Vagrants/blackbird-td-agent — pull request #2 by JumpeiArashi (2014-12-24 00:49:34+00:00)
Title: Handling KeyError "no buffer_queue_length key"

* All `output_plugin`s don't support output buffer information to `monitor_agent`'s json.

e.g: copy type plugin.. etc

```json
{
"plugins": [
{
"config": {
"type": "copy"
},
"output_plugin": true,
"plugin_id": "object:3fbd2af24a64",
"retry_count": null,
"type": "copy"
}
]
}
```