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I'm trying to kill a detatched screen session. Recently I have started a screen session with the following java code:

  1. Just created a new ProcessBuilder: 

    ProcessBuilder pb = new ProcessBuilder("/bin/sh", "-c", "screen -mdS " + 
servername + " java " + "-Xms256M -Xmx" + max_ram + "M -jar server.jar 
").directory(tempDirectory);

  2. Started a new process

    try {

  Process p = pb.start(); // start a process
  subserver.setProcess(p); // save the process if we need it later again
  BufferedReader reader = new BufferedReader(new 

  InputStreamReader(p.getInputStream()));
  String line;
  while ((line = reader.readLine()) != null) {
    System.out.println(line);
  }

} catch (Exception e) {         
   e.printStackTrace();
}

But the question is: How to kill this new process ?

Vadim Kotov
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Pauligauli
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  • Go through javadoc of Process Class https://docs.oracle.com/javase/7/docs/api/java/lang/Process.html It has destroy() method which can be used to kill the process. – Pranav Maniar Apr 04 '18 at 17:46
  • The destroy() method doesnt work for me. Furthermore the isAlive() method of the process always return false. But the screen is still running. Is there any other way? – Pauligauli Apr 04 '18 at 17:49
  • No need for `sh -c`. Just execute screen directly: `new ProcessBuilder("screen", "-mdS", servername, "java", "-Xms256M", "-Xmx" + max_ram + "M", "-jar", "server.jar")`. Also, you can do away with your BufferedReader completely and instead call `pb.inheritIO();`, which will cause the process’s standard output to appear in your calling program’s standard output. – VGR Apr 04 '18 at 18:17

0 Answers0