Runtime.getRuntime().exec(...) kill process and children

Question

In the code snippet provided below a new process is started from Java. The new process is a shell that starts some Linux utilities. The problem I have is that 'atop' and 'awk' utilities are still running after calling process.destroy(). I have tried process.destroyForcibly() but no improvements. The variable continueMonitoring is updated from a different thread.

Question destroy all proceses does not address the problem of stooping processes that use pipe mechanism between them, in my case I don't even have the PIDs for all the processes that are started.

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.reflect.Field;

public class MinimalClient {
    boolean continueMonitoring = true;

    public static void main(String[] args) throws InterruptedException {
        MinimalClient mc = new MinimalClient();
        mc.startMonitoring();
    }


    public void startMonitoring() throws InterruptedException {
        Thread cpuMonit = new Thread(new Runnable() {
            @Override
            public void run() {
                String line;
                Process process;
                StringBuilder commandOutput = new StringBuilder();

                String processPid = getPid();
                String[] cmd = {
                        "/bin/sh",
                        "-c",
                        " atop 1 -a | unbuffer -p awk '/" + processPid + "|nmap/ {print $1 \" \" $11}'"
                };

                try {
                    process = Runtime.getRuntime().exec(cmd);
                    Field pid = process.getClass().getDeclaredField("pid");
                    pid.setAccessible(true);
                    BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()));

                    while ( continueMonitoring && (line = br.readLine()) != null) {
                        commandOutput.append(line + "\n");
                    }
                    process.destroy();
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (NoSuchFieldException e) {
                    e.printStackTrace();
                }

            }
        });
        cpuMonit.start();
        Thread.sleep(10000);
        continueMonitoring = false;
    }

    private String getPid() {
        String processName = java.lang.management.ManagementFactory.getRuntimeMXBean().getName();
        return processName.split("@")[0];
    }
}