logstash启动报错：Redis connection problem {:exception=>#, :level=>:warn}

logstash配置文件信息如下：

input  {
        redis {
                host => "192.168.116.133"
                port => "6379"
                db => "6"
                data_type => "list"
                key => "apache-accesslog"
        }
}

filter {
        grok {
                match => { "message" => "%{COMBINEDAPACHELOG}" }
        }
}

output {
        elasticsearch {
                hosts => ["192.168.116.131:9200"]
                index => "apache-accesslog-%{+YYYY.MM.dd}"
        }
}

启动logstash提示如下错误：

Redis connection problem {:exception=>#<Redis::CommandError: ERR unknown command 'script'>, :level=>:warn}

出现错误原因在于：

logstash有一个叫batch_count的参数，该参数是指从队列中一次读取多少条数据，默认是读取125条，可以将batch_count设置为1，关闭这个功能，即可解决上述启动报错！

修改logstash配置文件

input  {
        redis {
                host => "192.168.116.133"
                port => "6379"
                db => "6"
                data_type => "list"
                batch_count => "1"
                key => "apache-accesslog"
        }
}

filter {
        grok {
                match => { "message" => "%{COMBINEDAPACHELOG}" }
        }
}

output {
        elasticsearch {
                hosts => ["192.168.116.131:9200"]
                index => "apache-accesslog-%{+YYYY.MM.dd}"
        }
}

启动成功，问题解决

[root@www conf.d]# /opt/logstash/bin/logstash -f indexer.conf 
Settings: Default pipeline workers: 1
Pipeline main started