[CI] MixedClusterClientYamlTestSuiteIT test {p0=synonyms/110_synonyms_invalid/Reload index with an invalid synonym rule with lenient set to false} failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-intake #16656 / 8.17.2_bwc-snapshots
• elasticsearch-pull-request #52254 / 8.16.4_bwc-snapshots

Reproduction Line:

./gradlew ":qa:mixed-cluster:v8.17.2#mixedClusterTest" -Dtests.class="org.elasticsearch.backwards.MixedClusterClientYamlTestSuiteIT" -Dtests.method="test {p0=synonyms/110_synonyms_invalid/Reload index with an invalid synonym rule with lenient set to false}" -Dtests.seed=3F0878ADE72C5B8 -Dtests.bwc=true -Dtests.locale=kxv-Telu -Dtests.timezone=Asia/Bahrain -Druntime.java=23

Applicable branches:
8.x

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: Failure at [synonyms/110_synonyms_invalid:287]: field [indices.test_index.health] is null

Issue Reasons:

• [8.x] 2 failures in test test {p0=synonyms/110_synonyms_invalid/Reload index with an invalid synonym rule with lenient set to false} (0.2% fail rate in 854 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.x

Mute Reasons:

• [8.x] 2 failures in test test {p0=synonyms/110_synonyms_invalid/Reload index with an invalid synonym rule with lenient set to false} (0.2% fail rate in 854 executions)

Build Scans:

• elasticsearch-intake #16656 / 8.17.2_bwc-snapshots
• elasticsearch-pull-request #52254 / 8.16.4_bwc-snapshots

[elasticsearchmachine]

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

[neilbhavsar]

needs reivew