Additional uncaught exception thrown while handling exception.

Original

RedisException: read error on connection in Redis->auth() (line 18 of /var/www/htdocs/www-it-nrw-de.prod-drupal/docroot/sites/all/modules/contrib/redis/lib/Redis/Client/PhpRedis.php).

Additional

RedisException: read error on connection in Redis->auth() (line 18 of /var/www/htdocs/www-it-nrw-de.prod-drupal/docroot/sites/all/modules/contrib/redis/lib/Redis/Client/PhpRedis.php).