# Data nodes fail to connect with a separate monitoring node

**URL:** <https://discuss.elastic.co/t/data-nodes-fail-to-connect-with-a-separate-monitoring-node/162136>\
**Category:** Elasticsearch\
**Tags:** elastic-stack-monitoring\
**Created:** [December 26, 2018, 11:38am UTC](https://discuss.elastic.co/t/data-nodes-fail-to-connect-with-a-separate-monitoring-node/162136 "2018-12-26T11:38:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Harish\_Mata](https://avatars.discourse-cdn.com/v4/letter/h/b5a626/32.png) [@Harish\_Mata](https://discuss.elastic.co/u/Harish_Mata)\
**Post date:** [December 26, 2018, 11:38am UTC](https://discuss.elastic.co/t/data-nodes-fail-to-connect-with-a-separate-monitoring-node/162136/1 "2018-12-26T11:38:20Z")

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I recently created a monitoring node and configured everything as per the documentation on setting up a separate monitoring node for our production elasticsearch nodes.When I tried restarting one of the data nodes it says  
[ERROR][o.e.x.m.e.h.VersionHttpResource] failed to verify minimum version [5.0.0-beta1] on the [xpack.monitoring.exporters.id1] monitoring cluster  
org.elasticsearch.client.ResponseException: GET http://1NODE\_IP:9200/?filter\_path=version.number: HTTP/1.1 401 Unauthorized  
{"error":{"root\_cause":[{"type":"security\_exception","reason":"unable to authenticate user [remote\_monitor] for REST request [/?filter\_path=version.number]","header":{"WWW-Authenticate":"Basic realm="security" charset="UTF-8""}}],"type":"security\_exception","reason":"unable to authenticate user [remote\_monitor] for REST request [/?filter\_path=version.number]","header":{"WWW-Authenticate":"Basic realm="security" charset="UTF-8""}},"status":401}

But I'm able to curl the monitor node from datanode using the same credentials.  
Can I get some help?

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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:** [January 23, 2019, 11:38am UTC](https://discuss.elastic.co/t/data-nodes-fail-to-connect-with-a-separate-monitoring-node/162136/2 "2019-01-23T11:38:29Z")

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