Runtime.exec(cmd) hangs up

From:

Vic <vikrantp@gmail.com>

Newsgroups:

comp.lang.java.programmer

Date:

24 May 2007 15:43:27 -0700

Message-ID:

<1180046607.237152.145810@r19g2000prf.googlegroups.com>

I am having a problem with Runtime.exec(cmd) where cmd is a string and
is as follows -

cmd = "home/qaplay/loader/604/soaploaderclient.ps nemo 50624 55604
genevaman qa /home/vpatanka/604Current/lib/loader/data/
DuplicateTransactionTest.0.lrd -bcp > & $GVHOME/tempOut.txt"

The actual code is like this ->
public CommandExecuter (String cmd) throws java.io.IOException{
    System.out.println("CommandExecuter: EXECUTING COMMAND: "+cmd);
    Process proc = Runtime.getRuntime().exec(cmd);

    BufferedReader in = new BufferedReader(new
InputStreamReader(proc.getInputStream()));
    BufferedReader err = new BufferedReader(new
InputStreamReader(proc.getErrorStream()));

    stdout = "";
    while ((line = in.readLine()) != null)
        stdout += line +"\n";
    if (stdout == "")
        stdout = null;

    stderr = "";
    while ((line = err.readLine()) != null)
        stderr += line +"\n";
    if (stderr == "")
        stderr = null;

    //System.out.println ("CommandExecuter stdout="+stdout);
    //System.out.println ("CommandExecuter stderr="+stderr);
    }
}

I can run the same cmd on the shell and I get a an output which is
pretty big so I am not copying it over here but if you guyz need it
then I can do that. Please let me know what am I missing here in
Runtime.exec() or its something else