[CI] SearchWithMinCompatibleSearchNodeIT testMinVersionAsNewVersion failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic #4658 / 7.2.1_bwc
• elasticsearch-periodic #4607 / 7.5.2_bwc

Reproduction Line:

./gradlew ':qa:mixed-cluster:v7.2.1#mixedClusterTest' -Dtests.class="org.elasticsearch.backwards.SearchWithMinCompatibleSearchNodeIT" -Dtests.method="testMinVersionAsOldVersion" -Dtests.seed=C9112497E5F5BC78 -Dtests.bwc=true -Dtests.locale=ar-KW -Dtests.timezone=Africa/Asmara -Druntime.java=22

Applicable branches: 7.17

Reproduces locally?: N/A

Failure History: See dashboard

Failure Message:

org.elasticsearch.client.ResponseException: method [PUT], host [http://[::1]:34195], URI [test_min_version/_doc/6], status line [HTTP/1.1 401 Unauthorized]
{"error":{"root_cause":[{"type":"security_exception","reason":"missing authentication credentials for REST request [test_min_version/_doc/6]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"missing authentication credentials for REST request [test_min_version/_doc/6]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}

Issue Reasons:

• [7.17] 2 failures in test testMinVersionAsNewVersion (1.0% fail rate in 191 executions)
• [7.17] 2 failures in pipeline elasticsearch-periodic (18.2% fail rate in 11 executions)

Note: This issue was created using new test triage automation. Please report issues or feedback to es-delivery.