[CI] SynonymsManagementAPIServiceIT testUpdateRuleWithMaxSynonyms failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic #7795 / openjdk24_entitlements_false_checkpart1_java-matrix
• elasticsearch-pull-request #68912 / part-1

Reproduction Line:

./gradlew ":server:internalClusterTest" --tests "org.elasticsearch.synonyms.SynonymsManagementAPIServiceIT.testUpdateRuleWithMaxSynonyms" -Dtests.seed=A80D8F1B8636FD3F -Dtests.jvm.argline="-Des.entitlements.enabled=false" -Dtests.locale=en-BS -Dtests.timezone=Australia/Sydney -Druntime.java=24

Applicable branches:
main

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: unexpected

Issue Reasons:

• [main] 2 failures in test testUpdateRuleWithMaxSynonyms (1.3% fail rate in 150 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 testUpdateRuleWithMaxSynonyms (1.3% fail rate in 150 executions)

Build Scans:

• elasticsearch-periodic #7795 / openjdk24_entitlements_false_checkpart1_java-matrix
• elasticsearch-pull-request #68912 / part-1

[elasticsearchmachine]

Pinging @elastic/es-search-relevance (Team:Search Relevance)