[BUG] Occasional error reporting:FAILED transport/test_ipc.py::IPCMessagePubSubCase::test_async_reading_streamclosederror - RuntimeError: IOLoop is already running

Description
Occasional error reporting:FAILED transport/test_ipc.py::IPCMessagePubSubCase::test_async_reading_streamclosederror - RuntimeError: IOLoop is already running

self = <tests.unit.transport.test_ipc.IPCMessagePubSubCase testMethod=test_async_reading_streamclosederror>

    @salt.ext.tornado.testing.gen_test
    def test_async_reading_streamclosederror(self):
        client1 = self.sub_channel
        call_cnt = []

        # Create a watchdog to be safe from hanging in sync loops (what old code did)
        evt = threading.Event()

        def close_server():
            if evt.wait(0.001):
                return
            client1.close()
            self.stop()

        watchdog = threading.Thread(target=close_server)
        watchdog.start()

        # Runs in ioloop thread so we're safe from race conditions here
        def handler(raw):
            pass

        try:
            ret1 = yield client1.read_async(handler)
>           self.wait()

/home/stage/root/spack-stage-py-salt-3006.8-ly6kzp7i3mswk5umrb4qmtykof3l6qz7/spack-src/tests/unit/transport/test_ipc.py:151:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/home/stage/root/spack-stage-py-salt-3006.8-ly6kzp7i3mswk5umrb4qmtykof3l6qz7/spack-src/salt/ext/tornado/testing.py:328: in wait
    self.io_loop.start()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <salt.ext.tornado.platform.epoll.EPollIOLoop object at 0xffff8ea5b9a0>

    def start(self):
        if self._running:
>           raise RuntimeError("IOLoop is already running")
E           RuntimeError: IOLoop is already running

/home/stage/root/spack-stage-py-salt-3006.8-ly6kzp7i3mswk5umrb4qmtykof3l6qz7/spack-src/salt/ext/tornado/ioloop.py:757: RuntimeError

FAILED transport/test_ipc.py::IPCMessagePubSubCase::test_async_reading_streamclosederror - RuntimeError: IOLoop is already running

Setup
(Please provide relevant configs and/or SLS files (be sure to remove sensitive info. There is no general set-up of Salt.)

Please be as specific as possible and give set-up details.

• [Yes ] on-prem machine
• VM (Virtualbox, KVM, etc. please specify)
• VM running on a cloud service, please be explicit and add details
• container (Kubernetes, Docker, containerd, etc. please specify)
• or a combination, please be explicit
• jails if it is FreeBSD
• classic packaging
• onedir packaging
• used bootstrap to install

Steps to Reproduce the behavior
1、spack install --keep-stage --dont-restage --no-checksum -y py-salt@3006.8
2、spack install --overwrite --keep-stage --no-checksum -y py-pip@20.2
3、pip install --use-feature=2020-resolver looseversion Jinja2 contextvars jmespath msgpack==1.0.0 psutil==6.1.1 pycryptodomex==3.9.8 pyzmq==25.0.2 more_itertools looseversion attr pytest==7.4.0 boto3 boto pytest-helpers-namespace
4、pip install -r /home/stage/root/spack-stage-py-salt-3006.8-ly6kzp7i3mswk5umrb4qmtykof3l6qz7/spack-src/requirements/pytest.txt
5、cd /home/stage/root/spack-stage-py-salt-3006.8-ly6kzp7i3mswk5umrb4qmtykof3l6qz7/spack-src/tests/unit
6、pytest -s -v

Expected behavior
no errors

Screenshots
If applicable, add screenshots to help explain your problem.

Versions Report

PASTE HERE

Additional context
Add any other context about the problem here.

Start with tests/unit/transport/test_ipc.py, especially IPCMessagePubSubCase.test_async_reading_streamclosederror and its call to self.wait(). Read salt/ext/tornado/testing.py and salt/ext/tornado/ioloop.py around wait() and start() to understand the overlapping loop state. Done means the test no longer intermittently raises RuntimeError: IOLoop is already running when the unit suite is run.