problem with reading stdout from a child process under jdk-1.1.6

[Mark Hofmann]

Hi all,
I encountered a problem when I start a prog from my
java-prog and
try to get the stdout or stderr.
The problem is, that I wrote the code with jdk-1.1.3,
changed my
system to Redhat 5.1 (with glibc)  and jdk-1.1.6 and now it
doesn't
work anymore. As long as stdout is empty there are no
problems
but when the prog tries to read the messages it simply
hangs.
To make myself a bit clearer, here is the code:

......
    Process process1;
    String msg=new String();
    Runtime run1=Runtime.getRuntime();
    try {
       process1=run1.exec(command);
       InputStream in=process1.getInputStream();
       BufferedReader in_read=new BufferedReader(new
InputStreamReader(in));
        //  it's happening here:
       while((msg=in_read.readLine()) != null){
           System.out.println(msg);
       }
   ....

Hope somebody knows a solution for that.

Thanks in advance

     Mark