filebeat设置多行合并不生效

filebeat设置多行合并之后，kibana日志未合并，请查看附件配置，日志格式和kabana的日志
 
filebeat.inputs:
- type: log
  enabled: true
  paths:
    - /data/logs/tomcat/platform/default.log
  fields:
    source: platform
  #exclude_lines: ["^$"]

- type: log
  enabled: true
  paths:
    - /data/logs/tomcat/sales/default.log
  fields:
    source: sales
  #exclude_lines: ["^$"]

- type: log
  enabled: true
  paths:
    - /data/logs/tomcat/report/default.log
  fields:
    source: report
  #exclude_lines: ["^$"]

filebeat.config.modules:
  path: ${path.config}/modules.d/*.yml
  reload.enabled: true

multiline.pattern: '^[0-9]{4}-[0-9]{2}-[0-9]{2}'
multiline.negate: true
multiline.match: after