HTTP parse error, malformed request (): #<Puma::HttpParserError: Invalid HTTP format, parsing fails

Elastic Stack Logstash
1

Hi ,

I am getting error logs in logstash 5.2.1 with below error.

2018-08-27 15:36:01 +0200: HTTP parse error, malformed request (): #<Puma::HttpParserError: Invalid HTTP format, parsing fails.>
2018-08-27 15:36:01 +0200: ENV: {"rack.version"=>[1, 3], "rack.errors"=>#<IO:fd 2>, "rack.multithread"=>true, "rack.multiprocess"=>false, "rack.run_once"=>false, "SCRIPT_NAME"=>"", "QUERY_STRING"=>"", "SERVER_PROTOCOL"=>"HTTP/1.1", "SERVER_SOFTWARE"=>"2.16.0", "GATEWAY_INTERFACE"=>"CGI/1.2"}

Can you please what is error. This message is in production and only appearing in newly added servers of logstash

Thanks.

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