Issue Summary

Elasticsearch support was deprecated in 8.x and removed in 9.x. The documentation found at https://confluence.atlassian.com/bitbucketserver094/install-and-configure-a-remote-elasticsearch-server-1489802994.html doesn't give any indication that Elasticsearch must not be used for any 9.x version

Steps to Reproduce

1. Go to any 9.x version of this document https://confluence.atlassian.com/bitbucketserver094/install-and-configure-a-remote-elasticsearch-server-1489802994.html

Expected Results

A bold warning that this document is no longer valid once you upgrade to 9.0 or higher

Actual Results

This document discusses how Elasticsearch, up to 7.17.16, can still be configured and used by Bitbucket. No indication using Elasticsearch will generate errors in the logs, and it is unlikely to function

The below exception is thrown in the xxxxxxx.log file:

Caused by: com.atlassian.bitbucket.internal.search.indexing.exceptions.IndexException: Unsupported search version Elasticsearch 7.17.16. Unable to continue, operator intervention is required.
2025-03-11 16:19:27,136 ERROR [I/O dispatcher 13] c.a.b.i.s.c.s.t.DefaultSearchConnectionTester Connected to an unsupported search server version: Elasticsearch 7.17.16

Workaround

Use Elasticsearch is the only available option