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

Posted 2023-02-24

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

【英文标题】：Django migartion fail, (2013, 'Lost connection to MySQL server at \'reading initial communication packet\')Django 迁移失败，(2013, 'Lost connection to MySQL server at \'reading initial communication packet\')

【发布时间】：2019-08-31 11:37:48

【问题描述】：

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 *** 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。

【参考方案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

【参考方案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