Elasticsearch 2.4 officially reached its end of life in february 2018, and Elasticsearch 5.2 on 2018-06-08, according to this document: https://www.elastic.co/support/eol
The Elasticsearch integration in Search 5 was experimental, so dropping such support for outdated versions of Elasticsearch is not outrageously unexpected.
Also, users migrating to Search 6 will be able to first migrate do ES 5.6, then upgrade to Search 6.
TO DO:
* In particular, remove any trace of ES 5.5 and below in the POMs, Jenkinsfile, .travis.yml.
* Also remove any trace of ES 5.5 and below in the main code.
* Maybe keep it in the legacy code, for future reference? Guillaume Smet [~gsmet] WDYT?
See also HSEARCH-3262 |
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