Why is My MySQL Server Quitting Without Updating the PID File?

MySQL Server Startup Error: 'The server quit without updating PID file'

Troubleshooting the MySQL server startup error "The server quit without updating PID file" on Mac OS X v10.6 (Snow Leopard) can be challenging. Here's a comprehensive guide to assist you:

Investigating the Log File:

Begin by locating the log file with the ".err" suffix. This file typically contains detailed error messages that can shed light on the root cause. The log file can be found in:

/usr/local/var/mysql/your_computer_name.local.err

Permission Issues:

A common cause of this error is incorrect file permissions. Follow these steps to check and correct permissions:

1. Check for Running MySQL Instances:

Ensure that no other MySQL instance is currently running. Use the following command to check:

ps -ef | grep mysql

If an instance is running, stop it or kill the process using:

kill -9 PID

where PID is the process ID obtained from the previous command.

2. Check Ownership of MySQL Directory:

Use the following command to check the ownership of the /usr/local/var/mysql/ directory:

ls -laF /usr/local/var/mysql/

If the owner is root, change it to mysql or your user account:

sudo chown -R mysql /usr/local/var/mysql/

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