Invalid...KeyError(f'No such transport: {transport}') Django Celery Valkey but only in production via gunicorn, django shell in prod pod does not reproduce #9836

timrichardson · 2025-07-26T07:45:34Z

timrichardson
Jul 26, 2025

this was a deployment error. the CELERY_BROKER_URL was being forced to the environment in a kubernetes deployment to allow a flower pod to know how to connect. But this seems to have poisoned the environment for other parts of the deployment. We have removed this step in the deployment, and the problem is gone.

This is my putative issue (bug report). I saw the checklist requirement to discuss it first. Well done that checklist.
Also "there are no matching discussions".

the celery .... report output is here.

First, here is the tldr:

I have a django app running for a long time with no problems.
A change that I am having trouble bisecting has lead to this situation:

my_task.delay() called from a django View results in failure for the caller
with the stack trace ending:

raise KeyError(f'No such transport: {transport}')

it seems to be an empty string being passed in, not None. The was found by some monkey patching.

GP TRACE [3]: kombu.transport.resolve_transport called with EMPTY transport: ''

yet on the same pod, I can create a Django shell, import the task, then make the delay() call from the python shell, and it works. The worker picks it up. Likewise, periodic jobs from celery beat, running on the same pod, work. I have a docker compose stack in dev, and I can not reproduce this problem. it's valkey 8.1 acting as redis.

The front end is gunicorn running in a process pool with normal threads.

Recently I added channels to the project.

It is Django 5.11

Full stack trace is:

Traceback (most recent call last):
  File "/install/lib/python3.13/site-packages/django/core/handlers/exception.py", line 55, in inner
    response = get_response(request)
  File "/install/lib/python3.13/site-packages/django/core/handlers/base.py", line 197, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/install/lib/python3.13/site-packages/django/views/generic/base.py", line 105, in view
    return self.dispatch(request, *args, **kwargs)
           ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/install/lib/python3.13/site-packages/django/contrib/auth/mixins.py", line 73, in dispatch
    return super().dispatch(request, *args, **kwargs)
           ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/install/lib/python3.13/site-packages/django/views/generic/base.py", line 144, in dispatch
    return handler(request, *args, **kwargs)
  File "/install/lib/python3.13/site-packages/django/views/generic/edit.py", line 151, in post
    return self.form_valid(form)
           ~~~~~~~~~~~~~~~^^^^^^
  File "/opt/app/cached_dear/views.py", line 496, in form_valid
    tasks.task_optimise_dear_cache.delay(job_id=job_id)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/install/lib/python3.13/site-packages/celery/app/task.py", line 444, in delay
    return self.apply_async(args, kwargs)
           ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^
  File "/install/lib/python3.13/site-packages/celery/app/task.py", line 594, in apply_async
    return app.send_task(
           ~~~~~~~~~~~~~^
        self.name, args, kwargs, task_id=task_id, producer=producer,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<2 lines>...
        **options
        ^^^^^^^^^
    )
    ^
  File "/install/lib/python3.13/site-packages/celery/app/base.py", line 797, in send_task
    with self.producer_or_acquire(producer) as P:
         ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/install/lib/python3.13/site-packages/celery/app/base.py", line 932, in producer_or_acquire
    producer, self.producer_pool.acquire, block=True,
              ^^^^^^^^^^^^^^^^^^
  File "/install/lib/python3.13/site-packages/celery/app/base.py", line 1354, in producer_pool
    return self.amqp.producer_pool
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "/install/lib/python3.13/site-packages/celery/app/amqp.py", line 591, in producer_pool
    self.app.connection_for_write()]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/install/lib/python3.13/site-packages/celery/app/base.py", line 829, in connection_for_write
    return self._connection(url or self.conf.broker_write_url, **kwargs)
           ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/install/lib/python3.13/site-packages/celery/app/base.py", line 880, in _connection
    return self.amqp.Connection(
           ~~~~~~~~~~~~~~~~~~~~^
        url,
        ^^^^
    ...<16 lines>...
        ),
        ^^
    )
    ^
  File "/install/lib/python3.13/site-packages/kombu/connection.py", line 201, in __init__
    if not get_transport_cls(transport).can_parse_url:
           ~~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/install/lib/python3.13/site-packages/kombu/transport/__init__.py", line 92, in get_transport_cls
    _transport_cache[transport] = resolve_transport(transport)
                                  ~~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/install/lib/python3.13/site-packages/kombu/transport/__init__.py", line 73, in resolve_transport
    raise KeyError(f'No such transport: {transport}')
KeyError: 'No such transport: '

this is celery report

I am going nuts over this, and the Celery config is pretty stripped down now.


