The Cache filter cannot cope with the Redis server closing the connection

If

• Redis is used as storage for the cache,
• Redis has been configured with an idle timeout, and
• a client is idle for a duration longer than the Redis idle timeout,
  thereafter all cache activity performed on behalf of that client will fail with error messages like

  2022-02-16 11:25:43 error : [storage_redis] Failed to read reply in the context of MULTI: general error, Server closed the connection

  2022-02-16 11:25:43 error : [storage_redis] Failed when reading response to MULTI: no error, Server closed the connection

  until the end of the session.