Memcached is a high-performance, distributed memory object caching system. It is used to speed up dynamic web applications by alleviating database load. Memcached stores data in memory for quick retrieval, making it an essential tool for applications that require fast data access.
When using Memcached, you might encounter the error message: CLIENT_ERROR invalid connection. This error indicates that there is an issue with the connection between the client and the Memcached server.
Typically, this error is observed when attempting to connect to the Memcached server. The client application fails to establish a valid connection, resulting in the error message being displayed.
The CLIENT_ERROR invalid connection error suggests that the connection parameters provided to the Memcached client are incorrect or the server is unreachable. This could be due to incorrect server address, port, or network issues.
To resolve the CLIENT_ERROR invalid connection error, follow these steps:
Ensure that the server address and port number specified in your client configuration are correct. The default port for Memcached is 11211. Double-check the configuration files or environment variables where these parameters are set.
Use network tools like ping or telnet to verify that the Memcached server is reachable from the client machine. For example:
ping
telnet 11211
If the server is unreachable, check your network configuration and ensure there are no connectivity issues.
Ensure that your firewall settings allow traffic on the Memcached port (default 11211). You may need to add a rule to allow incoming connections to this port.
Verify that the Memcached server is running. You can use the following command to check the status:
systemctl status memcached
If the server is not running, start it using:
systemctl start memcached
For more information on configuring and troubleshooting Memcached, consider visiting the following resources:
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