The error "gem redis getaddrinfo name does not resolve" is caused by a problem with domain name resolution when attempting to connect to a Redis server. It means that the client is unable to find the IP address associated with the specified hostname, making it impossible to establish a connection with the Redis server. This can result from several factors such as an incorrect configuration, a misspelled hostname, network issues, or DNS-related problems.
To resolve this error, consider the following solutions:
Verify the Redis server's hostname: Ensure that you have entered the correct hostname for the Redis server in your client configuration. Double-check for typos and confirm that the specified hostname is accurate.
Check your local hosts file: Make sure that the Redis server's hostname is properly mapped to its IP address in your local hosts file (usually located at
/etc/hosts on Unix-based systems or
C:\Windows\System32\drivers\etc\hosts on Windows).
Test the DNS resolver: Use tools like
dig to test if the DNS resolver is able to find the IP address corresponding to the Redis server's hostname. If it fails, check your DNS settings, and ensure your system is using the right DNS servers.
Examine network connectivity: Confirm that your machine has proper network access to the Redis server by testing connectivity via tools like
traceroute. If there are any network issues, work with your network administrator or hosting provider to resolve them.
Inspect firewall settings: Ensure that your local machine's firewall and server-side security groups or firewalls are configured to allow traffic on the default Redis port (6379) or any custom port you've set for your Redis instance.