cin7_sync.views
INFO 2025-07-26 07:35:15,987 celery Discovered task modules: ['cached_dear.tasks', 'cached_dear.tasks_1300_tempfence', 'cached_dear.tasks_diagnostics', 'cached_dear.tasks_equipmed', 'cached_dear.tasks_interior_icons', 'cached_dear.tasks_living_by_design', 'cached_dear.tasks_pickpackship', 'cached_dear.tasks_promise_dates', 'cached_dear.tasks_status_anxiety', 'cached_dear.tasks_tilecloud', 'cached_dear.tasks_webhooks', 'cached_dear.tasks_xero', 'cin7_omni_analytics.tasks', 'cin7_sync.tasks', 'core.tasks', 'dear_capsule.tasks', 'dear_purchasing.tasks', 'dear_zoho_analytics.tasks', 'payment_gateways.tasks', 'revel_pos.tasks', 'salesforce.tasks', 'starshipit.tasks', 'starshipit.tasks_interior_icons', 'shopify.tasks', 'shopify.tasks_loop', 'three_pl.tasks', 'three_pl.tasks_coco_edi', 'three_pl.tasks_djcity', 'three_pl.tasks_webhooks', 'three_pl_amethyst.tasks', 'three_pl_aurora.tasks', 'three_pl_dermapen.tasks', 'three_pl_onemile.tasks', 'three_pl_skyzer.tasks', 'three_pl_skyzer.tasks_3pl', 'three_pl_skyzer.tasks_webhooks', 'three_pl_torque.tasks', 'xysense.tasks', 'zoho_crm.tasks']

software -> celery:5.4.0 (opalescent) kombu:5.5.4 py:3.13.5
            billiard:4.2.1 redis:5.0.1
platform -> system:Linux arch:64bit
            kernel version:6.1.141-165.249.amzn2023.x86_64 imp:CPython
loader   -> celery.loaders.app.AppLoader
settings -> transport:redis results:redis://valkey-1-0.valkey-1-headless.valkey-server.svc.cluster.local:6379/3

