#### Problem

...

#### Steps to replicate

Provide example config and message

#### Expected Behavior or What you need to ask

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#### Using Fluentd and ES plugin versions

* OS version
* Fluentd v0.12 or v0.14/v1.0
  * paste result of ``fluentd --version`` or ``td-agent --version``
* AWS ES Service plugin version
  * paste boot log of fluentd or td-agent
  * paste result of ``fluent-gem list``, ``td-agent-gem list`` or your Gemfile.lock
* IAM policies for AWS ES Service (optional)
* ES version (optional)