logstash5.1 配置netflow 报错

[root@localhost ~]# vim /etc/logstash/conf.d/netflow.conf 

input {

  udp {

    port => 9996

    codec => netflow {

      versions => [5, 9]

    }

    type => netflow

  }

}



output {

    elasticsearch {

        index => "logstash_netflow-%{+YYYY.MM.dd}"

    }

}

[root@localhost ~]# tail -f  /var/log/logstash/logstash-plain.log

[2017-01-18T22:55:38,869][WARN ][logstash.codecs.netflow  ] Ignoring Netflow version v0

[2017-01-18T22:55:39,862][WARN ][logstash.codecs.netflow  ] Ignoring Netflow version v0

[2017-01-18T22:55:40,872][WARN ][logstash.codecs.netflow  ] Ignoring Netflow version v0

[2017-01-18T22:55:42,859][WARN ][logstash.codecs.netflow  ] Ignoring Netflow version v0

[2017-01-18T22:55:43,862][WARN ][logstash.codecs.netflow  ] Ignoring Netflow version v0

[2017-01-18T22:55:44,868][WARN ][logstash.codecs.netflow  ] Ignoring Netflow version v0

[2017-01-18T22:55:45,863][WARN ][logstash.codecs.netflow  ] Ignoring Netflow version v0