Intermittent ConnectionFailed errors from ElasticSearch filter


I've set up a Logstash pipeline with a filebeat input, a couple of ElasticSearch filters to retrieve previous events and an ElasticSearch ouput. I am getting the following errors intermittently in the logs:

[2018-06-13T09:11:13,376][WARN ][logstash.filters.elasticsearch] Failed to query elasticsearch for previous event {:index=>"my-index*", :query=>"request_id:248f7e42-a168-4d17-9eed-ce2eaa351619 AND log_message:\"My log message\"", :event=>#<LogStash::Event:0x21582863>, :error=>#<Faraday::ConnectionFailed>}

Here is my pipeline YML:

I've tried adjusting the sleep time and the number of Logstash pipeline workers in case multiple threads were hogging connections or something but still getting the intermittent errors with any configuration.

I am using Logstash 6.2.4 locally on Windows Server 2012 R2. The ElasticSearch instance is hosted on the Elastic Cloud.

Please help.


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