Call export with java function stop after a time

Question

Hi
we make a function java for call exp.exe.
We pass at java's function a string
we use this code
/* * ExecuteCmd.java * This is a sample application that uses the Runtime Object * to execute a program. * */
/* Import the classes needed for Runtime, Process, and Exceptions */
import java.lang.*;
//import java.lang.Process;
import java.io.*;
//import java.lang.InterruptedException;
class ExecuteCmd {
public static int Cmd(String args) {
try {
/* Execute the command using the Runtime object and get the
Process which controls this command */
Process p = Runtime.getRuntime().exec(args);
/* Use the following code to wait for the process to finish
and check the return code from the process */
try {
p.waitFor();
/* Handle exceptions for waitFor() */
} catch (InterruptedException intexc) {
//System.out.println("Interrupted Exception on waitFor: " + intexc.getMessage());
     return -1;
return p.exitValue();
/* Handle the exceptions for exec() */
} catch (IOException e) {
// System.out.println("IO Exception from exec : " + e.getMessage());
// e.printStackTrace();
     return 1;
after a time the export begin but stop after some time.
If the schema is little like not table but some sequence the export gone normally but if the schema is big the export stop after a time but we dont have a trace with log.
Can you help

Answer 1

I think you need to gobble up the output from the command you are exec'ing. If the exec'd command fills up your command space buffer it will stop when the buffer is full.
Try adding the lines
String s = new String();
while ((s = p.readLine())!=null)
after the try block to gobble up the output from your command call.