[logstash] {:message=>"Failed to send event to redis"

software version
elasticsearch-0.19.11-2.el6.x86_64.rpm
logstash-1.1.5-1.el6.x86_64.rpm
redis-2.4.6-rc2.x86_64.rpm

use
redis-2.4.7-1.x86_64.rpm
avoid this problems.

{:message=>"Failed to send event to redis"