[CI] XPackRestIT test {p0=ml/evaluate_data_frame/Test outlier_detection with query} failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic #4779 / openjdk21_checkpart3_java-matrix
• elasticsearch-pull-request #39795 / part-3

Reproduction Line:

./gradlew ":x-pack:plugin:yamlRestTest" --tests "org.elasticsearch.xpack.test.rest.XPackRestIT.test {p0=ml/evaluate_data_frame/Test outlier_detection with query}" -Dtests.seed=C1A6A2528A5BF247 -Dtests.locale=hr-Latn-HR -Dtests.timezone=Asia/Pyongyang -Druntime.java=21

Applicable branches:
main

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

org.elasticsearch.client.ResponseException: method [GET], host [http://[::1]:45647], 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] 2 failures in test test {p0=ml/evaluate_data_frame/Test outlier_detection with query} (0.3% fail rate in 750 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 test {p0=ml/evaluate_data_frame/Test outlier_detection with query} (0.3% fail rate in 750 executions)

Build Scans:

• elasticsearch-periodic #4779 / openjdk21_checkpart3_java-matrix
• elasticsearch-pull-request #39795 / part-3

[elasticsearchmachine]

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

[elasticsearchmachine]

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

[elasticsearchmachine]

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