Additional uncaught exception thrown while handling exception.

Original

Predis\Connection\ConnectionException: Connection refused [tcp://127.0.0.1:6379] in Predis\Connection\AbstractConnection->onConnectionError() (line 141 of /var/www/drupal/sites/all/libraries/predis/lib/Predis/Connection/AbstractConnection.php).

Additional

Predis\ServerException: LOADING Redis is loading the dataset in memory in Predis\Client->onResponseError() (line 282 of /var/www/drupal/sites/all/libraries/predis/lib/Predis/Client.php).