Error at startup when using pydantic 2.4.0

[tronto20]

Problem description

pydantic v2.4.0 released recently, and it seems to be causing an error.

error log:

...
[2023-09-26 13:59:06 +0000] [1] [INFO] Using worker: uvicorn.workers.UvicornWorker
[2023-09-26 13:59:06 +0000] [7] [INFO] Booting worker with pid: 7
[2023-09-26 13:59:08 +0000] [7] [ERROR] Exception in worker process
Traceback (most recent call last):
  File "/opt/bitnami/python/lib/python3.11/site-packages/gunicorn/arbiter.py", line 589, in spawn_worker
    worker.init_process()
  File "/opt/bitnami/python/lib/python3.11/site-packages/uvicorn/workers.py", line 66, in init_process
    super(UvicornWorker, self).init_process()
  File "/opt/bitnami/python/lib/python3.11/site-packages/gunicorn/workers/base.py", line 134, in init_process
    self.load_wsgi()
  File "/opt/bitnami/python/lib/python3.11/site-packages/gunicorn/workers/base.py", line 146, in load_wsgi
    self.wsgi = self.app.wsgi()
                ^^^^^^^^^^^^^^^
  File "/opt/bitnami/python/lib/python3.11/site-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
                    ^^^^^^^^^^^
  File "/opt/bitnami/python/lib/python3.11/site-packages/gunicorn/app/wsgiapp.py", line 58, in load
    return self.load_wsgiapp()
           ^^^^^^^^^^^^^^^^^^^
  File "/opt/bitnami/python/lib/python3.11/site-packages/gunicorn/app/wsgiapp.py", line 48, in load_wsgiapp
    return util.import_app(self.app_uri)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/bitnami/python/lib/python3.11/site-packages/gunicorn/util.py", line 359, in import_app
    mod = importlib.import_module(module)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/bitnami/python/lib/python3.11/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/opt/bitnami/python/lib/python3.11/site-packages/titiler/application/main.py", line 16, in <module>
    from titiler.core.errors import DEFAULT_STATUS_CODES, add_exception_handlers
  File "/opt/bitnami/python/lib/python3.11/site-packages/titiler/core/__init__.py", line 5, in <module>
    from . import dependencies, errors, factory, routing  # noqa
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/bitnami/python/lib/python3.11/site-packages/titiler/core/factory.py", line 13, in <module>
    from geojson_pydantic.features import Feature, FeatureCollection
  File "/opt/bitnami/python/lib/python3.11/site-packages/geojson_pydantic/__init__.py", line 3, in <module>
    from .features import Feature, FeatureCollection  # noqa
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/bitnami/python/lib/python3.11/site-packages/geojson_pydantic/features.py", line 8, in <module>
    from geojson_pydantic.geometries import Geometry
  File "/opt/bitnami/python/lib/python3.11/site-packages/geojson_pydantic/geometries.py", line 317, in <module>
    GeometryCollection.model_rebuild()
  File "/opt/bitnami/python/lib/python3.11/site-packages/pydantic/main.py", line 470, in model_rebuild
    return _model_construction.complete_model_class(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/bitnami/python/lib/python3.11/site-packages/pydantic/_internal/_model_construction.py", line 498, in complete_model_class
    cls.__pydantic_core_schema__ = schema = validate_core_schema(schema)
                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/bitnami/python/lib/python3.11/site-packages/pydantic/_internal/_core_utils.py", line 631, in validate_core_schema
    return _validate_core_schema(schema)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pydantic_core._pydantic_core.SchemaError: Invalid Schema:
definitions.definitions.6.model.schema.model-fields.fields.geometries.schema.function-after.schema.list.items_schema.tagged-union.choices.GeometryCollection
{"loglevel": "info", "workers": 1, "bind": "0.0.0.0:8000", "graceful_timeout": 120, "timeout": 120, "keepalive": 5, "errorlog": "-", "accesslog": "-", "workers_per_core": 1.5, "use_max_workers": null, "host": "0.0.0.0", "port": "8000"}
{"loglevel": "info", "workers": 1, "bind": "0.0.0.0:8000", "graceful_timeout": 120, "timeout": 120, "keepalive": 5, "errorlog": "-", "accesslog": "-", "workers_per_core": 1.5, "use_max_workers": null, "host": "0.0.0.0", "port": "8000"}
  Recursion error - cyclic reference detected [type=recursion_loop, input_value={'type': 'model', 'cls': ...lection:94654473002400'}, input_type=dict]
    For further information visit https://errors.pydantic.dev/2.4/v/recursion_loop
[2023-09-26 13:59:08 +0000] [7] [INFO] Worker exiting (pid: 7)
...

I fixed titiler.core.pyproject.toml and solved it.

dependencies = [
...
    "pydantic<2.4.0",
...
]

Expected Output

Application must start successfully.

Environment Information

I used docker container built by dockerfiles/Dockerfile.gunicorn

[vincentsarago]

I'm on it over https://github.com/developmentseed/geojson-pydantic/issues/146 🙏

[vincentsarago]

should be fine now 🙏