Connection to AWS ElasticSearch is broken when using AWS credentials

[darwin67]

Hi there.

I think this recent change is breaking the connection to the AWS ElasticSearch service.

I'm getting the following error in the /var/log/td-agent/td-agent.log.

2016-06-21 23:12:01 +0000 [warn]: temporarily failed to flush the buffer. next_retry=2016-06-21 23:48:15 +0000 error_class="NameError" error="undefined local variable or method `access_key' for #<Fluent::AwsElasticsearchServiceOutput:0x007f5fc36fb9c0>" plugin_id="object:3fafe1b7dce0"
  2016-06-21 23:12:01 +0000 [warn]: suppressed same stacktrace

As the error is saying, there's no such thing as access_key defined anywhere and I believed that is the same for secret_key too.

[darwin67]

Oh, forgot to mention.

Steps to replicate the error.

• fresh install this plugin
• provide access_key_id and secret_access_key in <match *.**>
• start/restart td-agent

[atomita]

Thank you for a bug fix.

I should write the test code...