Additional uncaught exception thrown while handling exception.

Original

Predis\Connection\ConnectionException: Error while reading line from the server [tcp://cache:6379] in Predis\Connection\AbstractConnection->onConnectionError() (line 141 of /home/www/build/html/sites/all/libraries/predis/lib/Predis/Connection/AbstractConnection.php).

Additional

Predis\ServerException: BUSY Redis is busy running a script. You can only call SCRIPT KILL or SHUTDOWN NOSAVE. in Predis\Client->onResponseError() (line 282 of /home/www/build/html/sites/all/libraries/predis/lib/Predis/Client.php).