Elasticsearch 7 will become EOL

[tommydeboer]

Elasticsearch 17.7 (the version we are/should be using) is supported until 6 months after Elasticsearch 9.0 comes out.

After that we need to migrate to ES8. The ES Java REST client we use is deprecated, however it can be run in compatibility mode so we don't need to upgrade to the new Java API client yet. This requires a small code change, see this manual page. The RestHighLevelClient is created in org.molgenis.data.elasticsearch.client.ClientFactory and can be changed there to enable the compatibility mode.

Then follow the migragion guide

[jelmerveen]

Elastic search EOL estimate

Product	Release Series	End of Maintenance Term
Elasticsearch	8.x	The later of 2024-08-10 or 6 months after the release date of 9.0 (TBD)

Elasticsearch all version support table

Elasticsearch	Supported Until Subscription Start Date Is Before October 1, 2022	Supported Until Subscription Start Date Is On or After October 1, 2022	Maintained Until
7.13.x	2022-11-25	2023-02-10	7.14.0
7.14.x	2023-02-03	2023-02-10	7.15.0
7.15.x	2023-03-22	2023-02-10	7.16.0
7.16.x	2023-06-07	2023-02-10	7.17.0
7.17.x	9.0.0	9.0.0	9.0.0

source: elastic search

[jelmerveen]

So according to above table we should migrate directly to 9? Else we would be doing it again in 6 months, worst case scenario.

[tommydeboer]

@jelmerveen 7 will be supported for 6 months after elasticsearch 9 is released. After that 8 will be supported much longer. Migrating directly to 9 will probably require lots of code changes because the old java client is deprecated.

[jelmerveen]

But as I read it, 8 will not even make it until 2024 perhaps. As you can read in the top table:

Elasticsearch	8.x	The later of 2024-08-10 or 6 months after the release date of 9.0 (TBD)

[tommydeboer]

Ah yes you are right! Depending on when 9 is released it is possible that migrating to 9 at once is much more efficiënt. This will require a much more drastic refactoring because I don't think the current java API is still supported.