👀 Views: 286 💬 Answers: 1 📅 Created: 2025-06-10

mysql ubuntu systemd bash

I've been struggling with this for a few days now and could really use some help. I'm optimizing some code but I'm running Ubuntu 22.04 and recently upgraded MySQL from version 5.7 to 8.0. Now, the MySQL service won't start, and the logs indicate an behavior: `InnoDB: Unable to lock ./ibdata1`. I suspect that there might be a file permission scenario or a leftover lock from the previous version, but I'm not entirely sure how to resolve it. I've already tried the following steps: 1. Checked the ownership of the MySQL data directory: ```bash ls -l /var/lib/mysql/ ``` The output shows that the directory and files are owned by `mysql:mysql`, which seems correct. 2. Attempted to remove any existing `.pid` or `.lock` files: ```bash sudo rm /var/run/mysqld/mysqld.pid sudo rm /var/run/mysqld/mysqld.sock.lock ``` 3. Ensured that there are no other MySQL processes running: ```bash ps aux | grep mysql ``` The output was clean; no other processes were found. 4. I also ran `myisamchk` on the MySQL tables, but it didn't return any errors. Despite these efforts, when I execute `sudo systemctl start mysql`, it still fails with the same lock behavior. I checked the MySQL behavior log located at `/var/log/mysql/behavior.log`, and it confirms the lock scenario with the following line: `InnoDB: Operating system behavior number 11 in a file operation`. I would appreciate any guidance on what might be causing this scenario or any additional troubleshooting steps I should take. Thank you! I'm working in a Linux environment. I'm open to any suggestions. This is part of a larger service I'm building. I'm working on a microservice that needs to handle this.