ABSOLUTE_URL_OVERRIDES: 
 }
ADMINS: [('admin', '[email protected]')]
ALLOWED_HOSTS: ['*']
ANALYTICS_MINIMUM_DATE: None
APPEND_SLASH: True
APP_TIMEZONE: 'Australia/Melbourne'
ASGI_APPLICATION: 'project.asgi.application'
AUTHENTICATION_BACKENDS: ['django.contrib.auth.backends.ModelBackend']
AUTH_PASSWORD_VALIDATORS: '********'
AUTH_USER_MODEL: 'auth.User'
BASE_DIR: PosixPath('/opt/app')
CACHES: 
    'database_cache': {   'BACKEND': 'django.core.cache.backends.db.DatabaseCache',
                          'LOCATION': 'db_cache_table'},
    'default': {   'BACKEND': 'django.core.cache.backends.redis.RedisCache',
                   'LOCATION': 'redis://valkey-1-0.valkey-1-headless.valkey-server.svc.cluster.local:6379'}}
CACHE_MIDDLEWARE_ALIAS: 'default'
CACHE_MIDDLEWARE_KEY_PREFIX: '********'
CACHE_MIDDLEWARE_SECONDS: 600
CAPSULE_TOKEN: '********'
CAPSULE_TOKENS: 
 'ChefworksMY': None, 'ChefworksSG': None}
CELERYD_MAX_TASKS_PER_CHILD: 20
CELERYD_TASK_TIME_LIMIT: 43200
CELERY_BROKER_CONNECTION_MAX_RETRIES: 5
CELERY_BROKER_CONNECTION_RETRY: True
CELERY_BROKER_CONNECTION_RETRY_ON_STARTUP: True
CELERY_BROKER_CONNECTION_TIMEOUT: 2
CELERY_BROKER_TRANSPORT_OPTIONS: 
 'health_check_interval': 60, 'max_connections': 20, 'visibility_timeout': 3600}
CELERY_BROKER_URL: 'redis://valkey-1-0.valkey-1-headless.valkey-server.svc.cluster.local:6379/2'
CELERY_BROKER_USE_SSL: False
CELERY_CANCEL_TASKS_BY_DEFAULT: False
CELERY_DATABASE_NUMBER: '********'
CELERY_RESULT_BACKEND: 'redis://valkey-1-0.valkey-1-headless.valkey-server.svc.cluster.local:6379/3'
CELERY_RESULT_BACKEND_TRANSPORT_OPTIONS: 
 'max_connections': 20}
CELERY_RESULT_DATABASE_NUMBER: '********'
CELERY_TASK_ACKS_LATE: True
CELERY_TASK_DEFAULT_QUEUE: 'test-dear'
CELERY_TASK_GEVENT_QUEUE: 'test-dear-gevent'
CELERY_TASK_ROUTES: 
 '*_gevent': {'queue': 'test-dear-gevent'}}
CIN7_API_KEY: '********'
CIN7_ENTITY_TO_USE: None
CIN7_ORDER_CACHE_CHECK_URL: None
CIN7_ORDER_CACHE_SYNC_MONITOR_URL: None
CIN7_ORDER_PROMISE_CACHE_KEY: '********'
CIN7_ORDER_PROMISE_CACHE_PERIOD_SECONDS: 0
CONN_MAX_AGE: 0
CORS_ORIGIN_ALLOW_ALL: True
CRISPY_ALLOWED_TEMPLATE_PACKS: 'bootstrap5'
CRISPY_TEMPLATE_PACK: 'bootstrap5'
CSRF_COOKIE_AGE: 31449600
CSRF_COOKIE_DOMAIN: None
CSRF_COOKIE_HTTPONLY: False
CSRF_COOKIE_NAME: 'csrftoken'
CSRF_COOKIE_PATH: '/'
CSRF_COOKIE_SAMESITE: 'Lax'
CSRF_COOKIE_SECURE: False
CSRF_FAILURE_VIEW: 'django.views.csrf.csrf_failure'
CSRF_HEADER_NAME: 'HTTP_X_CSRFTOKEN'
CSRF_TRUSTED_ORIGINS: 
    ('https://*.shopify.com', 'https://*.growthpath.com.au')
CSRF_USE_SESSIONS: False
CTS_SHOPIFY_SHOP_NAME: None
DATABASES: 
    'dear_analytics': {   'ATOMIC_REQUESTS': False,
                          'AUTOCOMMIT': True,
                          'CONN_HEALTH_CHECKS': True,
                          'CONN_MAX_AGE': 120,
                          'ENGINE': 'django.db.backends.postgresql',
                          'HOST': 'database-dev-1.cdnsay0wsg51.us-east-1.rds.amazonaws.com',
                          'NAME': 'dear_analytics_test-dear',
                          'OPTIONS': {},
                          'PASSWORD': '********',
                          'PORT': '5432',
                          'TEST': {   'CHARSET': None,
                                      'COLLATION': None,
                                      'MIGRATE': True,
                                      'MIRROR': None,
                                      'NAME': None},
                          'TIME_ZONE': None,
                          'USER': 'dear_analytics_test-dear'},
    'default': {   'ATOMIC_REQUESTS': False,
                   'AUTOCOMMIT': True,
                   'CONN_HEALTH_CHECKS': True,
                   'CONN_MAX_AGE': 120,
                   'ENGINE': 'django.db.backends.postgresql',
                   'HOST': 'database-dev-1.cdnsay0wsg51.us-east-1.rds.amazonaws.com',
                   'NAME': 'django_api_sync_test-dear',
                   'OPTIONS': {},
                   'PASSWORD': '********',
                   'PORT': '5432',
                   'TEST': {   'CHARSET': None,
