Number of `FluentD` or `Collector` pods are showing `failed to flush the buffer` error message

Issue

• FluentD or Collector pods are throwing errors similar to the following:

  2022-01-28T05:59:48.087126221Z 2022-01-28 05:59:48 +0000 : [retry_default] failed to flush the buffer. retry_time=5929 next_retry_seconds=2022-01-28 06:00:44 +0000 chunk="5d66d22fbc13bf20a5da35252471a8f3" error_class=Fluent::Plugin::Elast
  icsearchOutput::RetryStreamEmitFailure error="buffer is full." 
  

• FluentD or Collector pods are consuming high filesystem space under /var/lib/fluentd/
• After getting the alert Elasticsearch Node Disk Flood Watermark Reached, fluentd will fail to deliver logs to Elasticsearch