如果我终止进程，线程也会停止吗？

Question

I've following code :

#!/usr/bin/python3
import os
import subprocess
import time
import threading


class StartJar(threading.Thread):
    def run(self):
        os.system("java -jar <nazwa_appki>.jar")

jarFileRun = StartJar        
current_location = subprocess.getoutput("pwd")

while True:
    x = subprocess.getstatusoutput("git checkout master && git reset --hard && git fetch && git pull")
    if x[0] is 0:
        os.system("git checkout master && git reset --hard && git fetch && git pull")
        os.system("mvn clean package ~/your/path")

        try:
            process_pid = subprocess.check_output(['pgrep', '-f', 'tu_podaj_nazwe_procesu']).decode()
        except subprocess.CalledProcessError as e:
            print("pgrep failed because ({}):".format(e.returncode), e.output.decode())
        else:
            try:
                os.kill(int(process_pid), 9)
                print('Process with ' + process_pid + ' PID was killed.')
            except ProcessLookupError as e:
                print("Process were old...")
            except ValueError as e:
                print("There is no such process!")

        os.system("cp ~/your/path" + ' ' + current_location)
        jarFileRun.start()
    else:
        print('No changes was made...')

time.sleep(1800)

And I wonder if I kill process that my thread runs, it would close as well ? If no how do i terminate the thread to be able to run it once more with new changes that had came out for the file I want to execute ? I tried to find out in google something that stops thread but it didn't work for me when I added it to the first line of while statement.

Answer 1

If you terminate the process,all threads corresponding to that process would terminate. the process will still run if you terminate one of the threads in process.

Answer 2

No it will not terminate because the value daemon is by default False and it means that the thread doesn't stop when the main process finishes, it's totally independent. However, if you set the thread's daemon value to True it will run as long as the main process runs too.

In order to do so you can delete your StartJar class and define jarFileRun like this:

jarFileRun = threading.Thread(target=os.system, args=("java -jar <nazwa_appki>.jar",), daemon=True)

Or make an init definition inside the class for daemon