How do I get my Python Qt app to close after using jpype in a QRunnable thread?

I'm using jpype in a QRunnable thread (using PySide2). When I try to close the app, by closing the main window, the Python script doesn't finish. I assume there are still some resources active.

The QThreadPool reports no active threads.

I've created a simple demo app. My real application requires the code in the thread to be run multiple times during its lifetime, so I can't do anything radical like shut down the JVM after the thread runs.

I'd like to know a clean way of tidying up when I want to close down.

import logging
import sys
import PySide2.QtCore as qtc
import PySide2.QtWidgets as qtw
import jpype


class Worker(qtc.QRunnable):
    def run(self):
        jpype.startJVM()
        logging.info("JVM started")


def main():
    logging.basicConfig(level=logging.INFO)

    app = qtw.QApplication(sys.argv)

    window = qtw.QWidget()
    window.show()

    thread_pool = qtc.QThreadPool()
    worker = Worker()

    logging.info("starting thread")
    thread_pool.start(worker)

    app.exec_()

import sys
import time
import logging
import jpype
import PySide2.QtCore as qtc
import PySide2.QtWidgets as qtw


class Worker(qtc.QRunnable):
    _status = None

    def __init__(self):
        super(Worker, self).__init__()
        self.status = -1

    @property
    def status(self):
        return self._status

    @status.setter
    def status(self, value):
        self._status = value

    def run(self):
        logging.info("JVM started")
        jpype.startJVM()
        while True:
            if self.status != -1:
                # jpype.stopJVM()
                logging.info("JVM stopped")
                break
            time.sleep(1)


def main():
    logging.basicConfig(level=logging.INFO)

    app = qtw.QApplication(sys.argv)

    window = qtw.QWidget()
    window.show()

    thread_pool = qtc.QThreadPool()
    worker = Worker()
    worker.status = -1
    logging.info("starting thread")
    thread_pool.start(worker)
    status = app.exec_()
    worker.status = status
    sys.exit(status)


if __name__ == "__main__":
    main()

output

INFO:root:starting thread
INFO:root:JVM started
INFO:root:JVM stopped