Concating by time in brackets about fluent-plugin-concat HOT 8 CLOSED

Error [2018-10-01 15:12:31,323] (something goes here)
INFO [2018-10-01 15:12:31,323] (something gose here)

<source>
  @type tail
  path /path/to/log
  tag test.log
  <parse>
    @type none
  </parse>
</source>

<filter>
  @type parser
  key_name message
  <parse>
    @type regexp
    expression /^(?<level>(?:INFO|Error)) \[(?<timestamp>\d{4}\d{2}-\d{2}- \d{2}:\d{2}:\d{2})\](?<rest>.*)/
  </parse>
</filter>
<filter>
  @type concat
  key message
  stream_identity_key timestamp
 multiline_start_regexp ... # I can't imagine your full logs...
</filter>

<match **>
  @type stdout
</match>

<filter>
  @type concat
  key message
  multiline_start_regexp /^ERROR/
  continuous_line_regexp /^!/
</filter>

   <filter kubernetes.**>
       @type concat
       key log
       stream_identity_key container_id
       multiline_start_regexp /^\[(?<timestamp>\d{4}\d{2}-\d{2}- \d{2}:\d{2}:\d{2})\](?<rest>.*)/
       flush_interval 60 
    </filter>

<filter>
  @type concat
  key message
  multiline_start_regexp /^[A-Z]+ \[\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2},\d{3}\].*/
  continuous_line_regexp /^!/
</filter>

   multiline_start_regexp /\[\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2},\d{3}\].*/ this works thanks