# Elasticsearch node random removed from cluster

**URL:** <https://discuss.elastic.co/t/elasticsearch-node-random-removed-from-cluster/72732>\
**Category:** Elasticsearch\
**Created:** [January 25, 2017, 6:45am UTC](https://discuss.elastic.co/t/elasticsearch-node-random-removed-from-cluster/72732 "2017-01-25T06:45:34Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jason000zhang](https://avatars.discourse-cdn.com/v4/letter/j/ecae2f/32.png) [@jason000zhang](https://discuss.elastic.co/u/jason000zhang)\
**Post date:** [January 25, 2017, 6:45am UTC](https://discuss.elastic.co/t/elasticsearch-node-random-removed-from-cluster/72732/1 "2017-01-25T06:45:35Z")

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I have a elasticsearch cluster one master , three hot nodes ,nine stale nodes  
three hot nodes are used to bulk data ,but the hot nodes are removed and then added by itself  
I change config fd as follow  
discovery.zen.fd.ping\_timeout: 600s  
discovery.zen.fd.ping\_retries: 6  
discovery.zen.fd.ping\_interval: 60s

but hot node still removed , I find trace log on master node

[2017-01-25T13:43:02,408][TRACE][o.e.t.TaskManager] [oa-master-01] register 12456 [netty] [internal:discovery/zen/fd/master\_ping] []  
[2017-01-25T13:43:02,408][TRACE][o.e.d.z.MasterFaultDetection] [oa-master-01] checking ping from {oa-hot-02}{lpWsrreLTAeDPaAqPghmRw}{ZjGgLGT0TpKtZI2r4aCGMg}{10.255.246.55}{10.255.246.55:9300}{group=hot} under a cluster state thread  
[2017-01-25T13:43:02,408][TRACE][o.e.c.s.ClusterService] [oa-master-01] will process [master ping (from: {oa-hot-02}{lpWsrreLTAeDPaAqPghmRw}{ZjGgLGT0TpKtZI2r4aCGMg}{10.255.246.55}{10.255.246.55:9300}{group=hot})]  
[2017-01-25T13:43:02,408][DEBUG][o.e.c.s.ClusterService] [oa-master-01] processing [master ping (from: {oa-hot-02}{lpWsrreLTAeDPaAqPghmRw}{ZjGgLGT0TpKtZI2r4aCGMg}{10.255.246.55}{10.255.246.55:9300}{group=hot})]: execute  
[2017-01-25T13:43:02,423][TRACE][o.e.c.s.ClusterService] [oa-master-01] failed to execute cluster state update in [0s], state:  
[2017-01-25T13:43:02,425][DEBUG][o.e.c.s.ClusterService] [oa-master-01] cluster state update task [master ping (from: {oa-hot-02}{lpWsrreLTAeDPaAqPghmRw}{ZjGgLGT0TpKtZI2r4aCGMg}{10.255.246.55}{10.255.246.55:9300}{group=hot})] failed  
[2017-01-25T13:43:02,425][TRACE][o.e.t.TaskManager] [oa-master-01] unregister task for id: 12456

but i cannot find reason, please help ,thank you  
my elasticsearch cluster version is 5.1.1

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<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [January 29, 2017, 4:30am UTC](https://discuss.elastic.co/t/elasticsearch-node-random-removed-from-cluster/72732/2 "2017-01-29T04:30:54Z")

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Is it GC? What happens in the logs on these hot nodes?

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [February 26, 2017, 4:31am UTC](https://discuss.elastic.co/t/elasticsearch-node-random-removed-from-cluster/72732/3 "2017-02-26T04:31:47Z")

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