django.db.utils.DatabaseError: DatabaseWrapper objects created in a thread can only be used in that same thread

[malaohu]

最近再虚拟机上跑一个老项目 Python Django代码，突然报错了~

  File "./manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 353, in execute_from_command_line
    elif self.argv[1:] in (['--help'], ['-h']):
  File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 345, in execute
    elif len(options.args) < 1:
  File "/usr/local/lib/python2.7/site-packages/django/core/management/base.py", line 360, in run_from_argv
    )
  File "/usr/local/lib/python2.7/site-packages/django/db/utils.py", line 235, in close_all
    
  File "/usr/local/lib/python2.7/site-packages/django/db/backends/base/base.py", line 263, in close
    # A successful commit means that the database connection works.
  File "/usr/local/lib/python2.7/site-packages/django/db/backends/base/base.py", line 523, in validate_thread_sharing
    if self.close_at is not None and time.time() >= self.close_at:
django.db.utils.DatabaseError: DatabaseWrapper objects created in a thread can only be used in that same thread. The object with alias 'default' was created in thread id 140018405640000 and this is thread id 140017984312336.
Exception KeyError: KeyError(140017984312336,) in <module 'threading' from '/usr/local/lib/python2.7/threading.pyc'> ignored

经过一番搜索，发现问题所在了！

第一，我将Python 2 版本升级到 2.7.18
第二，Django版本 1.9.6

运行Django项目出现错误

卸载原Django库，新安装 最新版本的Django(1.11.29)即可