# Nodes out of cluster- ES crash- crash logs?

**URL:** <https://discuss.elastic.co/t/nodes-out-of-cluster-es-crash-crash-logs/93989>\
**Category:** Elasticsearch\
**Created:** [July 20, 2017, 5:08pm UTC](https://discuss.elastic.co/t/nodes-out-of-cluster-es-crash-crash-logs/93989 "2017-07-20T17:08:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![dimalini](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dimalini/32/22448_2.png) [@dimalini](https://discuss.elastic.co/u/dimalini)\
**Post date:** [July 20, 2017, 5:08pm UTC](https://discuss.elastic.co/t/nodes-out-of-cluster-es-crash-crash-logs/93989/1 "2017-07-20T17:08:05Z")

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Hi,  
[ES2.4.1]  
We have a 11 node cluster[3master, 3query, 5data]. Two nodes [Master1 and Query1] suddenly left the cluster for around 30 mins .  
All I could see in the logs is

_Caught exception while handling client http traffic, closing connection..._  
_java.io.IOException: An existing connection was forcibly closed by the remote host_

and

_connect\_timeout[30s]]; nested: ConnectException[Connection timed out: no further information:];_

The ES dashboards indicates that the memory/processortime/heap usage was very normal and there weren't any spikes.

Other than the fact that Master1 and Query1 were re-started on ES crashing, how do i verify why it crashed in the first place ?

Any help or clarification here would be really appreciated. Thanks in advance!

-Divya

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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:** [August 17, 2017, 5:08pm UTC](https://discuss.elastic.co/t/nodes-out-of-cluster-es-crash-crash-logs/93989/2 "2017-08-17T17:08:28Z")

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Closed on August 17, 2017, 5:08pm UTC

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