Couldn't connect to MySQL. Check that the service is running, then try again.

Question

Same issue as I have had a few times, with no resolution. I am getting the message "Couldn't connect to MySQL. Check that the service is running, then try again." on Railway when I click on the mysql service. Locally, if I try to connect to the database (with the same code that has worked for months), i get

```
line 826, in _read_bytes

raise err.OperationalError(

sqlalchemy.exc.OperationalError: (pymysql.err.OperationalError) (2013, 'Lost connection to MySQL server during query')

(Background on this error at: https://sqlalche.me/e/20/e3q8)

```

I have already tried redeploying the source image. It deploys succesfully but no change in the above.

```

Mounting volume on: /var/lib/containers/railwayapp/bind-mounts/4fa2cecb-0fe6-4cc4-b8fd-e2420f1dd1e6/vol_niknzpuklvzqm62c

Starting Container

2026-11-12T21:15:24.576642Z 0 [System] [MY-015603] [Server] MySQL Server has access to 402873303040 bytes of physical memory.

2026-11-12T21:15:24.587721Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.

2026-11-12T21:15:27.728915Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.

2026-11-12 21:15:23+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 9.7.4-1.el9 started.

2026-11-12 21:15:23+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql'

2026-11-12 21:15:23+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 9.7.4-1.el9 started.

'/var/lib/mysql/mysql.sock' -> '/var/run/mysqld/mysqld.sock'

2026-11-12T21:15:24.461495Z 0 [System] [MY-015015] [Server] MySQL Server - start.

2026-11-12T21:15:24.576192Z 0 [Warning] [MY-015655] [Server] Server ignores the discovered container restrictions as --container_aware is OFF

2026-11-12T21:15:24.576234Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 9.7.4) starting as process 1

2026-11-12T21:15:24.576238Z 0 [System] [MY-015150] [Server] Server version with update: '9.7.4.0'

2026-11-12T21:15:24.576259Z 0 [System] [MY-015603] [Server] MySQL Server has access to 48 logical CPUs.

2026-11-12T21:15:28.843642Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.

2026-11-12T21:15:28.843698Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.

2026-11-12T21:15:28.854193Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location '/var/run/mysqld' in the path is accessible to all OS users. Consider choosing a different directory.

2026-11-12T21:15:29.104738Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock

2026-11-12T21:15:29.104771Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '9.7.4'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  MySQL Community Server - GPL.

```