                               'COLLATION': None,
                               'MIGRATE': True,
                               'MIRROR': None,
                               'NAME': None},
                   'TIME_ZONE': None,
                   'USER': 'django_api_sync_test-dear'}}
DATABASE_ROUTERS: '********'
DATA_UPLOAD_MAX_MEMORY_SIZE: 2621440
DATA_UPLOAD_MAX_NUMBER_FIELDS: 100000
DATA_UPLOAD_MAX_NUMBER_FILES: 100
DATETIME_FORMAT: 'Y-m-d H:i:s T'
DATETIME_INPUT_FORMATS: ['%Y-%m-%d %H:%M:%S',
 '%Y-%m-%d %H:%M:%S.%f',
 '%Y-%m-%d %H:%M',
 '%m/%d/%Y %H:%M:%S',
 '%m/%d/%Y %H:%M:%S.%f',
 '%m/%d/%Y %H:%M',
 '%m/%d/%y %H:%M:%S',
 '%m/%d/%y %H:%M:%S.%f',
 '%m/%d/%y %H:%M']
DATE_FORMAT: 'Y-m-d'
DATE_INPUT_FORMATS: ['%Y-%m-%d']
DBBACKUP_STORAGE: 'django.core.files.storage.FileSystemStorage'
DBBACKUP_STORAGE_OPTIONS: 
 'location': '/opt/app/backups'}
DEAR_CAPSULE_SYNC: False
DEAR_ENTITY: 'GrowthPathTest'
DEAR_ENTITY_TO_USE: 'GrowthPathTest'
DEAR_INSTANCE_SET: 'GrowthPathTest'
DEAR_INSTANCE_SET_NAME: 'GrowthPathTest'
DEBUG: False
DEBUG_PROPAGATE_EXCEPTIONS: False
DECIMAL_SEPARATOR: '.'
DEFAULT_AUTO_FIELD: 'django.db.models.AutoField'
DEFAULT_CHARSET: 'utf-8'
DEFAULT_DAYS_FOR_PO_LEADTIME: 120
DEFAULT_DAYS_FOR_UNSHIPPABLE_ORDER: 112
DEFAULT_EXCEPTION_REPORTER: 'django.views.debug.ExceptionReporter'
DEFAULT_EXCEPTION_REPORTER_FILTER: 'django.views.debug.SafeExceptionReporterFilter'
DEFAULT_FROM_EMAIL: '[email protected]'
DEFAULT_INDEX_TABLESPACE: ''
DEFAULT_TABLESPACE: ''
DISALLOWED_USER_AGENTS: []
DJANGO_EXCEPTION_HANDLER: 'core.custom_exception_handler.custom_exception_handler'
DJANGO_ICONS: 
 'ICONS': {'edit': {'name': 'far fa-pencil'}}}
DJANGO_ROOT: '/opt/app'
DJANGO_TABLES2_TEMPLATE: 'django_tables2/bootstrap5.html'
EMAIL_BACKEND: 'sendgrid_backend.SendgridBackend'
EMAIL_HOST: 'localhost'
EMAIL_HOST_PASSWORD: '********'
EMAIL_HOST_USER: ''
EMAIL_PORT: 25
EMAIL_SSL_CERTFILE: None
EMAIL_SSL_KEYFILE: '********'
EMAIL_SUBJECT_PREFIX: '[Django] '
EMAIL_TIMEOUT: None
EMAIL_USE_LOCALTIME: False
EMAIL_USE_SSL: False
EMAIL_USE_TLS: False
ETL: 'GrowthPathTest'
EXCHANGERATES_API_KEY: '********'
FILE_UPLOAD_DIRECTORY_PERMISSIONS: None
FILE_UPLOAD_HANDLERS: ['django.core.files.uploadhandler.MemoryFileUploadHandler',
 'django.core.files.uploadhandler.TemporaryFileUploadHandler']
FILE_UPLOAD_MAX_MEMORY_SIZE: 2621440
FILE_UPLOAD_PERMISSIONS: 420
FILE_UPLOAD_TEMP_DIR: None
FIRST_DAY_OF_WEEK: 0
FIXTURE_DIRS: []
FORCE_SCRIPT_NAME: None
FORMAT_MODULE_PATH: None
FORMS_URLFIELD_ASSUME_HTTPS: False
FORM_RENDERER: 'django.forms.renderers.DjangoTemplates'
GOOGLE_OAUTH2_CLIENT_ID: '535025619750-71h99b6gi0psm1ppnjm1e1solifr5fdj.apps.googleusercontent.com'
GOOGLE_OAUTH2_CLIENT_SECRET: '********'
GOOGLE_OAUTH2_REGISTERED_REDIRECT_URI: 'https://test-dear.growthpath.com.au/auth/google/proxy_callback/'
GOOGLE_OAUTH2_SCOPES: ['openid',
 'https://www.googleapis.com/auth/userinfo.email',
 'https://www.googleapis.com/auth/userinfo.profile']
GOOGLE_PROXY_STATE_DELIMITER: '!GP_GOOG!'
IGNORABLE_404_URLS: []
IMAGE_TAG: '25-001026-master-9c28a0b39'
INSTALLED_APPS: ['channels',
 'whitenoise.runserver_nostatic',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.humanize',
 'dbbackup',
 'debug_toolbar',
 'django_tables2',
 'django_filters',
 'django_celery_beat',
 'django_jsonforms',
 'django_json_widget',
 'flat_json_widget',
 'crispy_forms',
 'crispy_bootstrap5',
 'django_extensions',
 'django_otp',
 'django_otp.plugins.otp_static',
 'django_otp.plugins.otp_totp',
 'django_otp.plugins.otp_email',
 'widget_tweaks',
 'two_factor',
 'two_factor.plugins.email',
 'corsheaders',
 'import_export',
 'rest_framework',
 'rest_framework.authtoken',
 'django_bootstrap5',
 'google_auth',
 'microsoft_auth',
 'cached_dear',
 'cin7_omni_analytics',
 'cin7_sync',
 'core',
 'dear_capsule',
 'dear_purchasing',
 'dear_zoho_analytics',
 'payment_gateways',
 'rest_api',
 'revel_pos',
 'salesforce',
 'sample_skeleton',
 'starshipit',
 'shopify',
 'three_pl',
 'three_pl_amethyst',
 'three_pl_aurora',
 'three_pl_dermapen',
 'three_pl_onemile',
