App Server crashes - need help

Question

We have the problem that our App Server crashes under different conditions. Our application is a Web App with many Session and Entity EJBs. We using Oracle 8.1.6 as DB.
The following code Fragment causes the Error:
// Parameter colProjects is an Collection of Strings with primary keys
public java.util.Collection getResult(java.util.Collection colProjects) {
java.util.Vector result = new Vector();
try{
LocalProjectHome home; // Home Interface of an Entity Bean
ServiceLocator sl = new ServiceLocator(); // Service Locator Pattern; not implemented as Singleton, no Caching!
home = (LocalProjectHome)sl.getLocalHome(JNDIName.Bean.Project);
// and iterate through the result project-id's
LocalProject p;
java.util.Iterator itProjects = colProjects.iterator();
while( itProjects.hasNext()){
p = home.findByPrimaryKey( (String)itProjects.next() );
          // Read Information from p and write it to vektor result
catch(Exception e){
          // Error Logging Functions here
return result;
This funktion works fine until the number of entity beans exceeds a size over 400. if we reach a higher number of beans the Server crashes without any exception most of the time. Sometimes we got an Exeption like "OraclePrepareStmt - class not found Exception".
This Crash occurs only when we start the App Server Instance in Release Mode. When we start int in debug mode it works fine. We can reproduce this behavior on Solaris and Windows Versions of the App Server.
Any ideas where we can look to solve this problem? Or if you need more information about our configuration, plz post here.

Answer 1

Hi again,
If you're using the function GUI_DOWNLOAD because its on the presentation layer, then use the function as follows to create it tab delimited. Notice the bold parameter
    CALL FUNCTION 'GUI_DOWNLOAD'
         EXPORTING
              filename                = file
              has_field_separator     = 'X'  "file is TAB delimited
         TABLES
              data_tab                = itab_result
         EXCEPTIONS
              file_open_error         = 1
              file_read_error         = 2
              no_batch                = 3
              gui_refuse_filetransfer = 4
              invalid_type            = 5
              no_authority            = 6
              unknown_error           = 7
              bad_data_format         = 8
              header_not_allowed      = 9
              separator_not_allowed   = 10
              header_too_long         = 11
              unknown_dp_error        = 12
              access_denied           = 13
              dp_out_of_memory        = 14
              disk_full               = 15
              dp_timeout              = 16
              OTHERS                  = 17.
Hope it helps.
Regards,
Gilberto Li