The error 'memcached error not found' usually occurs when the Memcached service is not running or cannot be found on the specified host and port. It can also occur if the Memcached client library is not installed or if there is a mismatch between the version of the client library and the server. Another possible cause of this error is incorrect configuration settings in the application's code or the Memcached configuration file.
To resolve 'memcached error not found', first, check if the Memcached service is running by using the 'ps aux | grep memcached' command on the server. If it is not running, start it with the 'service memcached start' command. If the service is running, ensure that the correct host and port numbers are specified in the application's code or configuration file.
If the issue persists, check if the Memcached client library is installed and up-to-date on the server. Install or update it as necessary. Also, ensure that the version of the client library matches the version of the Memcached server.
In case none of these solutions work, try restarting the Memcached service or the server itself. Additionally, it may be helpful to review the system logs for any related error messages. Finally, consider seeking assistance from the Memcached community or a professional consultant experienced in Memcached troubleshooting.