# Elasticsearch output plugin: frequent Connection Reset errors
**URL:** https://discuss.elastic.co/t/elasticsearch-output-plugin-frequent-connection-reset-errors/43755
**Category:** Logstash
**Created:** [March 8, 2016, 10:30am UTC](https://discuss.elastic.co/t/elasticsearch-output-plugin-frequent-connection-reset-errors/43755 "2016-03-08T10:30:18Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@mguiwin](https://discuss.elastic.co/u/mguiwin)
#### Post date: [March 8, 2016, 10:30am UTC](https://discuss.elastic.co/t/elasticsearch-output-plugin-frequent-connection-reset-errors/43755/1 "2016-03-08T10:30:18Z")
Hello,
I often get this in Logstash logs (every 5-10 minutes):
`{:timestamp=>"2016-03-08T10:53:34.880000+0100", :message=>"Attempted to send a bulk request to Elasticsearch configured at '[\"http://xxx.xxx.xxx.xxx:9200/\"]', but Elasticsearch appears to be unreachable or down!", :client_config=>{:hosts=>["http://xxx.xxx.xxx.xxx:9200/"], :ssl=>nil, :transport_options=>{:socket_timeout=>10, :request_timeout=>10, :proxy=>nil, :ssl=>{}}, :transport_class=>Elasticsearch::Transport::Transport::HTTP::Manticore, :logger=>nil, :tracer=>nil, :reload_connections=>false, :retry_on_failure=>false, :reload_on_failure=>false, :randomize_hosts=>false}, :error_message=>"Connection reset", :class=>"Manticore::SocketException", :level=>:error}`
I'm using Logstash 2.2.2 and ES 2.2.
Is it due to HTTP pipelining (enabled in my ES config)? There is that **http.pipelining.max\_events** setting which is described as: _"The maximum number of events to be queued up in memory before a HTTP connection is closed, defaults to 10000."_ So I guess ES closes the HTTP pipeline after max events are received, which might be the source of the exception, right?
Most importantly, the log says _"retry\_on\_failure=\>false"_: does that mean data is lost when this error happens and no retries will be attempted?
Thanks,
MG
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 5:07am UTC](https://discuss.elastic.co/t/elasticsearch-output-plugin-frequent-connection-reset-errors/43755/2 "2017-07-06T05:07:47Z")