google-fluent silently ignores structured log entries with improper time field about google-fluentd HOT 1 OPEN

I have the same problem though in my case the time field was always present, just not recognized by fluentd collector.

"time":"2021-01-21T21:19:27.935+00:00"

I managed to fix it by adding time_format %iso8601 into the configuration.

<source>
  @type tail
  <parse>
    @type json
    time_format %iso8601
  </parse>
  path xxx.log
  pos_file /var/lib/google-fluentd/pos/xxx.pos
  read_from_head true
  tag xxx
</source>

Please produce some error in the google-fluentd when the failed parsing results into ignored log lines!
(so it is visible in systemctl status google-fluentd.service and one doesn't have to spend hours debugging what is wrong).

from google-fluentd.