Database is locked

[chust4]

At seemingly random times I get this error.
The script generally works, adds torrents to qbittorent, but most entries often do not appear in the seedcross list

Internal Server Error: /crseed/processlog

Traceback (most recent call last):

  File "/usr/local/lib/python3.11/site-packages/django/db/backends/utils.py", line 84, in _execute

    return self.cursor.execute(sql, params)

           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "/usr/local/lib/python3.11/site-packages/django/db/backends/sqlite3/base.py", line 423, in execute

    return Database.Cursor.execute(self, query, params)

           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

sqlite3.OperationalError: database is locked

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

Traceback (most recent call last):

  File "/usr/local/lib/python3.11/site-packages/django/core/handlers/exception.py", line 47, in inner

    response = get_response(request)

               ^^^^^^^^^^^^^^^^^^^^^

  File "/usr/local/lib/python3.11/site-packages/django/core/handlers/base.py", line 181, in _get_response

    response = wrapped_callback(request, *callback_args, **callback_kwargs)

               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "/usr/local/lib/python3.11/site-packages/django/contrib/auth/decorators.py", line 21, in _wrapped_view

    return view_func(request, *args, **kwargs)

           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "/code/seedcross/crseed/views.py", line 333, in ajaxRefreshProcessLog

    log.save()

  File "/usr/local/lib/python3.11/site-packages/django/db/models/base.py", line 739, in save

    self.save_base(using=using, force_insert=force_insert,

  File "/usr/local/lib/python3.11/site-packages/django/db/models/base.py", line 776, in save_base

    updated = self._save_table(

              ^^^^^^^^^^^^^^^^^

  File "/usr/local/lib/python3.11/site-packages/django/db/models/base.py", line 858, in _save_table

    updated = self._do_update(base_qs, using, pk_val, values, update_fields,

              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "/usr/local/lib/python3.11/site-packages/django/db/models/base.py", line 912, in _do_update

    return filtered._update(values) > 0

           ^^^^^^^^^^^^^^^^^^^^^^^^

  File "/usr/local/lib/python3.11/site-packages/django/db/models/query.py", line 802, in _update

    return query.get_compiler(self.db).execute_sql(CURSOR)

           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "/usr/local/lib/python3.11/site-packages/django/db/models/sql/compiler.py", line 1559, in execute_sql

    cursor = super().execute_sql(result_type)

             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "/usr/local/lib/python3.11/site-packages/django/db/models/sql/compiler.py", line 1175, in execute_sql

    cursor.execute(sql, params)

  File "/usr/local/lib/python3.11/site-packages/django/db/backends/utils.py", line 98, in execute

    return super().execute(sql, params)

           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "/usr/local/lib/python3.11/site-packages/django/db/backends/utils.py", line 66, in execute

    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)

           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "/usr/local/lib/python3.11/site-packages/django/db/backends/utils.py", line 75, in _execute_with_wrappers

    return executor(sql, params, many, context)

           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "/usr/local/lib/python3.11/site-packages/django/db/backends/utils.py", line 79, in _execute

    with self.db.wrap_database_errors:

  File "/usr/local/lib/python3.11/site-packages/django/db/utils.py", line 90, in __exit__

    raise dj_exc_value.with_traceback(traceback) from exc_value

  File "/usr/local/lib/python3.11/site-packages/django/db/backends/utils.py", line 84, in _execute

    return self.cursor.execute(sql, params)

           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "/usr/local/lib/python3.11/site-packages/django/db/backends/sqlite3/base.py", line 423, in execute

    return Database.Cursor.execute(self, query, params)

           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

django.db.utils.OperationalError: database is locked

"GET /crseed/processlog HTTP/1.1" 500 149378

[ccf-2012]

It's SQLite issue, when you have too many torrents, the 'locked' issue may occur.
if you run with source code, set the sqlite db mode to 'wal' may change a bit.

sqlite3 db.sqlite3 'PRAGMA journal_mode=wal;'
cd ..````