rpush with set_keepalive error

-- put it into the connection pool of size 512,
-- with 0 idle timeout
local ok, err = red:set_keepalive(0, 512)
if not ok then
	ngx.say("failed to set keepalive redis: ", err)
	return
end
bloop with set_keepalive

on mac czoffice
tonumber cacel because the wrong number type

1\score of redis zsets
2\timestamp > tscres(dip version)
3\lpop result data type is string, if NOT break;
slave read bloop with set_keepalive