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https://issues.apache.org/jira/browse/ATLAS-4030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17409549#comment-17409549
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Huajia Chen commented on ATLAS-4030:
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The reason is that atlas-2.1.0 uses es-5.6.4, but JanusGraph-0.5.1 uses
es-7.6.1. Just upgrade atlas's es version
> Elasticsearch 7.x support
> -------------------------
>
> Key: ATLAS-4030
> URL: https://issues.apache.org/jira/browse/ATLAS-4030
> Project: Atlas
> Issue Type: Task
> Reporter: Pawel
> Priority: Major
>
> Support for Elasticsearch version 6.x ends November 20, 2020
> ([https://www.elastic.co/support/eol]).
> We currently get the following error when trying to connect to version 7.x.:
> Caused by: java.lang.NoClassDefFoundError: Could not initialize class
> org.janusgraph.diskstorage.es.rest.RestElasticSearchClient
> –
> Atlas 2.1.0
>
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