Issue with Runtime.exec() or ProcessBuilder pb.start()

Question

I am having problem with running a separate JVM process. The finished code must be able to start and forcibly stop the spawned process. The problem I am having is that the spawned process seems to hang. I have tried reading all output from the process with no luck. The java program opens a ServerSocket on a separate thread right away. However, when this is started through Runtime.exec() or ProcessBuilder the socket does not open until the first process is terminated. I have have been looking high and low for an answer that will fix this. I could write this all as a multithreaded application, however I would really like to isolate the second process in terms of the JVM settings. I would like to be able to monitor this process directly and indirectly for failure or early termination and restart it automatically. Other Java program I run with this method experience the same problem--a hang at a variable point in execution that is not relieved until the originating process ends.
        try {
            ProcessBuilder pb = new ProcessBuilder("\"C:\\Program Files\\Java\\jre6\\bin\\java.exe\" -jar -server \"PATHTOJAR\"");
            Process p = pb.start();
            java.io.InputStream is = p.getInputStream();
            while(running) System.out.print(is.read());
        catch (java.io.IOException ioe) { ioe.printStackTrace(); }

Answer 1

The finished code must be able to start and forcibly stop the spawned process.Process.destroy().
I have tried reading all output from the process with no luck.No you haven't - see below.
The java program opens a ServerSocket on a separate thread right away. However, when this is started through Runtime.exec() or ProcessBuilder the socket does not open until the first process is terminated.Which of these programs is which?
ProcessBuilder pb = new ProcessBuilder("\"C:\\Program Files\\Java\\jre6\\bin\\java.exe\" -jar -server \"PATHTOJAR\"");That should be
ProcessBuilder pb = new ProcessBuilder("C:\\Program Files\\Java\\jre6\\bin\\java.exe", "-jar", "PATHTOJAR", "-server");
java.io.InputStream is = p.getInputStream();
while(running) System.out.print(is.read());(a) call ProcessBuilder.redirectErrorStream(true);
(b) the loop must stop when is.read() returns -1, and you shouldn't print that value.