How to Fix Read timed out in Elasticsearch

Question

I used Elasticsearch-1.1.0 to index tweets. The indexing process is okay. Then I upgraded the version. Now I use Elasticsearch-1.3.2, and I get this message randomly:

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Answer 1

You also should check if all fine with elastic. Some shard can be unavailable, here is nice doc about possible reasons of unavailable shard https://www.datadoghq.com/blog/elasticsearch-unassigned-shards/