Questions about the timeout search option

Elastic Stack Elasticsearch
1

Link to appropriate documentation:
http://www.elasticsearch.org/guide/en/elasticsearch/guide/current/_search_options.html#_literal_timeout_literal_2

In particular: "By default, the coordinating node waits to receive a
response from all shards. If one node is having trouble, it could slow down
the response to all search requests."

  1. Is it the case where if I don't set the timeout, the coordinating node
    will really wait forever?

  2. When would this situation occur? I'm assuming when cluster state is
    "yellow", the coordinating node knows not to request from the "bad" shard.
    Just high load/GC on a particular node?

  3. Any reason not to set this on all my requests to a relatively high value?

Thanks,

--
Nick Canzoneri
Developer, Wildbit http://wildbit.com/
Beanstalk http://beanstalkapp.com/, Postmark http://postmarkapp.com/,
dploy.io

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