Django 数据库连接失效 导致的异常

[tang51678]

self._result_cache = list(self._iterable_class(self))
File "/usr/local/lib/python3.10/site-packages/django/db/models/query.py", line 91, in iter
results = compiler.execute_sql(
File "/usr/local/lib/python3.10/site-packages/django/db/models/sql/compiler.py", line 1621, in execute_sql
cursor = self.connection.cursor()
File "/usr/local/lib/python3.10/site-packages/django/utils/asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 320, in cursor
return self._cursor()
File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 297, in _cursor
with self.wrap_database_errors:
File "/usr/local/lib/python3.10/site-packages/django/db/utils.py", line 91, in exit
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 298, in _cursor
return self._prepare_cursor(self.create_cursor(name))
File "/usr/local/lib/python3.10/site-packages/django/utils/asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "/usr/local/lib/python3.10/site-packages/django/db/backends/postgresql/base.py", line 429, in create_cursor
cursor = self.connection.cursor()
django.db.utils.InterfaceError: connection already closed
[2026-03-02 08:41:20] [ERROR] [apps.engine.scheduler:107] 定时扫描任务执行失败: connection already closed
Traceback (most recent call last):
File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 298, in _cursor
return self._prepare_cursor(self.create_cursor(name))
File "/usr/local/lib/python3.10/site-packages/django/utils/asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "/usr/local/lib/python3.10/site-packages/django/db/backends/postgresql/base.py", line 429, in create_cursor
cursor = self.connection.cursor()
psycopg2.InterfaceError: connection already closed

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/app/backend/apps/engine/scheduler.py", line 101, in _trigger_scheduled_scans
triggered_count = service.trigger_due_scans()
File "/app/backend/apps/scan/services/scheduled_scan_service.py", line 347, in trigger_due_scans
for scheduled_scan in due_scans:
File "/usr/local/lib/python3.10/site-packages/django/db/models/query.py", line 384, in iter
self._fetch_all()
File "/usr/local/lib/python3.10/site-packages/django/db/models/query.py", line 1949, in _fetch_all
self._result_cache = list(self._iterable_class(self))
File "/usr/local/lib/python3.10/site-packages/django/db/models/query.py", line 91, in iter
results = compiler.execute_sql(
File "/usr/local/lib/python3.10/site-packages/django/db/models/sql/compiler.py", line 1621, in execute_sql
cursor = self.connection.cursor()
File "/usr/local/lib/python3.10/site-packages/django/utils/asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 320, in cursor
return self._cursor()
File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 297, in _cursor
with self.wrap_database_errors:
File "/usr/local/lib/python3.10/site-packages/django/db/utils.py", line 91, in exit
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 298, in _cursor
return self._prepare_cursor(self.create_cursor(name))
File "/usr/local/lib/python3.10/site-packages/django/utils/asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "/usr/local/lib/python3.10/site-packages/django/db/backends/postgresql/base.py", line 429, in create_cursor
cursor = self.connection.cursor()
django.db.utils.InterfaceError: connection already closed
[2026-03-02 08:42:20] [ERROR] [apps.engine.scheduler:107] 定时扫描任务执行失败: connection already closed
Traceback (most recent call last):
File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 298, in _cursor
return self._prepare_cursor(self.create_cursor(name))
File "/usr/local/lib/python3.10/site-packages/django/utils/asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "/usr/local/lib/python3.10/site-packages/django/db/backends/postgresql/base.py", line 429, in create_cursor
cursor = self.connection.cursor()
psycopg2.InterfaceError: connection already closed