Build Scans:

• elasticsearch-periodic-platform-support #6432 / windows-2022_checkpart4_platform-support-windows
• elasticsearch-periodic-platform-support #6376 / windows-2022_checkpart4_platform-support-windows
• elasticsearch-periodic-platform-support #6362 / windows-2019_checkpart4_platform-support-windows
• elasticsearch-periodic-platform-support #6355 / ubuntu-2404-aarch64_checkpart4_platform-support-arm
• elasticsearch-periodic-platform-support #6341 / ubuntu-2404-aarch64_checkpart4_platform-support-arm
• elasticsearch-periodic-platform-support #6306 / windows-2019_checkpart4_platform-support-windows
• elasticsearch-periodic-platform-support #6292 / windows-2019_checkpart4_platform-support-windows

Reproduction Line:

gradlew ":x-pack:plugin:security:internalClusterTest" --tests "org.elasticsearch.xpack.security.authc.service.ServiceAccountSingleNodeTests.testAuthenticateWithServiceFileToken" -Dtests.seed=301EC15ABFB89D15 -Dtests.locale=mr-IN -Dtests.timezone=Etc/GMT-10 -Druntime.java=23 

Applicable branches:
8.18

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

org.elasticsearch.action.UnavailableShardsException: at least one search shard for the index [.security-7] is unavailable 

Issue Reasons:

• [8.18] 7 failures in test testAuthenticateWithServiceFileToken (0.9% fail rate in 805 executions)
• [8.18] 2 failures in step windows-2022_checkpart4_platform-support-windows (9.5% fail rate in 21 executions)
• [8.18] 3 failures in step windows-2019_checkpart4_platform-support-windows (15.0% fail rate in 20 executions)
• [8.18] 2 failures in step ubuntu-2404-aarch64_checkpart4_platform-support-arm (10.0% fail rate in 20 executions)
• [8.18] 7 failures in pipeline elasticsearch-periodic-platform-support (33.3% fail rate in 21 executions)

Note:
This issue was created using new test triage automation. Please report issues or feedback to es-delivery.