 'three_pl_skyzer',
 'three_pl_torque',
 'xysense',
 'django.contrib.admin',
 'zoho_crm']
INTERNAL_IPS: ['192.168.132.1', '127.0.0.1', '10.0.2.2']
INVENTORY_HOSTNAME_FULL: 'test-dear.growthpath.com.au'
INVENTORY_HOSTNAME_URL: 'https://test-dear.growthpath.com.au'
LANGUAGES: [('af', 'Afrikaans'),
 ('ar', 'Arabic'),
 ('ar-dz', 'Algerian Arabic'),
 ('ast', 'Asturian'),
 ('az', 'Azerbaijani'),
 ('bg', 'Bulgarian'),
 ('be', 'Belarusian'),
 ('bn', 'Bengali'),
 ('br', 'Breton'),
 ('bs', 'Bosnian'),
 ('ca', 'Catalan'),
 ('ckb', 'Central Kurdish (Sorani)'),
 ('cs', 'Czech'),
 ('cy', 'Welsh'),
 ('da', 'Danish'),
 ('de', 'German'),
 ('dsb', 'Lower Sorbian'),
 ('el', 'Greek'),
 ('en', 'English'),
 ('en-au', 'Australian English'),
 ('en-gb', 'British English'),
 ('eo', 'Esperanto'),
 ('es', 'Spanish'),
 ('es-ar', 'Argentinian Spanish'),
 ('es-co', 'Colombian Spanish'),
 ('es-mx', 'Mexican Spanish'),
 ('es-ni', 'Nicaraguan Spanish'),
 ('es-ve', 'Venezuelan Spanish'),
 ('et', 'Estonian'),
 ('eu', 'Basque'),
 ('fa', 'Persian'),
 ('fi', 'Finnish'),
 ('fr', 'French'),
 ('fy', 'Frisian'),
 ('ga', 'Irish'),
 ('gd', 'Scottish Gaelic'),
 ('gl', 'Galician'),
 ('he', 'Hebrew'),
 ('hi', 'Hindi'),
 ('hr', 'Croatian'),
 ('hsb', 'Upper Sorbian'),
 ('hu', 'Hungarian'),
 ('hy', 'Armenian'),
 ('ia', 'Interlingua'),
 ('id', 'Indonesian'),
 ('ig', 'Igbo'),
 ('io', 'Ido'),
 ('is', 'Icelandic'),
 ('it', 'Italian'),
 ('ja', 'Japanese'),
 ('ka', 'Georgian'),
 ('kab', 'Kabyle'),
 ('kk', 'Kazakh'),
 ('km', 'Khmer'),
 ('kn', 'Kannada'),
 ('ko', 'Korean'),
 ('ky', 'Kyrgyz'),
 ('lb', 'Luxembourgish'),
 ('lt', 'Lithuanian'),
 ('lv', 'Latvian'),
 ('mk', 'Macedonian'),
 ('ml', 'Malayalam'),
 ('mn', 'Mongolian'),
 ('mr', 'Marathi'),
 ('ms', 'Malay'),
 ('my', 'Burmese'),
 ('nb', 'Norwegian Bokmål'),
 ('ne', 'Nepali'),
 ('nl', 'Dutch'),
 ('nn', 'Norwegian Nynorsk'),
 ('os', 'Ossetic'),
 ('pa', 'Punjabi'),
 ('pl', 'Polish'),
 ('pt', 'Portuguese'),
 ('pt-br', 'Brazilian Portuguese'),
 ('ro', 'Romanian'),
 ('ru', 'Russian'),
 ('sk', 'Slovak'),
 ('sl', 'Slovenian'),
 ('sq', 'Albanian'),
 ('sr', 'Serbian'),
 ('sr-latn', 'Serbian Latin'),
 ('sv', 'Swedish'),
 ('sw', 'Swahili'),
 ('ta', 'Tamil'),
 ('te', 'Telugu'),
 ('tg', 'Tajik'),
 ('th', 'Thai'),
 ('tk', 'Turkmen'),
 ('tr', 'Turkish'),
 ('tt', 'Tatar'),
 ('udm', 'Udmurt'),
 ('ug', 'Uyghur'),
 ('uk', 'Ukrainian'),
 ('ur', 'Urdu'),
 ('uz', 'Uzbek'),
 ('vi', 'Vietnamese'),
 ('zh-hans', 'Simplified Chinese'),
 ('zh-hant', 'Traditional Chinese')]
LANGUAGES_BIDI: ['he', 'ar', 'ar-dz', 'ckb', 'fa', 'ug', 'ur']
LANGUAGE_CODE: 'en-us'
LANGUAGE_COOKIE_AGE: None
LANGUAGE_COOKIE_DOMAIN: None
LANGUAGE_COOKIE_HTTPONLY: False
LANGUAGE_COOKIE_NAME: 'django_language'
LANGUAGE_COOKIE_PATH: '/'
LANGUAGE_COOKIE_SAMESITE: None
LANGUAGE_COOKIE_SECURE: False
LOCALE_PATHS: []
LOCAL_SETTINGS_DIR: '/opt/app/project/local_settings.d'
LOGGING: 
    'disable_existing_loggers': False,
    'filters': {   'require_debug_false': {   '()': 'django.utils.log.RequireDebugFalse'},
                   'require_debug_true': {   '()': 'django.utils.log.RequireDebugTrue'}},
    'formatters': {   'json': {   'format': '%(asctime)s %(name)s '
                                            '%(levelname)s %(queue)s '
                                            '%(message)s %(process)d '
                                            '%(thread)d %(task_id)s '
                                            '%(task_name)s'},
                      'simple': {   'format': '%(levelname)s %(asctime)s '
                                              '%(module)s %(message)s'},
                      'verbose': {   'format': '%(levelname)s %(asctime)s '
                                               '%(module)s %(message)s'}},
    'handlers': {   'applogfile': {   'backupCount': 12,
                                      'class': 'logging.handlers.RotatingFileHandler',
                                      'filename': '/opt/app/logs/django_api_sync.log',
                                      'formatter': 'verbose',
                                      'level': 'INFO',
