# Recover connection vs logstash further processing

**URL:** <https://discuss.elastic.co/t/recover-connection-vs-logstash-further-processing/305429>\
**Category:** Logstash\
**Tags:** docker\
**Created:** [May 23, 2022, 7:36pm UTC](https://discuss.elastic.co/t/recover-connection-vs-logstash-further-processing/305429 "2022-05-23T19:36:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![INS](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ins/32/92827_2.png) [@INS](https://discuss.elastic.co/u/INS)\
**Post date:** [May 23, 2022, 7:36pm UTC](https://discuss.elastic.co/t/recover-connection-vs-logstash-further-processing/305429/1 "2022-05-23T19:36:12Z")

</div>

Hi  
I observe in my production environment such suspicious behavior.  
Under in spike period of shooting data to ELK cluster a few of master nodes are occupying  
and in that time I got it that connection is Unreachable. That's clear. But why after recover connection logstash doesn't process source files ??? in the logs I didn't find this answer. Maybe I have some wrong configuration. How I can troubleshoot that case?

```auto
[WARN] 2022-05-22 15:07:41.274 [[machine1]>worker4] elasticsearch - Marking url as dead. Last error: [LogStash::Outputs::ElasticSearch::HttpClient::Pool::Hos tUnreachableError] Elasticsearch Unreachable: [http://elastic_writer:xxxxxx@10.210.130.225:9202/][Manticore::SocketException] Connection reset by peer (Writ e failed) {:url=>http://elastic_writer:xxxxxx@10.210.130.225:9202/, :error_message=>"Elasticsearch Unreachable: [http://elastic_writer:xxxxxx@10.210.130.225 :9202/][Manticore::SocketException] Connection reset by peer (Write failed)", :error_class=>"LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreach ableError"}
[ERROR] 2022-05-22 15:07:41.275 [[machine1]>worker4] elasticsearch - Attempted to send a bulk request but Elasticsearch appears to be unreachable or down {:me ssage=>"Elasticsearch Unreachable: [http://elastic_writer:xxxxxx@10.210.130.225:9202/][Manticore::SocketException] Connection reset by peer (Write failed)", :exception=>LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreachableError, :will_retry_in_seconds=>2}
[WARN] 2022-05-22 15:07:43.470 [[machine1]>worker4] elasticsearch - Marking url as dead. Last error: [LogStash::Outputs::ElasticSearch::HttpClient::Pool::Hos tUnreachableError] Elasticsearch Unreachable: [http://elastic_writer:xxxxxx@10.210.130.226:9220/][Manticore::SocketException] Connection reset by peer (Writ e failed) {:url=>http://elastic_writer:xxxxxx@10.210.130.226:9220/, :error_message=>"Elasticsearch Unreachable: [http://elastic_writer:xxxxxx@10.210.130.226 :9220/][Manticore::SocketException] Connection reset by peer (Write failed)", :error_class=>"LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreach ableError"}
[ERROR] 2022-05-22 15:07:43.471 [[machine1]>worker4] elasticsearch - Attempted to send a bulk request but Elasticsearch appears to be unreachable or down {:me ssage=>"Elasticsearch Unreachable: [http://elastic_writer:xxxxxx@10.210.130.226:9220/][Manticore::SocketException] Connection reset by peer (Write failed)", :exception=>LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreachableError, :will_retry_in_seconds=>4}
[WARN] 2022-05-22 15:07:44.895 [Ruby-0-Thread-9: :1] elasticsearch - Restored connection to ES instance {:url=>"http://elastic_writer:xxxxxx@10.210.130.225 :9202/"}
[WARN] 2022-05-22 15:07:44.920 [Ruby-0-Thread-9: :1] elasticsearch - Restored connection to ES instance {:url=>"http://elastic_writer:xxxxxx@10.210.130.226 :9220/"}

```

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [June 20, 2022, 7:36pm UTC](https://discuss.elastic.co/t/recover-connection-vs-logstash-further-processing/305429/2 "2022-06-20T19:36:21Z")

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