Java mail agent thowing exception

Hi,

I have a problem with a mail agent written in java. It is used for sending mails for pending items.  The agent is scheduled for every 15 minutes. The number of  pending records are between 50-120 per day.  The code was working fine in the production server for 3 months. But one month back it started throwing "lotus.domino.notes exception" and the application hangs every two days. From the log I couldn't get more details of the error.

My code is pasted below, where've I gone wrong? Could anyone help me.?

Thanks in advance


Joj





import lotus.domino.*;

public class JavaAgent extends AgentBase {

      public void NotesMain() {

            try {
                  Session vNotesSession = getSession();
                  AgentContext vNotesAgentContext = vNotesSession.getAgentContext();

                  Document vNotesDocument;
                      DateTime now = null;
                  boolean bSent = false;
                  String sErrorMessage = "";
                  now = vNotesSession.createDateTime("today");
                  now.setNow();
                  Database vNotesDatabase = vNotesAgentContext.getCurrentDatabase();
                  View vNotesView = vNotesDatabase.getView( "ScheduleMailForPending" );
                  View vSettingsView = vNotesDatabase.getView("AppSetting");
                  sleep(1000);
                  vSettingsView.refresh();
                  vNotesView.refresh();
                  
                  Document vSettingDoc = vSettingsView.getFirstDocument();
                  
                  String sSupervisor = null;
                  int sPendingHrs = 0;
                  int sUnattendHr = 0;
                  boolean stopMail = false ;
      
                  String     status = null;
                  String statusFlag = null;
            
                  if (vSettingDoc != null) {
                          sSupervisor = vSettingDoc.getItemValueString("SetupSupervisor");
                          String sUnattendHrs = vSettingDoc.getItemValueString("SetupUnattended");
                          String sPendingHr = vSettingDoc.getItemValueString("SetupPending");
                        if (sPendingHr != null)
                              sPendingHrs = Integer.parseInt(sPendingHr.trim());
                          String stopM = vSettingDoc.getItemValueString("SetupStopMail");
                         boolean sm   =  (stopM != null && stopM.equals("false") );
            
                          if (sm && sPendingHrs != 0 && sSupervisor != null)
                            stopMail = true;
                  } else {
                        stopMail = false;
                  }
                  //loop through all the documents in the All view and mail them and then remove them
                  vNotesDocument = vNotesView.getFirstDocument();
                  Item tempItem = null;
                  int noOfHours = 0;
                  DateTime tempDate = null;
                   String ticketNo = null;
                  int counter = 1;

                  while ( stopMail && vNotesDocument != null) {
                          status = vNotesDocument.getItemValueString("Status");
                          ticketNo = vNotesDocument.getItemValueString("LogCallTicketNo");
                          Document vDominoDocument = null;
                      try {                            
                              tempItem = vNotesDocument.getFirstItem("AttendDate");
                              tempDate = tempItem.getDateTimeValue();
                              noOfHours = now.timeDifference(tempDate);
                              if (noOfHours > 0 && (noOfHours/3600) >= sPendingHrs) {
                                      vDominoDocument = vNotesDatabase.createDocument();
                                      vDominoDocument.replaceItemValue("Subject", "HelpDesk Application : Pending Calls");
                                      vDominoDocument.replaceItemValue("Body", "This mail has been originated by Helpdesk Application. Call is pending for more than " + sPendingHrs + " Hours \n Ticket Numer is " + ticketNo);
                                      vDominoDocument.send(false, sSupervisor);
                                      bSent = true;
                              } else {
                                      bSent = false;
                              }
                      } catch (Exception ex) {
                              bSent = false;
                              System.out.println("Exception " + ex.getMessage());
                      } finally {
                              //Complete fields on the mail document.
                              if ( bSent ) {
                                      vNotesDocument.replaceItemValue("StatusFlag", "Escalated");
                                      vNotesDocument.replaceItemValue("EscalatedStatus", "None");
                                      vNotesDocument.replaceItemValue("MessageStatus", now  + " : Message Sent Ok!");
                                      vNotesDocument.save ( true, false, false );
                              }
                      } //try inside while loop                          
                          ++counter;
                      vNotesDocument = vNotesView.getNthDocument( counter );
                  } //while loop
            } catch(Exception e) {
                  e.printStackTrace();
            }
      }
}