# Elasticsearch follower/leader\_check error

**URL:** <https://discuss.elastic.co/t/elasticsearch-follower-leader-check-error/236057>\
**Category:** Elasticsearch\
**Created:** [June 6, 2020, 6:47pm UTC](https://discuss.elastic.co/t/elasticsearch-follower-leader-check-error/236057 "2020-06-06T18:47:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Faiz\_Ahmed\_Mushtak\_H](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/faiz_ahmed_mushtak_h/32/47387_2.png) [@Faiz\_Ahmed\_Mushtak\_H](https://discuss.elastic.co/u/Faiz_Ahmed_Mushtak_H)\
**Post date:** [June 6, 2020, 6:47pm UTC](https://discuss.elastic.co/t/elasticsearch-follower-leader-check-error/236057/1 "2020-06-06T18:47:57Z")

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We got the following two exceptions today in our master node

```auto
[2020-06-06T07:52:07,974][WARN][o.e.t.TransportService] [es7advcl02-01] Received response for a request that has timed out, sent [26018ms] ago, timed out [16011ms] ago, action [internal:coordination/fault_detection/follower_check], node [{es7advcl02-02}{Z9H7777WSCecxRWxw-Vgtg}{PfLZ3HshSmm2w3Abyw7djQ}{xxxx}{xxxx:xxxx}{ml.machine_memory=8352976896, ml.max_open_jobs=20, xpack.installed=true}], id [31175861]
[2020-06-06T07:52:07,974][WARN][o.e.t.TransportService] [es7advcl02-01] Received response for a request that has timed out, sent [15011ms] ago, timed out [5003ms] ago, action [internal:coordination/fault_detection/follower_check], node [{es7advcl02-02}{Z9H7777WSCecxRWxw-Vgtg}{PfLZ3HshSmm2w3Abyw7djQ}{xxxx}{xxxx:xxxx}{ml.machine_memory=8352976896, ml.max_open_jobs=20, xpack.installed=true}], id [31176001]

```

An equivalent leader\_check error was there in es7advcl02-02 as well  
During this time, we did see a blip in our iowait stats & there were a couple of 503/504 errors as well. I was wondering what this error is? it's a WARN log, but it affected the stability of our cluster looks like (503/504 errors)

Our cluster state is around `426KB`

---

<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:** [July 4, 2020, 6:48pm UTC](https://discuss.elastic.co/t/elasticsearch-follower-leader-check-error/236057/2 "2020-07-04T18:48:20Z")

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Closed on July 4, 2020, 6:48pm UTC

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