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[CI] CohereServiceMixedIT testRerank failing #130009

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@elasticsearchmachine

Description

@elasticsearchmachine

Build Scans:

Reproduction Line:

./gradlew ":x-pack:plugin:inference:qa:mixed-cluster:v8.19.0#javaRestTest" -Dtests.class="org.elasticsearch.xpack.inference.qa.mixed.CohereServiceMixedIT" -Dtests.method="testRerank" -Dtests.seed=F5742D87DCBA5A9A -Dtests.bwc=true -Dtests.locale=yav-Latn-CM -Dtests.timezone=Etc/GMT+10 -Druntime.java=24

Applicable branches:
main

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

org.elasticsearch.client.ResponseException: method [PUT], host [http://[::1]:39935], URI [_inference/rerank/mixed-cluster-rerank?error_trace], status line [HTTP/1.1 500 Internal Server Error]
{"error":{"root_cause":[{"type":"transport_serialization_exception","reason":"Failed to deserialize response from handler [ContextRestoreResponseHandler[[org.elasticsearch.action.ActionListenerImplementations$RunBeforeActionListener/org.elasticsearch.action.ActionListenerImplementations$RunBeforeActionListener/org.elasticsearch.tasks.TaskManager$1{org.elasticsearch.action.ActionListenerImplementations$RunAfterActionListener/org.elasticsearch.rest.action.RestToXContentListener@75dc4c76/release[org.elasticsearch.action.ActionListener$$Lambda/0x00000000742fc000@3126b007]}{Task{id=94, type='transport', action='cluster:admin/xpack/inference/put', description='', parentTask=unset, startTime=1750854452605, headers={}, startTimeNanos=346986980442}}/org.elasticsearch.action.support.TransportAction$$Lambda/
[truncated]

Issue Reasons:

  • [main] 6 failures in test testRerank (1.9% fail rate in 309 executions)
  • [main] 5 failures in step 8.19.0_part_2_bwc-snapshots (4.3% fail rate in 117 executions)
  • [main] 5 failures in pipeline elasticsearch-pull-request (4.1% fail rate in 121 executions)

Note:
This issue was created using new test triage automation. Please report issues or feedback to es-delivery.

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    :mlMachine learning>test-failureTriaged test failures from CITeam:MLMeta label for the ML teamlow-riskAn open issue or test failure that is a low risk to future releases

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