[CI] DataStreamLifecycleDownsampleDisruptionIT testDataStreamLifecycleDownsampleRollingRestart failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #9416 / ubuntu-2404-aarch64_checkpart2_platform-support-arm
• elasticsearch-intake #25650 / part2

Reproduction Line:

./gradlew ":x-pack:plugin:downsample:internalClusterTest" --tests "org.elasticsearch.xpack.downsample.DataStreamLifecycleDownsampleDisruptionIT.testDataStreamLifecycleDownsampleRollingRestart" -Dtests.seed=419D05FAA63230A1 -Dtests.locale=sd-Arab-PK -Dtests.timezone=America/Santarem -Druntime.java=24

Applicable branches:
main

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: null

Issue Reasons:

• [main] 2 failures in test testDataStreamLifecycleDownsampleRollingRestart (0.9% fail rate in 217 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 testDataStreamLifecycleDownsampleRollingRestart (0.9% fail rate in 217 executions)

Build Scans:

• elasticsearch-periodic-platform-support #9416 / ubuntu-2404-aarch64_checkpart2_platform-support-arm
• elasticsearch-intake #25650 / part2

[elasticsearchmachine]

Pinging @elastic/es-data-management (Team:Data Management)

[nielsbauman]

I don't know if I'll have time to look into this anytime soon, but I'm linking #123769 and its corresponding PR #125478 as we've seen this before. In fact, multiple issues have been opened over time.

[nielsbauman]

FWIW, looking at recent test failures, the main failure still seems to be java.lang.AssertionError: timed out waiting for green state, and not this java.lang.AssertionError: null, which might be a one-off failure.