Celery integration blocks running django commands

Start by reproducing the hang with manage.py and a Django command, then trace the integration from common/celery.py into scout_apm/celery.py, focusing on the install path shown in the traceback. Done means Django management commands complete without blocking when Celery integration is enabled.

When I try to run any django command it gets stuck and if I interrupt it this is the traceback I get. I enabled debug logs in case it's useful

DEBUG:scout_apm.core.config:Configuration Loaded:
DEBUG:scout_apm.core.config:Defaults : app_server =
DEBUG:scout_apm.core.config:Defaults : application_root = /app
DEBUG:scout_apm.core.config:Defaults : collect_remote_ip = True
DEBUG:scout_apm.core.config:Null     : core_agent_config_file = None
DEBUG:scout_apm.core.config:Defaults : core_agent_dir = /tmp/scout_apm_core
DEBUG:scout_apm.core.config:Defaults : core_agent_download = True
DEBUG:scout_apm.core.config:Defaults : core_agent_launch = True
DEBUG:scout_apm.core.config:Null     : core_agent_log_file = None
DEBUG:scout_apm.core.config:Defaults : core_agent_log_level = info
DEBUG:scout_apm.core.config:Defaults : core_agent_permissions = 700
DEBUG:scout_apm.core.config:Defaults : core_agent_socket_path = tcp://127.0.0.1:6590
DEBUG:scout_apm.core.config:Defaults : core_agent_version = v1.4.0
DEBUG:scout_apm.core.config:Defaults : disabled_instruments = []
DEBUG:scout_apm.core.config:Defaults : download_url = https://s3-us-west-1.amazonaws.com/scout-public-downloads/apm_core_agent/release
DEBUG:scout_apm.core.config:Defaults : framework =
DEBUG:scout_apm.core.config:Defaults : framework_version =
DEBUG:scout_apm.core.config:Defaults : hostname = None
DEBUG:scout_apm.core.config:Null     : ignore = None
DEBUG:scout_apm.core.config:Null     : log_level = None
DEBUG:scout_apm.core.config:Defaults : log_payload_content = False
DEBUG:scout_apm.core.config:Python   : monitor = True
DEBUG:scout_apm.core.config:Python   : name = testtest
DEBUG:scout_apm.core.config:Python   : revision_sha = 7c7c4ecc708cf45338d150b59ac654245d546877
DEBUG:scout_apm.core.config:Python   : scm_subdirectory = /core
DEBUG:scout_apm.core.config:Defaults : shutdown_message_enabled = True
DEBUG:scout_apm.core.config:Defaults : shutdown_timeout_seconds = 2.0
DEBUG:scout_apm.instruments.elasticsearch:Instrumenting elasticsearch.
DEBUG:scout_apm.instruments.elasticsearch:Couldn't import elasticsearch.Elasticsearch - probably not installed.
DEBUG:scout_apm.instruments.elasticsearch:Couldn't import elasticsearch.Transport or elastic_transport.Transport - probably not installed.
DEBUG:scout_apm.instruments.jinja2:Instrumenting Jinja2.
DEBUG:scout_apm.instruments.pymongo:Instrumenting pymongo.
DEBUG:scout_apm.instruments.pymongo:Couldn't import pymongo.Collection - probably not installed.
DEBUG:scout_apm.instruments.redis:Instrumenting redis.
DEBUG:scout_apm.instruments.urllib3:Instrumenting urllib3.
DEBUG:scout_apm.core:APM Launching on PID: 598
DEBUG:scout_apm.core.agent.manager:Core Agent manifest json: {'version': '1.4.0', 'core_agent_version': '1.4.0', 'core_agent_binary': 'core-agent', 'core_agent_binary_sha256': '1a24b1ab8a0ca7ffc831ca83614e0d4c2b4b801f4a4eec0c3cfa0a363caf6ff8'}
^CDEBUG:scout_apm.core.agent.socket:CoreAgentSocketThread attempt 1, connecting to tcp://127.0.0.1:6590, PID: 598, Thread: <CoreAgentSocketThread(Thread-1, stopped daemon 140094993512000)>
DEBUG:scout_apm.core.agent.socket:CoreAgentSocketThread connected
INFO:scout_apm.core.agent.commands:Registering with app=testtest key_prefix=XQb key_format_validated=True host=None
Traceback (most recent call last):
  File "/app/manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python3.10/dist-packages/django/core/management/__init__.py", line 419, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python3.10/dist-packages/django/core/management/__init__.py", line 395, in execute
    django.setup()
  File "/usr/local/lib/python3.10/dist-packages/django/__init__.py", line 19, in setup
    configure_logging(settings.LOGGING_CONFIG, settings.LOGGING)
  File "/usr/local/lib/python3.10/dist-packages/django/utils/log.py", line 75, in configure_logging
    logging_config_func(logging_settings)
  File "/usr/lib/python3.10/logging/config.py", line 810, in dictConfig
    dictConfigClass(config).configure()
  File "/usr/lib/python3.10/logging/config.py", line 544, in configure
    formatters[name] = self.configure_formatter(
  File "/usr/lib/python3.10/logging/config.py", line 676, in configure_formatter
    c = _resolve(cname)
  File "/usr/lib/python3.10/logging/config.py", line 90, in _resolve
    found = __import__(used)
  File "/app/common/__init__.py", line 1, in <module>
    from common import tasks  # noqa
  File "/app/common/tasks/__init__.py", line 1, in <module>
    from .maintenance import *  # noqa
  File "/app/common/tasks/maintenance.py", line 6, in <module>
    from common.celery import app
  File "/app/common/celery.py", line 26, in <module>
    scout_celery.install(app)
  File "/usr/local/lib/python3.10/dist-packages/scout_apm/celery.py", line 133, in install
    installed = scout_apm.core.install()
  File "/usr/local/lib/python3.10/dist-packages/scout_apm/compat.py", line 141, in wrapper
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/scout_apm/core/__init__.py", line 50, in install
    CoreAgentSocketThread.ensure_stopped()
  File "/usr/local/lib/python3.10/dist-packages/scout_apm/core/threading.py", line 44, in ensure_stopped
    cls._instance.join()DEBUG:scout_apm.core.tracked_request:Starting request: req-f0c17d8b-7f2b-47c0-b74c-3a81ab67f01f

  File "/usr/lib/python3.10/threading.py", line 1096, in join
DEBUG:urllib3.connectionpool:Starting new HTTPS connection (1): sentry.*****.****:443
    self._wait_for_tstate_lock()
  File "/usr/lib/python3.10/threading.py", line 1116, in _wait_for_tstate_lock
    if lock.acquire(block, timeout):
KeyboardInterrupt
DEBUG:urllib3.connectionpool:https://sentry.*****.****:443 "POST /api/2/store/ HTTP/1.1" 200 41
DEBUG:scout_apm.core.tracked_request:Stopping request: req-f0c17d8b-7f2b-47c0-b74c-3a81ab67f01f
DEBUG:scout_apm.core.tracked_request:Request req-f0c17d8b-7f2b-47c0-b74c-3a81ab67f01f start_time=2023-06-01 17:17:25.078999 end_time=2023-06-01 17:17:25.162968 duration=0.083969 active_spans=0 complete_spans=1 tags=0 hit_max=False is_real_request=False sent=False