I'm trying to update elasticsearch version to 7.9.2 but I've encountered a problem with HadoopFormatIOElasticTest that uses ES in-memory emulator that is no longer supported: https://stackoverflow.com/questions/51316813/elastic-node-on-local-in-6-2
It's recommended to use testcontainers as proposed here https://github.com/allegro/embedded-elasticsearch but it would transform the in-memory test to integration test (which has to be done anyway) There is also Elasticsearch test framework with ESSingleNodeTestCase but it causes Jar Hell problem and I don't think it's easily solvable - the dependencies in "java core" and "java core test". I tried to Is running the precommit test with testcontainers acceptable? It's the easiest fix. About the integration test: I'd like to enable the IT test in Java PostCommit but there are some assumptions about the data that is already written to Elasticsearch but I can't find anywhere what that data should be (Probably something like Item_Price0, Item_Price1 etc but I'm not sure)