                                      'maxBytes': 524288000},
                    'console': {   'class': 'logging.StreamHandler',
                                   'formatter': 'simple',
                                   'level': 'DEBUG'},
                    'mail_admins': {   'class': 'django.utils.log.AdminEmailHandler',
                                       'filters': ['require_debug_false'],
                                       'level': 'ERROR'}},
    'loggers': {   'celery': {   'handlers': ['console'],
                                 'level': 'INFO',
                                 'propagate': False},
                   'django': {   'handlers': ['applogfile', 'console'],
                                 'level': 'INFO',
                                 'propogate': True},
                   'django.db.backends': {   'handlers': [   'applogfile',
                                                             'console'],
                                             'level': 'ERROR'},
                   'django.templates': {   'handlers': ['console'],
                                           'level': 'ERROR'},
                   'root': {   'handlers': ['applogfile', 'console'],
                               'level': 'INFO'}},
    'version': 1}
LOGGING_CONFIG: 'logging.config.dictConfig'
LOGIN_REDIRECT_URL: 'two_factor:profile'
LOGIN_URL: 'custom_login'
LOGOUT_REDIRECT_URL: None
LOOP_RETURNS: None
MAINTENANCE_MODE: 0
MANAGERS: []
MEDIA_ROOT: '/media'
MEDIA_URL: '/media/'
MESSAGE_STORAGE: 'django.contrib.messages.storage.fallback.FallbackStorage'
MICROSOFT_OAUTH2_CLIENT_ID: 'a7e3a337-917b-43b0-8caa-1e6e9eaf3b73'
MICROSOFT_OAUTH2_CLIENT_SECRET: '********'
MICROSOFT_OAUTH2_REGISTERED_REDIRECT_URI: 'https://test-dear.growthpath.com.au/auth/microsoft/proxy_callback/'
MICROSOFT_OAUTH2_SCOPES: ['openid', 'email', 'profile', 'User.Read']
MICROSOFT_OAUTH2_TENANT_ID: 'common'
MICROSOFT_PROXY_STATE_DELIMITER: '!GP_MS!'
MIDDLEWARE: ['corsheaders.middleware.CorsMiddleware',
 'django.middleware.security.SecurityMiddleware',
 'debug_toolbar.middleware.DebugToolbarMiddleware',
 'whitenoise.middleware.WhiteNoiseMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django_otp.middleware.OTPMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'core.middleware.CheckAppMiddleware',
 'core.middleware.TimezoneMiddleware']
MIGRATION_MODULES: 
 }
MONTH_DAY_FORMAT: 'F j'
NETO_PROMISE_DATES_API_KEY: '********'
NETO_PROMISE_DATE_FIELD: None
NETO_UPDATE_HEALTH_CHECK_URL: None
NUMBER_GROUPING: 0
PASSWORD_HASHERS: '********'
PASSWORD_RESET_TIMEOUT: '********'
PEPPERI_API: '********'
PEPPERI_ENTITY_TO_USE: None
PEPPERI_ORDER_HEALTH_CHECK_URL: None
POD_HOSTNAME: 'django-api-sync-767b594d7b-5fmqv'
POSTGRESQL_ANALYTICS: '1'
POSTGRESQL_ANALYTICS_SYNC_MONITOR_URL: None
PREPEND_WWW: False
PROJECT_NAME: 'GrowthPath Application Server'
PROMISE_CACHE_PERIOD_SECONDS: 0
PROMISE_DATES_HEALTH_CHECK_URL: None
REBUILD_DEAR_ORDER_CACHE_PERIODICALLY: True
REBUILD_DEAR_PROMISE_DATE_CACHE_PERIODICALLY: False
REBUILD_ORDER_CACHE_PERIODICALLY: False
REDIS_DB: 0
REDIS_HOST: 'valkey-1-0.valkey-1-headless.valkey-server.svc.cluster.local'
REDIS_JOB_LOG_CHANNEL: 'job_log_channel_test-dear'
REDIS_PORT: 6379
REST_FRAMEWORK: 
    'DEFAULT_AUTHENTICATION_CLASSES': [   'rest_framework.authentication.BasicAuthentication',
                                          'rest_framework.authentication.SessionAuthentication',
                                          'rest_framework.authentication.TokenAuthentication'],
    'DEFAULT_PERMISSION_CLASSES': ('rest_framework.permissions.IsAdminUser',)}
ROOT_URLCONF: 'project.urls'
SALESFORCE_OAUTH: 
 'client_id': '', 'client_secret': '********'}
SECRET_KEY: '********'
SECRET_KEY_FALLBACKS: '********'
SECURE_CONTENT_TYPE_NOSNIFF: True
SECURE_CROSS_ORIGIN_OPENER_POLICY: 'same-origin'
SECURE_HSTS_INCLUDE_SUBDOMAINS: False
SECURE_HSTS_PRELOAD: False
SECURE_HSTS_SECONDS: 0
SECURE_PROXY_SSL_HEADER: None
SECURE_REDIRECT_EXEMPT: []
SECURE_REFERRER_POLICY: 'same-origin'
SECURE_SSL_HOST: None
