class Hang {
    public static void main(String[] args) {
        Runtime r = Runtime.getRuntime();
        String cmd = "/bin/true";
        while (true) {
            System.out.println("Running " + cmd);
            try {
                Process p = r.exec(cmd);
                int v = p.waitFor();
                System.out.println(cmd + " returned " + v);
            } catch (Exception e) {
                System.err.println("Exception " + e);
            }
        }
    }
}

Consider the above program. When I run it under Solaris with jdk.beta, I get:

Running /bin/true
pid 790 status 0
Received sigchild for 790 exit=0
/bin/true returned 0
Running /bin/true

The second Process.waitFor() never returns, even though the process does exit.

DREL 11/27/95