Elasticsearch timing out / unresponsive

My ELK stack is not functioning properly. I can load Kibana up in a web page, but in any search, I just see the "Searching...." for a few minutes, and then it tells me that elasticsearch has timed out. I have tried restarting the elasticsearch service, and made sure it is running.. I'm not sure where to go from here.
Elasticsearch v2.3.4

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