[Bug]: request backend service endpoint v1/api/retrieval , throw sql error: peewee.InterfaceError: (0, '')

[liyongpengs]

Is there an existing issue for the same bug?

• I have checked the existing issues.

RAGFlow workspace code commit ID

a5cf6fc

RAGFlow image version

v0.15.0

Other environment information

No response

Actual behavior

ragflow backend server throw exception :

Traceback (most recent call last):
File "/ragflow/.venv/lib/python3.10/site-packages/flask/app.py", line 880, in full_dispatch_request
rv = self.dispatch_request()
File "/ragflow/.venv/lib/python3.10/site-packages/flask/app.py", line 865, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args) # type: ignore[no-any-return]
File "/ragflow/api/utils/api_utils.py", line 172, in decorated_function
return func(*_args, **_kwargs)
File "/ragflow/api/apps/api_app.py", line 809, in retrieval
objs = APIToken.query(token=token)
File "/ragflow/api/db/db_models.py", line 235, in query
return [query_record for query_record in query_records]
File "/ragflow/.venv/lib/python3.10/site-packages/peewee.py", line 7243, in iter
self.execute()
File "/ragflow/.venv/lib/python3.10/site-packages/peewee.py", line 2011, in inner
return method(self, database, *args, **kwargs)
File "/ragflow/.venv/lib/python3.10/site-packages/peewee.py", line 2082, in execute
return self._execute(database)
File "/ragflow/.venv/lib/python3.10/site-packages/peewee.py", line 2255, in _execute
cursor = database.execute(self)
File "/ragflow/.venv/lib/python3.10/site-packages/peewee.py", line 3299, in execute
return self.execute_sql(sql, params)
File "/ragflow/.venv/lib/python3.10/site-packages/peewee.py", line 3289, in execute_sql
with exception_wrapper:
File "/ragflow/.venv/lib/python3.10/site-packages/peewee.py", line 3059, in exit
reraise(new_type, new_type(exc_value, *exc_args), traceback)
File "/ragflow/.venv/lib/python3.10/site-packages/peewee.py", line 192, in reraise
raise value.with_traceback(tb)
File "/ragflow/.venv/lib/python3.10/site-packages/peewee.py", line 3291, in execute_sql
cursor.execute(sql, params or ())
File "/ragflow/.venv/lib/python3.10/site-packages/pymysql/cursors.py", line 153, in execute
result = self._query(query)
File "/ragflow/.venv/lib/python3.10/site-packages/pymysql/cursors.py", line 322, in _query
conn.query(q)
File "/ragflow/.venv/lib/python3.10/site-packages/pymysql/connections.py", line 562, in query
self._execute_command(COMMAND.COM_QUERY, sql)
File "/ragflow/.venv/lib/python3.10/site-packages/pymysql/connections.py", line 843, in _execute_command
raise err.InterfaceError(0, "")
peewee.InterfaceError: (0, '')

Expected behavior

No response

Steps to reproduce

First, I deploying multiple ragflow server instances under the same endpoint by gunicorn.
After some time, I make requests to the backend service: v1/api/retrieval.
Then, I get a response {'code': 100, 'data': '', 'message': '0'} in front , and an exception in backend service.

Additional information

No response