Verifique que Redis se esté ejecutando
$ redis-cli ping
PONG
Kirk-Patrick Brown
$ redis-cli ping
PONG
$ redis-cli -h redis15.localnet.org -p 6390 ping
PONG
{ echo -e '*1\r\n$4\r\nPING\r\n'; sleep 1; } | netcat redis.host.com 6379