Sql loader hangs

Question

Hi All,
I have a java program which runs sql loader in a timer. That is the sql loader is used to load some tables with the data contained in a flat file. And I want this to be run every night.
I am using Runtime class to initiate a process which will invoke the sql loader. This works fine when I directly call my function in main.
But since I want this to run every night, I decided to invoke it thru the timer class. And when I do that the sql loader hangs and I have to terminate the process manually.
Is there any solution for the above problem?
Any help will be appreciated.
Regards,
Chitra

Answer 1

Just to give a lil bit more added clarity on the issue.
The requirement is like this. I have a flat file which needs to be uploaded to a database periodically. Every 24hrs. Now I am using Oracles SQL Loader to upload the data flat file. I am calling SQL loader from with a java program using Runtime class. Now I initiated this using a standard Java application and put it in the main class. It works fine. Now since I needed to have this running every 24hrs I used a Timer class to set the timer and to have it running evry 24 hrs. Now if I execute the same class above within the timer class, the SQL loader pops up in a new window and the program does not complete the execution. It just hangs. Which requires for me to terminate the process manually. All the data in the flat file is uploaded to the database but that is shown only after the proecess is treminated. Is there any solution for this ? Or does anyone have any idea as to why this is happenin ?
heres the code that I have written.
public class RmsDataLoader
Toolkit toolkit;
Timer timer;
public RmsDataLoader()
toolkit = Toolkit.getDefaultToolkit();
timer = new Timer();
timer.schedule(new RMSJobThread(),
     0, //initial delay
     24*60*60*1000); //subsequent rate
public static void main(String[] args)
RmsDataLoader rms = new RmsDataLoader();
class RMSJobThread extends TimerTask
public RMSJobThread()
public void run()
RMSJob rmsjob = new RMSJob();
rmsjob.runJob();
and the function in runJob is
public void runJob (String errorlog) {
try {
// Validation 1 : The datafile exists and the file size is not 0
String strDataFile = "W:\\rms_amps\\" + todayDate + "\\inv_company_label.dat";
File dataFile = new File(strDataFile);
if(!dataFile.exists()){
rmsExp.createLog(filename, filename, " Data File does not exist", todayDate);
} else {
long len = dataFile.length();
if (len <= 0) {
rmsExp.createLog(filename, filename, " File size is 0 ", todayDate);
// End of Validation 1
// create a process to invoke sql loader
Process process = Runtime.getRuntime().exec("sqlldr USERID=scott@umidb/tiger CONTROL=load_company_label.ctl LOG=load_company_label.log BAD=inv_company_label.bad DATA=inv_company_label.dat");
return ;
} catch (Exception ei) {
rmsExp.createLog(filename, filename, ei.getMessage() , todayDate);
ei.printStackTrace();
System.out.println (" Error while initiating the data loading " );
return ;