When save WebApp setting Internal Server Error

[elissa1997]

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Dify version

1.0.0

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

In the chatbot monitoring page, when opening the settings popup and saving, the system prompts “500 Internal Server Error ”.

✔️ Expected Behavior

No response

❌ Actual Behavior

docker logs docker-api-1

2025-02-28 21:02:58.899 ERROR [Dummy-37] [app.py:875] - Exception on /console/api/apps/b98ae298-****-****-****-99133018ac8a/site [POST]
Traceback (most recent call last):
  File "/app/api/.venv/lib/python3.12/site-packages/flask/app.py", line 917, in full_dispatch_request
    rv = self.dispatch_request()
         ^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask/app.py", line 902, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)  # type: ignore[no-any-return]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask_restful/__init__.py", line 489, in wrapper
    resp = resource(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask/views.py", line 110, in view
    return current_app.ensure_sync(self.dispatch_request)(**kwargs)  # type: ignore[no-any-return]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask_restful/__init__.py", line 604, in dispatch_request
    resp = meth(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/controllers/console/wraps.py", line 147, in decorated
    return view(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/libs/login.py", line 94, in decorated_view
    return current_app.ensure_sync(func)(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/controllers/console/wraps.py", line 27, in decorated
    return view(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/controllers/console/app/wraps.py", line 48, in decorated_view
    return view_func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask_restful/__init__.py", line 701, in wrapper
    return marshal(resp, self.fields, self.envelope)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask_restful/__init__.py", line 657, in marshal
    return OrderedDict([(envelope, OrderedDict(items))]) if envelope else OrderedDict(items)
                                                                          ^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask_restful/__init__.py", line 655, in <genexpr>
    else make(v).output(k, data))
         ^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask_restful/fields.py", line 118, in output
    value = get_value(key if self.attribute is None else self.attribute, obj)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask_restful/fields.py", line 40, in get_value
    return _get_value_for_keys(key.split('.'), obj, default)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask_restful/fields.py", line 45, in _get_value_for_keys
    return _get_value_for_key(keys[0], obj, default)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask_restful/fields.py", line 57, in _get_value_for_key
    return getattr(obj, key, default)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/attributes.py", line 566, in __get__
    return self.impl.get(state, dict_)  # type: ignore[no-any-return]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/attributes.py", line 1086, in get
    value = self._fire_loader_callables(state, key, passive)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/attributes.py", line 1116, in _fire_loader_callables
    return state._load_expired(state, passive)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/state.py", line 803, in _load_expired
    self.manager.expired_attribute_loader(self, toload, passive)
  File "/app/api/.venv/lib/python3.12/site-packages/sqlalchemy/orm/loading.py", line 1603, in load_scalar_attributes
    raise orm_exc.DetachedInstanceError(
sqlalchemy.orm.exc.DetachedInstanceError: Instance <Site at 0x776d01c0c560> is not bound to a Session; attribute refresh operation cannot proceed (Background on this error at: https://sqlalche.me/e/20/bhk3)

[dosubot[bot]]

@elissa1997 Hello! I'm here to help you with any bugs, questions, or contributions you have for the WebApp. Let's tackle this issue together!

A similar issue was reported in the Dify codebase, where a 'DetachedInstanceError' occurred during workflow execution when trying to save workflow logs. This error typically happens when an object is not associated with an active session, which can occur if the session has been closed or the object was removed from the session. The recommended solution for this issue in the Dify codebase was to upgrade to version 0.15.0 or later, which includes fixes for SQLAlchemy session management issues causing the error ^[1].

In your case, since you are using version 1.0.0, you might want to check if there are any updates or patches available that address this specific error. Additionally, ensure that your session management is correctly implemented to keep objects bound to a session during operations.

To continue talking to Dosu, mention @dosu.

---

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[gaspire]

me too

[crazywoola]

me too

@gaspire Please do not open duplicated issues. https://github.com/langgenius/dify/issues/14613 We are working on fixing things right now, please be patient.