JNDI Lookup for multiple server instances with multiple cluster nodes

Question

Hi Experts,
I need help with retreiving log files for multiple server instances with multiple cluster nodes. The system is Netweaver 7.01.
There are 3 server instances all instances with 3 cluster nodes.
There are EJB session beans deployed on them to retreive the log information for each server node.
In the session bean there is a method:
public List getServers() {
  List servers = new ArrayList();
  ClassLoader saveLoader = Thread.currentThread().getContextClassLoader();
  try {
   Properties prop = new Properties();
   prop.setProperty(Context.INITIAL_CONTEXT_FACTORY, "com.sap.engine.services.jndi.InitialContextFactoryImpl");
   prop.put(Context.SECURITY_AUTHENTICATION, "none");
   Thread.currentThread().setContextClassLoader((com.sap.engine.services.adminadapter.interfaces.RemoteAdminInterface.class).getClassLoader());
   InitialContext mInitialContext = new InitialContext(prop);
   RemoteAdminInterface rai = (RemoteAdminInterface) mInitialContext.lookup("adminadapter");
   ClusterAdministrator cadm = rai.getClusterAdministrator();
   ConvenienceEngineAdministrator cea = rai.getConvenienceEngineAdministrator();
   int nodeId[] = cea.getClusterNodeIds();
   int dispatcherId = 0;
   String dispatcherIP = null;
   String p4Port = null;
   for (int i = 0; i < nodeId.length; i++) {
    if (cea.getClusterNodeType(nodeId[i]) != 1)
     continue;
    Properties dispatcherProp = cadm.getNodeInfo(nodeId[i]);
    dispatcherIP = dispatcherProp.getProperty("Host", "localhost");
    p4Port = cea.getServiceProperty(nodeId[i], "p4", "port");
    String[] loc = new String[3];
    loc[0] = dispatcherIP;
    loc[1] = p4Port;
    loc[2] = null;
    servers.add(loc);
   mInitialContext.close();
  } catch (NamingException e) {
  } catch (RemoteException e) {
  } finally {
   Thread.currentThread().setContextClassLoader(saveLoader);
  return servers;
and the retreived server information used here in another class:
public void run() {
  ReadLogsSession readLogsSession;
  int total = servers.size();
  for (Iterator iter = servers.iterator(); iter.hasNext();) {
   if (keepAlive) {
    try {
     Thread.sleep(500);
    } catch (InterruptedException e) {
     status = status + e.getMessage();
     System.err.println("LogReader Thread Exception" + e.toString());
     e.printStackTrace();
    String[] serverLocs = (String[]) iter.next();
    searchFilter.setDetails("[" + serverLocs[1] + "]");
    Properties prop = new Properties();
    prop.put(Context.INITIAL_CONTEXT_FACTORY, "com.sap.engine.services.jndi.InitialContextFactoryImpl");
    prop.put(Context.PROVIDER_URL, serverLocs[0] + ":" + serverLocs[1]);
    System.err.println("LogReader run [" + serverLocs[0] + ":" + serverLocs[1] + "]");
    status = " Reading :[" + serverLocs[0] + ":" + serverLocs[1] + "] servers :[" + currentIndex + "/" + total + " ] ";
    prop.put("force_remote", "true");
    prop.put(Context.SECURITY_AUTHENTICATION, "none");
    try {
     Context ctx = new InitialContext(prop);
     Object ob = ctx.lookup("com.xom.sia.ReadLogsSession");
     ReadLogsSessionHome readLogsSessionHome = (ReadLogsSessionHome) PortableRemoteObject.narrow(ob, ReadLogsSessionHome.class);
     status = status + "Found ReadLogsSessionHome ["+readLogsSessionHome+"]";
     readLogsSession = readLogsSessionHome.create();
     if(readLogsSession!=null){
      status = status + " Created  ["+readLogsSession+"]";
      List l = readLogsSession.getAuditLogs(searchFilter);
      serverLocs[2] = String.valueOf(l.size());
      status = status + serverLocs[2];
      allRecords.addAll(l);
     }else{
      status = status + " unable to create  readLogsSession ";
     ctx.close();
    } catch (NamingException e) {
     status = status + e.getMessage();
     System.err.println(e.getMessage());
     e.printStackTrace();
    } catch (CreateException e) {
     status = status + e.getMessage();
     System.err.println(e.getMessage());
     e.printStackTrace();
    } catch (IOException e) {
     status = status + e.getMessage();
     System.err.println(e.getMessage());
     e.printStackTrace();
    } catch (Exception e) {
     status = status + e.getMessage();
     System.err.println(e.getMessage());
     e.printStackTrace();
   currentIndex++;
  jobComplete = true;
The application is working for multiple server instances with a single cluster node but not working for multiple cusltered environment.
Anybody knows what should be changed to handle more cluster nodes?
Thanks,
Gergely

Answer 1

Thanks for the response.
I was afraid that it would be something like that although
was hoping for
something closer to the application pools we use with IIS to
isolate sites
and limit the impact one badly behaving one can have on
another.
mmr
"Ian Skinner" <[email protected]> wrote in message
news:fe5u5v$pue$[email protected]..
> Run CF with one instance. Look at your processes and see
how much memory
> the "JRun" process is using, multiply this by number of
other CF
> instances.
>
> You are most likely going to end up on implementing a
"handful" of
> instances versus "dozens" of instance on all but the
beefiest of servers.
>
> This can be affected by how much memory each instance
uses. An
> application that puts major amounts of data into
persistent scopes such as
> application and|or session will have a larger foot print
then a leaner
> application that does not put much data into memory
and|or leave it there
> for a very long time.
>
> I know the first time we made use of CF in it's
multi-home flavor, we went
> a bit overboard and created way too many. After nearly
bringing a
> moderate server to its knees, we consolidated until we
had three or four
> or so IIRC. A couple dedicated to to each of our largest
and most
> critical applications and a couple general instances
that ran many smaller
> applications each.
>
>
>
>
>