[CI] MixedClusterClientYamlTestSuiteIT test {p0=search/180_locale_dependent_mapping/Test Index and Search locale dependent mappings / dates} failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-intake #9907 / 8.16.0_bwc-snapshots
• elasticsearch-intake #9906 / 8.16.0_bwc-snapshots
• elasticsearch-pull-request #32054 / 8.16.0_bwc-snapshots
• elasticsearch-pull-request #32052 / 8.16.0_bwc-snapshots
• elasticsearch-pull-request #32034 / 8.16.0_bwc-snapshots
• elasticsearch-pull-request #32051 / 8.16.0_bwc-snapshots
• elasticsearch-pull-request #32049 / 8.16.0_bwc-snapshots
• elasticsearch-pull-request #32048 / 8.16.0_bwc-snapshots
• elasticsearch-intake #9904 / 8.16.0_bwc-snapshots
• elasticsearch-intake #9903 / 8.16.0_bwc-snapshots

Reproduction Line:

./gradlew ":qa:mixed-cluster:v8.16.0#mixedClusterTest" -Dtests.class="org.elasticsearch.backwards.MixedClusterClientYamlTestSuiteIT" -Dtests.method="test {p0=search/180_locale_dependent_mapping/Test Index and Search locale dependent mappings / dates}" -Dtests.seed=39E00D4F8BF7F275 -Dtests.bwc=true -Dtests.locale=en-SZ -Dtests.timezone=NST -Druntime.java=22

Applicable branches:
main

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: Failure at [search/180_locale_dependent_mapping:3]: got unexpected warning header [
	299 Elasticsearch-8.16.0-3c91b97fd5c3738b114df38b6a6c460655384592 "Date format [E, d MMM yyyy HH:mm:ss Z] contains textual field specifiers that could change in JDK 23"
]

Issue Reasons:

• [main] 22 consecutive failures in test test {p0=search/180_locale_dependent_mapping/Test Index and Search locale dependent mappings / dates}
• [main] 21 consecutive failures in step 8.16.0_bwc-snapshots
• [main] 5 consecutive failures in pipeline elasticsearch-intake
• [main] 16 consecutive failures in pipeline elasticsearch-pull-request
• [main] 22 failures in test test {p0=search/180_locale_dependent_mapping/Test Index and Search locale dependent mappings / dates} (21.8% fail rate in 101 executions)
• [main] 21 failures in step 8.16.0_bwc-snapshots (22.1% fail rate in 95 executions)
• [main] 5 failures in pipeline elasticsearch-intake (23.8% fail rate in 21 executions)
• [main] 16 failures in pipeline elasticsearch-pull-request (21.6% fail rate in 74 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] 10 consecutive failures in test test {p0=search/180_locale_dependent_mapping/Test Index and Search locale dependent mappings / dates}
• [main] 9 consecutive failures in step 8.16.0_bwc-snapshots
• [main] 9 consecutive failures in pipeline elasticsearch-pull-request
• [main] 10 failures in test test {p0=search/180_locale_dependent_mapping/Test Index and Search locale dependent mappings / dates} (10.8% fail rate in 93 executions)
• [main] 9 failures in step 8.16.0_bwc-snapshots (10.3% fail rate in 87 executions)
• [main] 9 failures in pipeline elasticsearch-pull-request (12.7% fail rate in 71 executions)

Build Scans:

• elasticsearch-intake #9902 / 8.16.0_bwc-snapshots
• elasticsearch-pull-request #32037 / 8.16.0_bwc-snapshots
• elasticsearch-pull-request #32035 / 8.16.0_bwc-snapshots
• elasticsearch-pull-request #32034 / 8.16.0_bwc-snapshots
• elasticsearch-pull-request #32032 / 8.16.0_bwc-snapshots
• elasticsearch-pull-request #32033 / 8.16.0_bwc-snapshots
• elasticsearch-pull-request #32027 / 8.16.0_bwc-snapshots
• elasticsearch-pull-request #31967 / 8.16.0_bwc-snapshots
• elasticsearch-pull-request #31973 / 8.16.0_bwc
• elasticsearch-pull-request #31964 / 8.16.0_bwc-snapshots

[elasticsearchmachine]

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

[masseyke]

For some reason the warning message is now slightly different, causing this test to fail again (https://gradle-enterprise.elastic.co/s/vaf33irpo2tg6/tests/task/:qa:mixed-cluster:v8.16.0%23mixedClusterTest/details/org.elasticsearch.backwards.MixedClusterClientYamlTestSuiteIT/test%20%7Bp0=search%2F180_locale_dependent_mapping%2FTest%20Index%20and%20Search%20locale%20dependent%20mappings%20%2F%20dates%7D?top-execution=1)

Caused by: java.lang.AssertionError: got unexpected warning header [ |  
-- | --
  | 299 Elasticsearch-8.16.0-a2188010b76932ed1a86974715987b78ee2027ef "Date format [E, d MMM yyyy HH:mm:ss Z] contains textual field specifiers that could change in JDK 23. For more information, see https://ela.st/jdk-23-locales" |  
  | ]