[CI] ValuesBytesRefAggregatorFunctionTests testSimpleSmallInput failure

[cbuescher]

CI Link

https://gradle-enterprise.elastic.co/s/vj3kky5loieam

Repro line

./gradlew ":x-pack:plugin:esql:compute:test" --tests "org.elasticsearch.compute.aggregation.ValuesBytesRefAggregatorFunctionTests.testSimpleSmallInput" -Dtests.seed=1A2C9AF1BC59A0E7:992BD534F5C59620 -Dtests.iters=10

Does it reproduce?

Yes

Applicable branches

main

Failure history

No response

Failure excerpt

TopBytesRefAggregatorFunctionTests > testSimpleSmallInput FAILED
    java.lang.ClassCastException: class org.apache.lucene.util.BytesRef cannot be cast to class java.util.List (org.apache.lucene.util.BytesRef is in unnamed module of loader 'app'; java.util.List is in module java.base of loader 'bootstrap')
        at __randomizedtesting.SeedInfo.seed([1A2C9AF1BC59A0E7:992BD534F5C59620]:0)
        at org.elasticsearch.compute.aggregation.AbstractTopBytesRefAggregatorFunctionTests.assertSimpleOutput(AbstractTopBytesRefAggregatorFunctionTests.java:36)
        at org.elasticsearch.compute.aggregation.AggregatorFunctionTestCase.assertSimpleOutput(AggregatorFunctionTestCase.java:113)
        at org.elasticsearch.compute.test.OperatorTestCase.assertSimple(OperatorTestCase.java:235)
        at org.elasticsearch.compute.test.OperatorTestCase.testSimpleSmallInput(OperatorTestCase.java:72)

[elasticsearchmachine]

Pinging @elastic/es-analytical-engine (Team:Analytics)

[cbuescher]

Also failed on one of my PRs at https://gradle-enterprise.elastic.co/s/g4sqhpkk2zd3q/tests/overview?outcome=FAILED along with several other tests with the same method failiing.

[fang-xing-esql]

Could be a duplicate of #136945, @afoucret FYI.