Elasticsearch 2.4.3 very high cpu usage

What is the output of:

GET /
GET /_cat/nodes?v
GET /_cat/health?v
GET /_cat/indices?v
# Optionally 
GET /_cat/shards?v

If some outputs are too big, please share them on gist.github.com and link them here.

Please format your code, logs or configuration files using </> icon as explained in this guide and not the citation button. It will make your post more readable.

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```
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There's a live preview panel for exactly this reasons.

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