[CI] XPackRestIT test {p0=ml/data_frame_analytics_crud/Test put config with unknown field in outlier detection analysis} failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #4746 / sles-15_platform-support-unix
• elasticsearch-pull-request #39795 / part-3
• elasticsearch-pull-request #39641 / part-3
• elasticsearch-pull-request #39641 / rest-compatibility

Reproduction Line:

./gradlew ":x-pack:plugin:yamlRestTest" --tests "org.elasticsearch.xpack.test.rest.XPackRestIT.test {p0=ml/data_frame_analytics_crud/Test put config with unknown field in outlier detection analysis}" -Dtests.seed=38B023AA26DEA200 -Dtests.locale=zh-CN -Dtests.timezone=Africa/Bamako -Druntime.java=23

Applicable branches:
main

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

org.elasticsearch.client.ResponseException: method [GET], host [http://[::1]:39319], URI [/_ml/trained_models/_stats?size=10000], status line [HTTP/1.1 500 Internal Server Error]
{"error":{"root_cause":[],"type":"exception","reason":"Searching for stats for models [lang_ident_model_1] failed","caused_by":{"type":"search_phase_execution_exception","reason":"","phase":"query","grouped":true,"failed_shards":[],"caused_by":{"type":"search_phase_execution_exception","reason":"Search rejected due to missing shards [[.ml-stats-000001][0]]. Consider using `allow_partial_search_results` setting to bypass this error.","phase":"query","grouped":true,"failed_shards":[]}}},"status":500}

Issue Reasons:

• [main] 4 failures in test test {p0=ml/data_frame_analytics_crud/Test put config with unknown field in outlier detection analysis} (0.4% fail rate in 899 executions)
• [main] 2 failures in step part-3 (0.9% fail rate in 225 executions)
• [main] 2 failures in pipeline elasticsearch-pull-request (0.8% fail rate in 254 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] 4 failures in test test {p0=ml/data_frame_analytics_crud/Test put config with unknown field in outlier detection analysis} (0.4% fail rate in 899 executions)
• [main] 2 failures in step part-3 (0.9% fail rate in 225 executions)
• [main] 2 failures in pipeline elasticsearch-pull-request (0.8% fail rate in 254 executions)

Build Scans:

• elasticsearch-periodic-platform-support #4746 / sles-15_platform-support-unix
• elasticsearch-pull-request #39795 / part-3
• elasticsearch-pull-request #39641 / part-3
• elasticsearch-pull-request #39641 / rest-compatibility

[elasticsearchmachine]

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

[elasticsearchmachine]

Pinging @elastic/ml-core (Team:ML)