Error: memcached.service failed with result 'exit-code'

What's Causing This Error

The error message "memcached.service failed with result 'exit-code'" indicates that the Memcached service failed to start or stop properly. There can be various reasons behind this error, including configuration issues, permission problems, or system errors.

Common Causes:

1. Configuration Issues: Errors in the memcached.conf file can prevent the service from starting. Look for syntax errors or incorrect parameters.
2. Permission Problems: The user running Memcached may not have sufficient privileges. Check file and directory permissions.
3. System Errors: Low disk space or network connectivity issues can also cause the service to fail. Ensure the system has adequate resources.

Solution - Here's How To Resolve It

To resolve the "memcached.service failed with result 'exit-code'" error, follow these detailed steps:

1. Check Configuration File:

   • Open the memcached.conf file, usually located at /etc/memcached.conf or /etc/sysconfig/memcached.
   • Look for any syntax errors, missing parameters, or incorrect settings.
   • Example of a correct line: -m 64 (sets memory to 64MB).

2. Validate Daemon Parameters:

   • Ensure the daemon is running with correct parameters.
   • Run ps aux | grep memcached to see the current parameters.
   • Compare with expected values from the configuration file.

3. Verify Permissions:

   • Check the ownership and permissions of the Memcached directories and files.
   • For example, ensure the cache directory has memcache:memcache ownership and proper read/write permissions.
   • Use chown memcache:memcache /path/to/directory and chmod 755 /path/to/directory as needed.

4. Check System Health:

   • Verify disk space using df -h. Free up space if necessary.
   • Check network connectivity with ping or traceroute commands if Memcached is distributed.

5. Restart Memcached Service:

   • Restart the service using sudo systemctl restart memcached.
   • Check the status with sudo systemctl status memcached to ensure it’s running without errors.

If you still face issues, consider reviewing the system logs for more specific error messages:

• Use journalctl -xe for detailed logging information.
• Check /var/log/memcached.log if available.

For persistent problems, consult the Memcached community or seek advice from a professional.