Error message

Notice: MemcachePool::getstats(): Server clios-elasticache.3xmkd8.0001.use1.cache.amazonaws.com (tcp 11211, udp 0) failed with: Connection refused (111) in require_once() (line 19 of /www/clios/clios/sites/all/modules/contrib/memcache/memcache-lock.inc).