filebeat错误提示Exiting: Can only start an input when all related states are finished:

环境是Centos 6，filebeat版本是6.4.2-1.x86_64。
 
/etc/filebeat/filebeat.yml 

filebeat.config.inputs:

  enabled: true

  path: configs/*.yml



filebeat.config.modules:

  enabled: true

  path: /etc/filebeat/modules.d/*.yml



filebeat.modules:

- module: system



output.redis:

    enabled: true

    hosts: ["192.168.1.1:6379"]

    port: 6379

    datatype: list

    db: 0

    key: aliyun-121

/etc/filebeat/configs/systemlog.yml 

filebeat.inputs:

- module: system

  syslog:

    enabled: true

    var.paths: ["/var/log/messages"]

  auth:

    enabled: true

    var.paths: ["/var/log/secure"]

/etc/filebeat/modules.d目录下把system.yml.disabled的文件名改为system.yml。
 
/etc/init.d/filebeat start，再看/var/log/filebeat/filebeat文件里的日志：

2018-11-04T12:29:36.986+0800    INFO    instance/beat.go:373    filebeat stopped.

2018-11-04T12:29:36.989+0800    ERROR   instance/beat.go:743    Exiting: Can only start an input when all related states are finished: {Id:210097-64513 Finished:false Fileinfo:0xc4201a52b0 Source:/var/log/secure Offset:2624 Timestamp:2018-11-04 12:29:36.954191668 +0800 CST m=+0.056768775 TTL:-1ns Type:log Meta:map[] FileStateOS:210097-64513}

Exiting: Can only start an input when all related states are finished: {Id:210097-64513 Finished:false Fileinfo:0xc4201a52b0 Source:/var/log/secure Offset:2624 Timestamp:2018-11-04 12:29:36.954191668 +0800 CST m=+0.056768775 TTL:-1ns Type:log Meta:map[] FileStateOS:210097-64513}

再查看filebeat服务的状态，看到这个服务没有启动。
 
现在找到的解决方案是把/etc/filebeat/modules.d目录下把system.yml的文件名改为system.yml.disabled，再启动filebeat就成功了。但是在centos 7下把文件名改为system.yml以后可以启动filebeat。
 
请教各位以上操作哪里有问题？