SECURE_SSL_REDIRECT: False
SENDGRID_API_KEY: '********'
SENDGRID_TRACK_CLICKS_HTML: False
SENDGRID_TRACK_CLICKS_PLAIN: False
SENDGRID_TRACK_EMAIL_OPENS: False
SERVER_EMAIL: '[email protected]'
SESSION_CACHE_ALIAS: 'default'
SESSION_COOKIE_AGE: 1209600
SESSION_COOKIE_DOMAIN: None
SESSION_COOKIE_HTTPONLY: True
SESSION_COOKIE_NAME: 'sessionid'
SESSION_COOKIE_PATH: '/'
SESSION_COOKIE_SAMESITE: 'Lax'
SESSION_COOKIE_SECURE: False
SESSION_ENGINE: 'django.contrib.sessions.backends.db'
SESSION_EXPIRE_AT_BROWSER_CLOSE: False
SESSION_FILE_PATH: None
SESSION_SAVE_EVERY_REQUEST: False
SESSION_SERIALIZER: 'django.contrib.sessions.serializers.JSONSerializer'
SETTINGS_MODULE: 'project.settings'
SHOPIFY_API_VERSION: '********'
SHOPIFY_PAYMENTS: None
SHOPIFY_PROMISE_DATE_FIELD: None
SHOPIFY_SHOP_NAME: None
SHOPIFY_STOCK_SYNC: '1'
SHORT_DATETIME_FORMAT: 'Y-m-d H:i:s T'
SHORT_DATE_FORMAT: 'm/d/Y'
SHORT_HOSTNAME: 'test-dear'
SIGNING_BACKEND: 'django.core.signing.TimestampSigner'
SILENCED_SYSTEM_CHECKS: []
SSL_CERTIFICATE: '/secrets/fullchain.pem'
SSL_CERTIFICATE_KEY: '********'
STATICFILES_DIRS: []
STATICFILES_FINDERS: ['django.contrib.staticfiles.finders.FileSystemFinder',
 'django.contrib.staticfiles.finders.AppDirectoriesFinder']
STATIC_ROOT: '/static'
STATIC_URL: '/static/'
STORAGES: 
    'default': {'BACKEND': 'django.core.files.storage.FileSystemStorage'},
    'staticfiles': {   'BACKEND': 'django.contrib.staticfiles.storage.StaticFilesStorage'}}
TEMPLATES: [{'APP_DIRS': True,
  'BACKEND': 'django.template.backends.django.DjangoTemplates',
  'DIRS': ['/opt/app/templates'],
  'OPTIONS': {'context_processors': ['django.template.context_processors.debug',
                                     'django.template.context_processors.request',
                                     'django.contrib.auth.context_processors.auth',
                                     'django.contrib.messages.context_processors.messages',
                                     'core.context_processors.project_name',
                                     'core.context_processors.version_number',
                                     'core.context_processors.settings_for_templates',
                                     'core.context_processors.xero_login_url',
                                     'core.context_processors.current_application_details',
                                     'core.context_processors.timezone_context']}}]
TESTING: False
TEST_NON_SERIALIZED_APPS: []
TEST_RUNNER: 'django.test.runner.DiscoverRunner'
THOUSAND_SEPARATOR: ','
TIME_FORMAT: 'P'
TIME_INPUT_FORMATS: ['%H:%M:%S', '%H:%M:%S.%f', '%H:%M']
TIME_ZONE: 'UTC'
TWO_FACTOR_REMEMBER_COOKIE_AGE: 1209600
USE_I18N: True
USE_L10N: False
USE_THOUSAND_SEPARATOR: False
USE_TZ: True
USE_X_FORWARDED_HOST: False
USE_X_FORWARDED_PORT: False
VERSION: '25-001026-master-9c28a0b39'
WEASYPRINT_BASEURL: '/'
WEBSOCKET_SERVER_PORT_EXTERNAL: '443'
WEBSOCKET_SERVER_PORT_INTERNAL: '8080'
WSGI_APPLICATION: 'project.wsgi.application'
XERO_APP_PROXY_REDIRECT_URI: 'https://test-dear.growthpath.com.au/proxy_xero_auth'
XERO_SIGNIN_CLIENT_ID: 'F7306038AF3D418DBD940FF25780F40B'
XERO_SIGNIN_CLIENT_SECRET: '********'
XERO_SIGNIN_STATE: 'https://test-dear.growthpath.com.au!Xf149DYFU9sFdDrc14eTeDLMIXnYcMhonKdxkYFU3VMIgcjp'
XERO_STATE_SECRET: '********'
X_FRAME_OPTIONS: 'DENY'
YEAR_MONTH_FORMAT: 'F Y'
ZOHO_ACCOUNT_SYNC_MODE: None
ZOHO_ANALYTICS: '1'
ZOHO_ANALYTICS_EMAIL: '[email protected]'
ZOHO_ANALYTICS_HEALTHCHECK_URL: None
ZOHO_AUTH_REDIRECT_URI: 'https://test-dear.growthpath.com.au/dear_zoho_analytics/zoho_analytics_proxied_auth_redirect'
ZOHO_CRM_AUTH_REDIRECT_URI: 'https://test-dear.growthpath.com.au/zoho_crm/zoho_proxied_auth_redirect'
ZOHO_CRM_EMAIL: '[email protected]'
ZOHO_DEAR_CRM_SYNC_MONITOR_URL: None
ZOHO_DEAR_INTEGRITY_MONITOR_URL: None
ZOHO_DEAR_PRODUCT_MOVEMENTS_SYNC_MONITOR_URL: None
is_overridden: <bound method Settings.is_overridden of <Settings "project.settings">>
deprecated_settings: None
task_routes: 
 'core.tasks.send_outbound_webhook_task': {'queue': 'gevent'}}




















