Java Runtime.getRuntime().exec() fails after calling it several hundred times

Question

I have a Java program that executes Runtime.getRuntime().exec(\"ls -l\"); many times, once for each directory in the system.

My test system has more than 1,000 direc

Answer 1

You should explicitly close the input/output streams when using Runtime.getRuntime().exec.

Process p = null;
try {
    p = Runtime.getRuntime().exec("ls -l");
    //process output here
    p.waitFor();
} finally {
    if (p != null) {
        p.getOutputStream().close();
        p.getInputStream().close();
        p.getErrorStream().close(); 
    }
}