IE5 and Netscape with WLS 5.1

Hi,
I sent this out a couple of weeks ago. I have tried the solution but with no success could some one please help...
We are using Weblogic 5.1 Service Pack 8 on Solaris 2.6, with Apache server acting as a bridge. Apache actually does not serve any content and just forwards ALL requests to WLS. We have a problem at the moment that if you use internet explorer with WLS then it is extremely slow serving up pages. Weblogic listens on port 7001. If we use Netscape to connect then it runs with no slow downs at all, about three second to serve a page but if we use IE it takes nearly a minute. This delay occurs when the request goes through apache. If we directly access WLS on port 7001 then there is no such delay.
Any ideas on what could cause that delay? Is it an Apache bridge problem or a WLS one?
Cheers,
Barnaby
[att1.html]

You can have it but not for fail-safe configuration.
It is not possible to have clusters with different
WLS versions especially between 5.1 & 8.1
Kumar
Alexander von Alkier wrote:
hi all,
we are planning to upgrade our application running on WLS 5.1 to WLS 8.1. We
have configuraed a WLS 5.1 cluster with 4 servers joining this cluster. What
I'm now thinking of is: is it possible to run a WLS cluster that has 2
Servers running on WLS 5.1 and another 2 servers running on WLS 8.1?
Reason of thinking so, is that want to have the most failsafe configration
as possible during our upgrade.
I searched the BEA docs, but didn't find anything.
any help would be fine.
thanks
Alexander

