[CI] TimeSeriesDataStreamsIT testSearchableSnapshotAction failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #7308 / rhel-9_platform-support-unix
• elasticsearch-pull-request #64585 / part-5

Reproduction Line:

./gradlew ":x-pack:plugin:ilm:qa:multi-node:javaRestTest" --tests "org.elasticsearch.xpack.ilm.TimeSeriesDataStreamsIT.testSearchableSnapshotAction" -Dtests.seed=B64E5CCDB22BF95B -Dtests.locale=cs -Dtests.timezone=Europe/Istanbul -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 testSearchableSnapshotAction (0.3% fail rate in 651 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 testSearchableSnapshotAction (0.3% fail rate in 651 executions)

Build Scans:

• elasticsearch-periodic-platform-support #7308 / rhel-9_platform-support-unix
• elasticsearch-pull-request #64585 / part-5

[elasticsearchmachine]

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

[nielsbauman]

I already encountered this over at #125752 (comment). It's caused by ILM being stuck in the wait-for-index-color step. We're currently still discussing the best way to tackle this issue - I opened #125812 for a different test class but we're discussing if we want to go for a different approach.