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https://issues.apache.org/jira/browse/CALCITE-2376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16540853#comment-16540853
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Julian Hyde commented on CALCITE-2376:
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[~asereda] Can you make log4j2.xml consistent in format to other .xml files? In
particular the header.
Also, when your javadoc has paragraphs you must use {{<p>}}, otherwise html
will flow them together. This applies in ElasticsearchNode and
ElasticsearchPolicy.
> Unify ES2 and ES2 adapters. Migrate to low-level rest client
> ------------------------------------------------------------
>
> Key: CALCITE-2376
> URL: https://issues.apache.org/jira/browse/CALCITE-2376
> Project: Calcite
> Issue Type: Improvement
> Components: elasticsearch-adapter
> Reporter: Andrei Sereda
> Assignee: Michael Mior
> Priority: Major
> Fix For: 1.17.0
>
>
> This is an effort to migrate Elastic Search adapters to use [low-level rest
> client|https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/java-rest-low.html].
> Current [native transport
> client|https://www.elastic.co/guide/en/elasticsearch/client/java-api/6.3/client.html]
> has been deprecated in 7.0 (to be removed in 8.x).
> Another advantage of low-level client is that it is compatible with any ES
> server version and has few (non-core) dependencies. As part of this
> improvement, both ES2 and ES5 adapters will be unified and reside under new
> maven module {{elasticsearch}} (contrary to separate {{elasticsearch2}} and
> {{elasticsearch5}}).
> h3. Breaking changes
> Using new {{artifactId}} and {{SchemaFactory}} implementation will force
> clients to change their configuration and dependencies. No other breaking
> changes (except configuration) are expected.
>
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