Description of problem:
Forword audit logs to kafka report the following errors:

2020-07-15 12:42:06 +0000 [warn]: emit transaction failed: error_class=ArgumentError error="time must be a Fluent::EventTime (or Integer): Float" location="/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/output.rb:825:in `metadata'" tag="linux-audit.log". 



How reproducible:
 Always

Steps to Reproduce:
1. Forward audit logs to kafka 

apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: instance
  namespace: openshift-logging
spec:
  outputs:
    - name: kafka
      url: tls://my-cluster-kafka-bootstrap.amq.svc.cluster.local:9092/topic-logging-audit
      type: kafka
  pipelines:
    - name: test-audit
      inputRefs:
      - audit
      outputRefs:
      - kafka

2. Check the fluentd pod logs
   oc logs fluentd-b7ndc

Actual results:

Setting each total_size_limit for 1 buffers to 19242572390 bytes
Setting queued_chunks_limit_size for each buffer to 2293
2020-07-15 12:42:06 +0000 [warn]: emit transaction failed: error_class=ArgumentError error="time must be a Fluent::EventTime (or Integer): Float" location="/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/output.rb:825:in `metadata'" tag="linux-audit.log"
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/output.rb:825:in `metadata'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/output.rb:973:in `block in handle_stream_with_standard_format'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/event.rb:196:in `block in each'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/event.rb:195:in `each'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/event.rb:195:in `each'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/output.rb:972:in `handle_stream_with_standard_format'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/output.rb:882:in `execute_chunking'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/output.rb:808:in `emit_buffered'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/event_router.rb:97:in `emit_stream'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/out_relabel.rb:29:in `process'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/output.rb:797:in `emit_sync'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/out_copy.rb:61:in `block in process'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/out_copy.rb:59:in `each'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/out_copy.rb:59:in `each_with_index'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/out_copy.rb:59:in `process'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/multi_output.rb:148:in `emit_sync'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/event_router.rb:97:in `emit_stream'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/out_relabel.rb:29:in `process'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/output.rb:797:in `emit_sync'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/out_copy.rb:61:in `block in process'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/out_copy.rb:59:in `each'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/out_copy.rb:59:in `each_with_index'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/out_copy.rb:59:in `process'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/multi_output.rb:148:in `emit_sync'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/event_router.rb:97:in `emit_stream'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/out_relabel.rb:29:in `process'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/output.rb:797:in `emit_sync'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/event_router.rb:160:in `emit_events'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/event_router.rb:97:in `emit_stream'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:451:in `receive_lines'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:569:in `wrap_receive_lines'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:803:in `block in handle_notify'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:847:in `with_io'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:783:in `handle_notify'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:779:in `block in on_notify'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:779:in `synchronize'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:779:in `on_notify'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:599:in `on_notify'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:573:in `attach'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:322:in `setup_watcher'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:353:in `block in start_watchers'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:339:in `each'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:339:in `start_watchers'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:316:in `refresh_watchers'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/in_tail.rb:226:in `start'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/root_agent.rb:200:in `block in start'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/root_agent.rb:189:in `block (2 levels) in lifecycle'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/root_agent.rb:188:in `each'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/root_agent.rb:188:in `block in lifecycle'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/root_agent.rb:175:in `each'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/root_agent.rb:175:in `lifecycle'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/root_agent.rb:199:in `start'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/engine.rb:248:in `start'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/engine.rb:147:in `run'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/supervisor.rb:592:in `block in run_worker'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/supervisor.rb:823:in `main_process'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/supervisor.rb:586:in `run_worker'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/command/fluentd.rb:338:in `<top (required)>'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:59:in `require'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:59:in `require'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/bin/fluentd:8:in `<top (required)>'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/bin/fluentd:23:in `load'
  2020-07-15 12:42:06 +0000 [warn]: /opt/rh/rh-ruby25/root/usr/local/bin/fluentd:23:in `<main>'
2020-07-15 12:42:06 +0000 [warn]: emit transaction failed: error_class=ArgumentError error="time must be a Fluent::EventTime (or Integer): Float" location="/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/output.rb:825:in `metadata'" tag="linux-audit.log"
  2020-07-15 12:42:06 +0000 [warn]: suppressed same stacktrace
2020-07-15 12:42:06 +0000 [warn]: emit transaction failed: error_class=ArgumentError error="time must be a Fluent::EventTime (or Integer): Float" location="/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/output.rb:825:in `metadata'" tag="linux-audit.log"
  2020-07-15 12:42:06 +0000 [warn]: suppressed same stacktrace
2020-07-15 12:42:06 +0000 [warn]: emit transaction failed: error_class=ArgumentError error="time must be a Fluent::EventTime (or Integer): Float" location="/opt/rh/rh-ruby25/root/usr/local/share/gems/gems/fluentd-1.9.2/lib/fluent/plugin/output.rb:825:in `metadata'" tag="linux-audit.log"
  2020-07-15 12:42:06 +0000 [warn]: suppressed same stacktrace


Expected results:
The subscription status turns to 'Stale' after lose telemetry 3 hours
Additional info: