Additional uncaught exception thrown while handling exception.

Original

RedisException: read error on connection in Redis->select() (line 22 of /var/www/html/sites/all/modules/contrib/redis/lib/Redis/Client/PhpRedis.php).

Additional

RedisException: Redis server went away in Redis->select() (line 22 of /var/www/html/sites/all/modules/contrib/redis/lib/Redis/Client/PhpRedis.php).