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    Connection to the DAO not only stores it as a member at some point (which is not
    a good idea anyway) but is also a singleton - then, of course, it's no surprise
    that the Connection gets invalid in a incalculable way when concurrent threads
    share it.
    The singleton instantiation was not so obvious because the way of instantiation
    is controlled by a configuration parameter that can be overridden at different
    levels.
    I changed it and the productive logfiles indicate that the SQLExceptions related
    to that class have disappeared.I am happy to have helped.
    So, thanks a lot for the advice.
    But I am still wondering why this code has worked for so long a time with WLS
    5.1 and Oracle 8 (the system has been productive for over 2 years). Even in the
    approval tests with WLS 7.0 and Oracle 9, we did not run into problems, although
    it was multi-user environment.Mo idea.
    I still believe that there is a difference between WLS 5.1 and 7.0 in the way
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    a little more explicit about those changes and possible version incompatabilities
    beyond the general advice "use the latest thin driver".Though I can think of no change to our pooling which would have had any material
    effect in this case, I will certainly do what I can to see that our documentation
    is explicit about changes.
    Joe
    Best regards, Andreas
    Joe Weinstein <[email protected]> wrote:
    Hi Andreas.
    Andreas Zehrt wrote:
    Hi,
    We are using WLS 7.0 SP4, and Oracle 9 and the Oracle thin driver type4. In our
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    the pool is not valid any more when the application tries to use it.
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    or closed.
    - Connection has already been closedAs described. If you give a stacktrace, we could make a debug patch which
    would show
    where it was originally closed.
    - Closed Statementsame as above.
    - Transaction is no longer active - status committingThat implies your code is obtaining a connection from a transactional
    datasource,
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    with,
    is finished.
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    closed immediately after use. As an example, I attached a code snippetand a resulting
    StackTrace which.
    The problem also seems to occur only with an (unknown) minimum of concurrentusern,
    since in the approval tests on an almost identical test system theseerrors never
    occurred.
    I also followed the advice from Oracle and installed the latest OracleJDBC driver
    (Oracle 10g) - to no avail.
    What else can I do?
    Another question: Is it correct that my Oracle JDBC driver is in theapplication
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    front of the -classpath argument that the startWebLogic script createsfor the
    java line that starts the server".
    I hesitate to do so, since the driver is in a standard WebApp- directory,WEB-INF/lib.
    Is it possible and safe to add a jar located there to the system classpath?If
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    We also ship
    an oracle thin driver, which becomes obsolete soon...
    I am concerned that your code creates pool connections to be used later.
    The problems
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    the connection
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    threads can
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    never gets closed,
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    Joe
    The Connection parameter is opened by a business component class, ComaServiceProviderClassicImpl.It is propagated through
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    public class ConcernDAOImpl extends BaseDAO {
         public Collection getConcernsForIncidents(Connection conn, Collectionincidents)
    throws DataAccessException, ConstraintException, ComaParseException{>
    sqlMessage.append(")");
    String sqlStmt = sqlMessage.toString();
    PreparedStatement pstmt = null;
    ResultSet rs = null;
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    pstmt = conn.prepareStatement(sqlStmt);
    rs = pstmt.executeQuery();
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    concern.setIncidentOID(DAOUtil.getComaOID(rs, ComaDBNames.KDAVGENR));
    return concerns;
    } catch (SQLException sqle) {
    // Wrapps real SQL exception
    String[] message = new String[]{sqle.getMessage(), sqlStmt};
    throw new DataAccessException(ExpCode.S_ORACLE_SQL, message,
    sqle);
    } finally {
    closeAll(rs, pstmt);
    _logger.exitDebug(method);
    Here, the Connection is acquired and finally closed
    public class ComaServiceProviderClassicImpl {
         public void updateComplaint(
    final Request updateRequest,
    final ResponseSingleElement response,
    final Principal principal)
    throws SystemException {
    try {
    logger.info("updateComplaint", "store incident");
    // store the incident in the database
    incidentManager.storeIncident(getConnection(), updateIncident);
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    Incident returnIncident = incidentManager.loadIncident(//IncidentManager passes the Connection to the DAO
    getConnection(), updateIncident.getOID());
    } catch (RemoteException rex) {
    // remote exceptions
    rollbackIfNecessary();
    CoreUtils.unwrapRemoteException(rex, logger);
    } catch (SystemException e) {
    // all other exceptions --> rollback if necessary and rethrow
    rollbackIfNecessary();
    throw e;
    } finally {
    removeConnection();
    logger.exitDebug("updateComplaint");
    This is the resulting StackTrace:
    sql exception: [Closed Statement: next] - sql statement: [select *
         at de.deutschepost.ubbrief.coma.persistence.dao.ConcernDAOImpl.getConcernsForIncidents(ConcernDAOImpl.java:363)
         at de.deutschepost.ubbrief.coma.persistence.dao.CachingConcernDAOImpl.getConcernsForIncidents(CachingConcernDAOImpl.java:129)
         at de.deutschepost.ubbrief.coma.persistence.incidentmanager.IncidentManagerImpl.loadConcernStructuresIntoIncidents(IncidentManagerImpl.java:1067)
         at de.deutschepost.ubbrief.coma.persistence.incidentmanager.IncidentManagerImpl.loadStructureForIncident(IncidentManagerImpl.java:320)
         at de.deutschepost.ubbrief.coma.persistence.incidentmanager.IncidentManagerImpl.loadIncidents(IncidentManagerImpl.java:264)
         at de.deutschepost.ubbrief.coma.persistence.taskmanager.TaskManagerImpl.selectTasksForUser(TaskManagerImpl.java:299)
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         at de.deutschepost.ubbrief.backbone.jazz.impl.backbone.BackboneBean.messageArrived(BackboneBean.java:637)
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         at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:2351)
         at weblogic.jms.client.JMSSession.execute(JMSSession.java:2267)
         at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:234)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:210)
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         at weblogic.jdbc.jts.Driver.getNonTxConnection(Driver.java:373)
         at weblogic.jdbc.jts.Driver.connect(Driver.java:129)
         at weblogic.jdbc.common.internal.RmiDataSource.getConnection(RmiDataSource.java:287)
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         at de.deutschepost.ubbrief.coma.core.ComaComponentImpl.getConnection(ComaComponentImpl.java:99)
         at de.deutschepost.ubbrief.coma.persistence.customermanager.CurryCustomerManagerImpl.findCustomers(CurryCustomerManagerImpl.java:73)
         at de.deutschepost.ubbrief.coma.service.z2.ComaServiceProviderZ2BaseImpl.resolveCustomerInstances(ComaServiceProviderZ2BaseImpl.java:808)
         at de.deutschepost.ubbrief.coma.service.z2.ComaServiceProviderZ2Impl.getTaskList(ComaServiceProviderZ2Impl.java:213)
         at de.deutschepost.ubbrief.coma.service.z2.ComaServiceProviderZ2Bean_1dhrj7_EOImpl.getTaskList(ComaServiceProviderZ2Bean_1dhrj7_EOImpl.java:154)
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         at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:263)
         at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:230)
         at de.deutschepost.ubbrief.coma.sbba.z2.CMPGetTaskList_9b9mv5_EOImpl_WLStub.execute(UnknownSource)
         at de.deutschepost.ubbrief.backbone.jazz.impl.core.RequestHandlerImpl.handleRequest(RequestHandlerImpl.java:115)
         at de.deutschepost.ubbrief.backbone.common.impl.core.rpc.server.ServerKernelImpl.handleTransportMessage(ServerKernelImpl.java:270)
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         at de.deutschepost.ubbrief.backbone.common.impl.core.KernelFacade.handleMessage(KernelFacade.java:209)
         at de.deutschepost.ubbrief.backbone.jazz.impl.backbone.BackboneBean.messageArrived(BackboneBean.java:637)
         at de.deutschepost.ubbrief.backbone.jazz.impl.backbone.BackboneBean_ina9d7_ELOImpl.messageArrived(BackboneBean_ina9d7_ELOImpl.java:105)
         at de.deutschepost.ubbrief.backbone.jazz.impl.transport.receive.LocalQueueReceiveBean.deliverMessage(LocalQueueReceiveBean.java:43)
         at de.deutschepost.ubbrief.backbone.jazz.impl.transport.receive.AbstractMessageReceiveBean.onMessage(AbstractMessageReceiveBean.java:127)
         at weblogic.ejb20.internal.MDListener.execute(MDListener.java:377)
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         at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:234)
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    office: +1 404 327 7238
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    Charu

    It would be nice to see the sources...
    Usually, people don't use PopupMenu for implementing menus in menu bar - they use JMenu for this. Did you try that? Or do you use JMenu and still have problems?

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