# Checklist
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- [ ] I have verified that the issue exists against the `main` branch of Celery.
- [ ] This has already been asked to the [discussions forum](https://github.com/celery/celery/discussions) first.
- [ ] I have read the relevant section in the
  [contribution guide](https://docs.celeryq.dev/en/main/contributing.html#other-bugs)
  on reporting bugs.
- [ ] I have checked the [issues list](https://github.com/celery/celery/issues?q=is%3Aissue+label%3A%22Issue+Type%3A+Bug+Report%22+-label%3A%22Category%3A+Documentation%22)
  for similar or identical bug reports.
- [ ] I have checked the [pull requests list](https://github.com/celery/celery/pulls?q=is%3Apr+label%3A%22PR+Type%3A+Bugfix%22+-label%3A%22Category%3A+Documentation%22)
  for existing proposed fixes.
- [ ] I have checked the [commit log](https://github.com/celery/celery/commits/main)
  to find out if the bug was already fixed in the main branch.
- [ ] I have included all related issues and possible duplicate issues
  in this issue (If there are none, check this box anyway).
- [ ] I have tried to reproduce the issue with [pytest-celery](https://docs.celeryq.dev/projects/pytest-celery/en/latest/userguide/celery-bug-report.html) and added the reproduction script below.

## Mandatory Debugging Information

- [ ] I have included the output of ``celery -A proj report`` in the issue.
    (if you are not able to do this, then at least specify the Celery
     version affected).
- [ ] I have verified that the issue exists against the `main` branch of Celery.
- [ ] I have included the contents of ``pip freeze`` in the issue.
- [ ] I have included all the versions of all the external dependencies required
  to reproduce this bug.

## Optional Debugging Information
<!--
Try some of the below if you think they are relevant.
It will help us figure out the scope of the bug and how many users it affects.
-->
- [ ] I have tried reproducing the issue on more than one Python version
  and/or implementation.
- [ ] I have tried reproducing the issue on more than one message broker and/or
  result backend.
- [ ] I have tried reproducing the issue on more than one version of the message
  broker and/or result backend.
- [ ] I have tried reproducing the issue on more than one operating system.
- [ ] I have tried reproducing the issue on more than one workers pool.
- [ ] I have tried reproducing the issue with autoscaling, retries,
  ETA/Countdown & rate limits disabled.
- [ ] I have tried reproducing the issue after downgrading
  and/or upgrading Celery and its dependencies.

## Related Issues and Possible Duplicates
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or possible duplicates to this issue as requested by the checklist above.

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#### Related Issues

- None

#### Possible Duplicates

- None

## Environment & Settings
<!-- Include the contents of celery --version below -->
**Celery version**:
<!-- Include the output of celery -A proj report below -->
<details>
<summary><b><code>celery report</code> Output:</b></summary>
<p>


</p>
</details>

# Steps to Reproduce

## Required Dependencies
<!-- Please fill the required dependencies to reproduce this issue -->
- **Minimal Python Version**: N/A or Unknown
- **Minimal Celery Version**: N/A or Unknown
- **Minimal Kombu Version**: N/A or Unknown
- **Minimal Broker Version**: N/A or Unknown
- **Minimal Result Backend Version**: N/A or Unknown
- **Minimal OS and/or Kernel Version**: N/A or Unknown
- **Minimal Broker Client Version**: N/A or Unknown
- **Minimal Result Backend Client Version**: N/A or Unknown

### Python Packages
<!-- Please fill the contents of pip freeze below -->
<details>
<summary><b><code>pip freeze</code> Output:</b></summary>
<p>


</p>
</details>

### Other Dependencies
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and other dependency information if applicable
-->
<details>
<p>
N/A
</p>
</details>

## Minimally Reproducible Test Case
<!--
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<details>
<p>

```python

Expected Behavior

Actual Behavior

auvipy · 2025-07-28T10:50:51Z

auvipy
Jul 28, 2025
Maintainer

use celery 5.5.x

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Invalid...KeyError(f'No such transport: {transport}') Django Celery Valkey but only in production via gunicorn, django shell in prod pod does not reproduce #9836

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Invalid...KeyError(f'No such transport: {transport}') Django Celery Valkey but only in production via gunicorn, django shell in prod pod does not reproduce #9836

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auvipy Jul 28, 2025 Maintainer

timrichardson
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auvipy
Jul 28, 2025
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