Additional uncaught exception thrown while handling exception.

Original

Predis\ServerException: ERR operation not permitted in Predis\Client->onResponseError() (line 282 of /var/www/drupal/sites/all/libraries/predis/lib/Predis/Client.php).

Additional

Predis\ServerException: ERR operation not permitted in Predis\Client->onResponseError() (line 282 of /var/www/drupal/sites/all/libraries/predis/lib/Predis/Client.php).