DEPRECATION: Rsolr.new/connect option 'read_timeout' is deprecated and will be removed in Rsolr 3.

[rocket-turtle]

DEPRECATION: Rsolr.new/connect option 'read_timeout' is deprecated and will be removed in Rsolr 3. 'timeout' is currently a synonym, use that instead.

https://github.com/rsolr/rsolr/blob/v2.5.0/lib/rsolr/client.rb#L39

if options[:read_timeout]
  warn "DEPRECATION: Rsolr.new/connect option `read_timeout` is deprecated and will be removed in Rsolr 3. `timeout` is currently a synonym, use that instead."
end

We set the timeout like this: Sunspot.session.config.solr.read_timeout = 2

I tried to change it to: Sunspot.session.config.solr.timeout = 2

This leads to the error:

NoMethodError:
  undefined method `timeout=' for #<LightConfig::Configuration:0x00007f8134c3c618>

The read_timeout for the LightConfig::Configuration is defined here:
https://github.com/sunspot/sunspot/blob/v2.6.0/sunspot/lib/sunspot/configuration.rb#L26

Quick fix would be to change the connection config in
https://github.com/sunspot/sunspot/blob/v2.6.0/sunspot/lib/sunspot/session.rb#L259

Please let me know if you think there are any other side effects. read_timeout is used quit often.
https://github.com/sunspot/sunspot/pull/1017/files