在Jupyterhub中获取错误“ sqlalchemy.exc.DatabaseError：sqlite3.DatabaseError文件不是数据库”

编程问答 2022-08-17

问题描述

在这一步，我收到错误消息，

[I 2020-08-15 04:28:23.613 JupyterHub app:1349] Loading cookie_secret from /path/to/jupyterhub_cookie_secret

最初，这工作正常，我不确定是否有人对该文件进行了任何更改或对配置进行了更改。我尝试查找此特定错误，但是找不到任何有用的东西，尤其是在Jupyterhub的上下文中。

错误日志：

    Traceback (most recent call last):
  File "/usr/local/lib/python3.6/dist-packages/jupyterhub/app.py",line 2715,in launch_instance_async
    await self.initialize(argv)
  File "/usr/local/lib/python3.6/dist-packages/jupyterhub/app.py",line 2282,in initialize
    self.init_db()
  File "/usr/local/lib/python3.6/dist-packages/jupyterhub/app.py",line 1522,in init_db
    self.db_url,reset=self.reset_db,echo=self.debug_db,**self.db_kwargs
  File "/usr/local/lib/python3.6/dist-packages/jupyterhub/orm.py",line 814,in new_session_factory
    check_db_revision(engine)
  File "/usr/local/lib/python3.6/dist-packages/jupyterhub/orm.py",line 705,in check_db_revision
    current_table_names = set(engine.table_names())
  File "/usr/local/lib/python3.6/dist-packages/sqlalchemy/engine/base.py",line 2266,in table_names
    return self.dialect.get_table_names(conn,schema)
  File "<string>",line 2,in get_table_names
  File "/usr/local/lib/python3.6/dist-packages/sqlalchemy/engine/reflection.py",line 44,in cache
    return fn(self,con,*args,**kw)
  File "/usr/local/lib/python3.6/dist-packages/sqlalchemy/dialects/sqlite/base.py",line 1599,in get_table_names
    rs = connection.execute(s)
  File "/usr/local/lib/python3.6/dist-packages/sqlalchemy/engine/base.py",line 976,in execute
    return self._execute_text(object_,multiparams,params)
  File "/usr/local/lib/python3.6/dist-packages/sqlalchemy/engine/base.py",line 1151,in _execute_text
    parameters,File "/usr/local/lib/python3.6/dist-packages/sqlalchemy/engine/base.py",line 1288,in _execute_context
    e,statement,parameters,cursor,context
  File "/usr/local/lib/python3.6/dist-packages/sqlalchemy/engine/base.py",line 1482,in _handle_dbapi_exception
    sqlalchemy_exception,with_traceback=exc_info[2],from_=e
  File "/usr/local/lib/python3.6/dist-packages/sqlalchemy/util/compat.py",line 178,in raise_
    raise exception
  File "/usr/local/lib/python3.6/dist-packages/sqlalchemy/engine/base.py",line 1248,in _execute_context
    cursor,context
  File "/usr/local/lib/python3.6/dist-packages/sqlalchemy/engine/default.py",line 588,in do_execute
    cursor.execute(statement,parameters)
sqlalchemy.exc.DatabaseError: (sqlite3.DatabaseError) file is not a database
[sql: SELECT name FROM sqlite_master WHERE type='table' ORDER BY name]
(Background on this error at: http://sqlalche.me/e/4xp6)

解决方法

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