Secondary configuration not supported

[sahilsareen]

Configuration:

<match http_source>
  type sns
  sns_topic_name XX
  aws_key_id XX
  aws_sec_key XX
  sns_endpoint XX

  <secondary>
    type file
    path /var/log/td-agent/failed_events_http_source
  </secondary>
</match>

# Accept events from HTTP source at http://SOMEURL:8827/http_source/<JSON EVENT>
<source>
  type http
  port 8827
</source>

Steps to reproduce:

1. Do the above configuration
2. Start HTTP traffic
3. Delete the SNS topic

Expectation:
Events should now be appended to /var/log/td-agent/failed_events_http_source

Outcome:
On console:

500 Internal Server Error
Topic does not exist

Reference: http://docs.fluentd.org/articles/buffer-plugin-overview#secondary-output