[CI] ComparisonTests testSparseGaussianDistribution failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #3692 / windows-2016_checkpart1_platform-support-windows
• elasticsearch-periodic #3719 / openjdk22_checkpart1_java-matrix
• elasticsearch-periodic-platform-support #3692 / sles-12_platform-support-unix
• elasticsearch-pull-request #28038 / part-1

Reproduction Line:

gradlew ":libs:elasticsearch-tdigest:test" --tests "org.elasticsearch.tdigest.ComparisonTests.testSparseGaussianDistribution" -Dtests.seed=89A7B3F73558C175 -Dtests.locale=es-US -Dtests.timezone=Pacific/Saipan -Druntime.java=22

Applicable branches:
main

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: expected:<1143.8639781317952> but was:<6267.166728260662>

Issue Reasons:

• [main] 4 failures in test testSparseGaussianDistribution (2.3% fail rate in 177 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 testSparseGaussianDistribution (1.1% fail rate in 175 executions)

Build Scans:

• elasticsearch-periodic-platform-support #3692 / sles-12_platform-support-unix
• elasticsearch-pull-request #28038 / part-1

[elasticsearchmachine]

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

[nik9000]

@ivancea since you are going to have a look at tdigest eventually, could you have a look at this one sometime?

[ivancea]

Tried tor reproduce it, in different commits with different seeds, but no luck.

After #113613 (Last step of TDigest with CB feature), I'll try again. If I don't find anything, I'll unmute and see what happens. If it fails again, at least we'll have a reproducible example, luckily