Additional uncaught exception thrown while handling exception.

Original

Error: Call to undefined function module_list() in bootstrap_invoke_all() (line 1343 of /datadg/www/drupal/ps/includes/bootstrap.inc).

Additional

RedisException: Redis server went away in Redis->setOption() (line 28 of /datadg/www/drupal/ps/sites/all/modules/redis/lib/Redis/Client/PhpRedis.php).