Additional uncaught exception thrown while handling exception.

Original

RedisException: OOM command not allowed under OOM prevention. in Redis->exec() (line 103 of /var/www/html/sites/all/modules/contrib/redis/lib/Redis/Cache/PhpRedis.php).

Additional

RedisException: OOM command not allowed under OOM prevention. in Redis->setex() (line 67 of /var/www/html/sites/all/modules/contrib/redis/lib/Redis/Lock/PhpRedis.php).