Allow Drupal default cache if the Redis is down or disconnected

Problem/Motivation

Allow Drupal default cache if Redis is down or disconnected.

If the Redis server is disconnected the site is down due to this issue.

How to configure the default Drupal cache if the Redis server is disconnected or down?

Steps to reproduce

Add the Redis configuration details in settings.php.

For testing: Provide the incorrect Redis server details or .

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes