No supported version of Elasticsearch will work with Magento 2.x as of 2019-03-11

[geerlingguy]

Description (*)

In #18974, it was reported that Elasticsearch 6.x versions are incompatible with Magento 2, and installations will silently fail the test connection, and you can't index or search Magento data with Elasticsearch 6 or later.

That issue was closed as it was not considered a bug that Magento supported Elasticsearch 2.x and 5.x and didn't work with 6.x.

Elasticsearch 5.x's End-of-Life date is 2019-03-11 (only a couple weeks away now), and so it will become harder and harder to use Magento with any version of Elasticsearch (especially in cloud environments) after that day arrives.

Expected behavior (*)

• A supported version of Elasticsearch should be able to be used by Magento 2.x.
• The Magento UI for Elasticsearch allows you to select 'Elasticsearch 5.0+', which implies 6 may work (since it's technically '5.0+'), so it would work with Elasticsearch 6.x.

Benefits

• People would be able to use Magento 2.x with a modern, supported version of Elasticsearch.
• People would not have to spend many hours trying to figure out how to get Elasticsearch 5 or 2 running when it is not well supported in most cloud environments, and harder to install than the latest/supported version(s).

Additional information

N/A

[magento-engcom-team]

Hi @geerlingguy. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

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• Information on your environment
• Steps to reproduce
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Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento-engcom-team give me 2.3-develop instance - upcoming 2.3.x release

For more details, please, review the Magento Contributor Assistant documentation.

@geerlingguy do you confirm that you was able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

[geerlingguy]

@magento-engcom-team - Yes. I'm testing on enterprise but also confirmed with community edition.

[magento-engcom-team]

Hi @engcom-backlog-nazar. Thank you for working on this issue.
In order to make sure that issue has enough information and ready for development, please read and check the following instruction: 👇

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Hi @geerlingguy thank you for you report, It will be processed faster if you move this to https://github.com/magento/community-features

[geerlingguy]

@engcom-backlog-nazar - Thanks, I've opened ticket magento/community-features#141, we'll see if the third time's a charm.