[CI] VectorSimilarityFunctionsIT testSimilarityBetweenConstantVectors {functionName=v_cosine similarityFunction=COSINE} failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #9409 / rhel-8_platform-support-unix
• elasticsearch-pull-request #81075 / part-3

Reproduction Line:

./gradlew ":x-pack:plugin:esql:internalClusterTest" --tests "org.elasticsearch.xpack.esql.vector.VectorSimilarityFunctionsIT.testSimilarityBetweenConstantVectors {functionName=v_cosine similarityFunction=COSINE}" -Dtests.seed=31415556DA459F61 -Dtests.locale=yav-Latn-CM -Dtests.timezone=America/Port_of_Spain -Druntime.java=24

Applicable branches:
main

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: Leftover exchanges ExchangeService{sinks=[ZnvYqdDTTnmt0opYQsqmRQ:293/5]} on node node_s1

Issue Reasons:

• [main] 2 failures in test testSimilarityBetweenConstantVectors {functionName=v_cosine similarityFunction=COSINE} (1.1% fail rate in 178 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 testSimilarityBetweenConstantVectors {functionName=v_cosine similarityFunction=COSINE} (1.1% fail rate in 178 executions)

Build Scans:

• elasticsearch-periodic-platform-support #9409 / rhel-8_platform-support-unix
• elasticsearch-pull-request #81075 / part-3

[elasticsearchmachine]

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

[astefan]

I wasn't able to reproduce this failure, flagging it as low-risk. If you think otherwise, @carlosdelest, please change it. Nevertheless, have a look at this one, a leftover exchange is not something to ignore. Thanks