Additional uncaught exception thrown while handling exception.

Original

Predis\Connection\ConnectionException: Error while reading line from the server. [tcp://127.0.0.1:6379] in Predis\Connection\AbstractConnection->onConnectionError() (line 155 of /var/www/drupal7/sites/all/libraries/predis/src/Connection/AbstractConnection.php).

Additional

Predis\Connection\ConnectionException: Connection refused [tcp://127.0.0.1:6379] in Predis\Connection\AbstractConnection->onConnectionError() (line 155 of /var/www/drupal7/sites/all/libraries/predis/src/Connection/AbstractConnection.php).