ClientSocketRmiTransport.createNetworkConnection(ClientSocketRmiTransport.java:58)
         at oracle.oc4j.rmi.ClientRmiTransport.connectToServer(ClientRmiTransport.java:78)
         at oracle.oc4j.rmi.ClientSocketRmiTransport.connectToServer(ClientSocketRmiTransport.java:68)
         at com.evermind.server.rmi.RMIClientConnection.connect(RMIClientConnection.java:646)
         at com.evermind.server.rmi.RMIClientConnection.sendLookupRequest(RMIClientConnection.java:190)
         at com.evermind.server.rmi.RMIClientConnection.lookup(RMIClientConnection.java:174)
         at com.evermind.server.rmi.RMIClient.lookup(RMIClient.java:283)
         ... 28 more
    ---- Embedded exception
    java.lang.InstantiationException: Error communicating with server: Connection refused; nested exception is:
         javax.naming.CommunicationException: Connection refused [Root exception is java.net.ConnectException: Connection refused]
         at com.oracle.naming.J2EEContext.create(J2EEContext.java:104)
         at oracle.j2ee.naming.ApplicationClientInitialContextFactory.getApplicationContext(ApplicationClientInitialContextFactory.java:124)
         at oracle.j2ee.naming.ApplicationClientInitialContextFactory.getInitialContext(ApplicationClientInitialContextFactory.java:117)
         at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:667)
         at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:247)
         at javax.naming.InitialContext.init(InitialContext.java:223)
         at javax.naming.InitialContext.<init>(InitialContext.java:197)
         at oracle.oc4j.admin.jmx.client.CoreRemoteMBeanServer.fetchMBeanServerEjbRemote(CoreRemoteMBeanServer.java:468)
         at oracle.oc4j.admin.jmx.client.CoreRemoteMBeanServer.<init>(CoreRemoteMBeanServer.java:161)
         at oracle.oc4j.admin.jmx.client.RemoteMBeanServer.<init>(RemoteMBeanServer.java:128)
         at oracle.oc4j.admin.jmx.client.RemoteMBeanServer.getMBeanServer(RemoteMBeanServer.java:158)
         at oracle.oc4j.admin.jmx.client.ClientMBeanServerProxyFactory.getMBeanServer(ClientMBeanServerProxyFactory.java:68)
         at oracle.oc4j.admin.jmx.remote.rmi.RMIJMXConnectorImpl.getConnector(RMIJMXConnectorImpl.java:190)
         at oracle.oc4j.admin.jmx.remote.JMXConnectorImpl.connect(JMXConnectorImpl.java:400)
         at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:248)
         at oracle.jdevimpl.cm.dt.J2EEConnectionWrapper._getJMXConnector(J2EEConnectionWrapper.java:269)
         at oracle.jdevimpl.cm.dt.J2EEConnectionWrapper.getPresentation(J2EEConnectionWrapper.java:76)
         at oracle.jdevimpl.cm.dt.browser.j2ee.J2EEBrowser.openConnectionBrowser(J2EEBrowser.java:75)
         at oracle.jdeveloper.cm.dt.ConnectionNode$NodeOpen.doWork(ConnectionNode.java:423)
         at oracle.ide.dialogs.ProgressRunnable.run(ProgressRunnable.java:159)
         at oracle.ide.dialogs.ProgressBar.run(ProgressBar.java:551)
         at java.lang.Thread.run(Thread.java:613)
    Caused by: oracle.oc4j.rmi.OracleRemoteException: Connection refused; nested exception is:
         javax.naming.CommunicationException: Connection refused [Root exception is java.net.ConnectException: Connection refused]
         at oracle.oc4j.deployment.ApplicationClientResourceFinder.lookupResourceFinder(ApplicationClientResourceFinder.java:110)
         at oracle.oc4j.deployment.ApplicationClientResourceFinder.getFinder(ApplicationClientResourceFinder.java:123)
         at oracle.oc4j.deployment.ApplicationClientResourceFinder.getLocation(ApplicationClientResourceFinder.java:75)
         at oracle.oc4j.deployment.ApplicationClientResourceFinder.getEjbBinding(ApplicationClientResourceFinder.java:38)
         at com.oracle.naming.J2EEContext.addEJBReferenceEntries(J2EEContext.java:515)
         at com.oracle.naming.J2EEContext.create(J2EEContext.java:97)
         ... 21 more
    Caused by: javax.naming.CommunicationException: Connection refused [Root exception is java.net.ConnectException: Connection refused]
         at com.evermind.server.rmi.RMIClient.lookup(RMIClient.java:292)
         at com.evermind.server.rmi.RMIClientContext.lookup(RMIClientContext.java:51)
         at oracle.oc4j.deployment.ApplicationClientResourceFinder.lookupResourceFinder(ApplicationClientResourceFinder.java:101)
         ... 26 more
    Caused by: java.net.ConnectException: Connection refused
         at java.net.PlainSocketImpl.socketConnect(Native Method)
         at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
         at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
         at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
         at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:428)
         at java.net.Socket.connect(Socket.java:507)
         at java.net.Socket.connect(Socket.java:457)
         at java.net.Socket.<init>(Socket.java:365)
         at java.net.Socket.<init>(Socket.java:207)
         at com.evermind.server.rmi.RMIClientConnection.createSocket(RMIClientConnection.java:682)
         at oracle.oc4j.rmi.ClientSocketRmiTransport.createNetworkConnection(ClientSocketRmiTransport.java:58)
         at oracle.oc4j.rmi.ClientRmiTransport.connectToServer(ClientRmiTransport.java:78)
         at oracle.oc4j.rmi.ClientSocketRmiTransport.connectToServer(ClientSocketRmiTransport.java:68)
         at com.evermind.server.rmi.RMIClientConnection.connect(RMIClientConnection.java:646)
         at com.evermind.server.rmi.RMIClientConnection.sendLookupRequest(RMIClientConnection.java:190)
         at com.evermind.server.rmi.RMIClientConnection.lookup(RMIClientConnection.java:174)
         at com.evermind.server.rmi.RMIClient.lookup(RMIClient.java:283)
         ... 28 more

    Caused by: java.net.ConnectException: Connection refused
    Is the Oracle application server running?

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