[CI] DocsClientYamlTestSuiteIT test {yaml=reference/esql/esql-across-clusters/line_192} failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic #5933 / openjdk21_checkpart1_java-matrix
• elasticsearch-pull-request #50794 / part-1

Reproduction Line:

./gradlew ":docs:yamlRestTest" --tests "org.elasticsearch.smoketest.DocsClientYamlTestSuiteIT.test {yaml=reference/esql/esql-across-clusters/line_192}" -Dtests.seed=3B707911AD86A4DD -Dtests.locale=en-PK -Dtests.timezone=Asia/Gaza -Druntime.java=21

Applicable branches:
8.16

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

org.elasticsearch.client.WarningFailureException: method [DELETE], host [http://[::1]:43473], URI [*,-.ds-ilm-history-*,-.ds-.slm-history-*,-.ds-.watcher-history-*?expand_wildcards=open%2Cclosed%2Chidden], status line [HTTP/1.1 200 OK]
Warnings: [this request accesses system indices: [.async-search], but in a future major version, direct access to system indices will be prevented by default]
{"acknowledged":true}

Issue Reasons:

• [8.16] 2 failures in test test {yaml=reference/esql/esql-across-clusters/line_192} (0.5% fail rate in 436 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 8.16

Mute Reasons:

• [8.16] 2 failures in test test {yaml=reference/esql/esql-across-clusters/line_192} (0.5% fail rate in 436 executions)

Build Scans:

• elasticsearch-periodic #5933 / openjdk21_checkpart1_java-matrix
• elasticsearch-pull-request #50794 / part-1

[elasticsearchmachine]

Pinging @elastic/es-delivery (Team:Delivery)

[elasticsearchmachine]

Pinging @elastic/es-analytical-engine (Team:Analytics)

[alex-spies]

This was fixed and unmuted on 8.17 and later: #115218

8.16.6 was already released, so I think there's no point in unmuting this test now.