Django 迁移失败，(2013, 'Lost connection to MySQL server at \'reading initial communication packet\')

Question

公司工作购买了NameCheap下的域名（无Root权限）

我现在只需要设置数据库和网页就可以工作了

我公司系统使用：

Apache 版本：2.4.38

MySQL 版本：10.1.38-MariaDB-cll-lve

架构：x86_64

操作系统：Linux

Python：3.7

Django：2.1.7

但是当我运行python manage.py migrate

我遇到了这个错误：

Traceback (most recent call last):
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
    self.connect()
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/db/backends/base/base.py", line 194, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/db/backends/mysql/base.py", line 227, in get_new_connection
    return Database.connect(**conn_params)
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/MySQLdb/__init__.py", line 84, in Connect
    return Connection(*args, **kwargs)
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/MySQLdb/connections.py", line 164, in __init__
    super(Connection, self).__init__(*args, **kwargs2)
MySQLdb._exceptions.OperationalError: (2013, 'Lost connection to MySQL server at \'reading initial communication packet\', system error: 2 "No such file or directory"')

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

Traceback (most recent call last):
  File "manage.py", line 15, in <module>
    execute_from_command_line(sys.argv)
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/core/management/__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/core/management/base.py", line 316, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/core/management/base.py", line 350, in execute
    self.check()
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/core/management/base.py", line 379, in check
    include_deployment_checks=include_deployment_checks,
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/core/management/commands/migrate.py", line 59, in _run_checks
    issues = run_checks(tags=[Tags.database])
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/core/checks/registry.py", line 71, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/core/checks/database.py", line 10, in check_database_backends
    issues.extend(conn.validation.check(**kwargs))
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/db/backends/mysql/validation.py", line 9, in check
    issues.extend(self._check_sql_mode(**kwargs))
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/db/backends/mysql/validation.py", line 13, in _check_sql_mode
    with self.connection.cursor() as cursor:
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/db/backends/base/base.py", line 255, in cursor
    return self._cursor()
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/db/backends/base/base.py", line 232, in _cursor
    self.ensure_connection()
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
    self.connect()
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/db/utils.py", line 89, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
    self.connect()
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/db/backends/base/base.py", line 194, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/django/db/backends/mysql/base.py", line 227, in get_new_connection
    return Database.connect(**conn_params)
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/MySQLdb/__init__.py", line 84, in Connect
    return Connection(*args, **kwargs)
  File "/home/letsilap/virtualenv/IOT/3.7/lib/python3.7/site-packages/MySQLdb/connections.py", line 164, in __init__
    super(Connection, self).__init__(*args, **kwargs2)
django.db.utils.OperationalError: (2013, 'Lost connection to MySQL server at \'reading initial communication packet\', system error: 2 "No such file or directory"')

我在 StackOverflow 上做了一些搜索：

Error during Django "Running migrations": django.db.utils.OperationalError: (2013, 'Lost connection to MySQL server during query')

Trouble closing and reopening MySQL connection after catching/handling django.db.utils.OperationalError (2013, Lost connection to server)

但这不是很有帮助

对该主题的进一步挖掘使我相信 MYSQL 数据库拒绝访问我的 Django 应用程序。

我可以试试这个理论，因为我根本无法访问 MYSQL 设置

总结一下；我需要在 django 应用程序上迁移，但运行命令时出错。

请帮忙，如果你能帮助我，我真的很感激。

Answer 1

我是编码新手。也许你犯了一个初学者的错误？

单词不匹配？包括，大写下划线？

我不知道我是不是在帮忙。

只是建议

Answer 2

这可能是由于 MYSQL DB 有时间造成的。

您可以通过进入 MySQL Workbench 并设置长 DMSB 来纠正此问题。

这里是响应此错误的文章链接： https://anothercoffee.net/fix-error-code-2013-lost-connection-mysql-server-query/

关于这个问题的mysql官方文档； https://dev.mysql.com/doc/refman/5.7/en/error-lost-connection.html

希望有帮助