logstash啟動報錯：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}"
        }
}

啟動logstash提示如下錯誤：

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

出現錯誤原因在於：

logstash有一個叫batch_count的參數，該參數是指從隊列中一次讀取多少條數據，默認是讀取125條，可以將batch_count設置為1，關閉這個功能，即可解決上述啟動報錯！

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}"
        }
}

啟動成功，問題解決

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