[CI] MetadataCreateIndexServiceTests testIndexSettingProviderPrivateSetting failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #10655 / ubuntu-2204_platform-support-unix
• elasticsearch-pull-request #91801 / part-1

Reproduction Line:

./gradlew ":server:test" --tests "org.elasticsearch.cluster.metadata.MetadataCreateIndexServiceTests.testIndexSettingProviderPrivateSetting" -Dtests.seed=B43A90546411F38E -Dtests.locale=is -Dtests.timezone=Pacific/Pitcairn -Druntime.java=24

Applicable branches:
main

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: did not expect private setting to be rejected when added via IndexSettingProvider

Issue Reasons:

• [main] 2 failures in test testIndexSettingProviderPrivateSetting (0.3% fail rate in 746 executions)

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

[elasticsearchmachine]

This has been muted on branch main

Mute Reasons:

• [main] 2 failures in test testIndexSettingProviderPrivateSetting (0.3% fail rate in 746 executions)

Build Scans:

• elasticsearch-periodic-platform-support #10655 / ubuntu-2204_platform-support-unix
• elasticsearch-pull-request #91801 / part-1

[elasticsearchmachine]

Pinging @elastic/es-data-management (Team:Data Management)

[dakrone]

@felixbarny I believe this is related to your work in #133789, could you take a look?