Unexpected exception while running Enterprise Search: Faraday::TimeoutError: Read timed out

While running the Enterprise Search server, encountered below issue after creating a few indices:

[app-server][ERROR]: Exception: Unexpected exception while running Enterprise Search: Faraday::TimeoutError: Read timed out
/usr/share/enterprise-search/lib/war/lib/swiftype/exception_tracking.class:47: Read timed out (Faraday::TimeoutError)

I am not seeing any error logs at Elastic Search. I am running 3 replica of ES and 1 instance of enterprise server.