Runtime.Exec() freeze when we specify non-exist directory in arg list.

REPRODUCE:
 1. Compile the below program

===>
import java.io.*;
public class Exec {
    public static void main( String argv[] ) {
        try {
            File path = new File("/export/home/java/nosuchdir");
                           // Specify non-exist dir.
            Process process = Runtime.getRuntime().exec( argv, null, path );

            BufferedReader br = new BufferedReader(
                new InputStreamReader(
                    process.getInputStream() ) );
            String line;
            while( (line = br.readLine()) != null )
                System.out.println( line );

        }
        catch( IndexOutOfBoundsException e ) {
            System.err.println( "Usage:java ExecTest command [args...]" );
            System.exit(-1);
        }
        catch( Exception e ){
            System.err.println( "Error:" + e.toString() );
            System.exit(-1);
        }
    }
}
<===

 2. Launch the "java Exec ls"
    (This command line try to "ls" command under the specified directory)

  Here, no response returns.


Note:
  - When the non-exist directory is specified, an exception should be thrown
    freeze should not occur.
  - When existing directory is specified, the "ls" command is execute 
    correctly.


CONFIGRATION:
   OS : Solaris 7, 8
   JDK: 1.4.1-b21/1.4.2-beta-b13
   

===========================================================================