[CI] NodeShutdownIT testStalledShardMigrationProperlyDetected failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #4549 / ubuntu-2004-aarch64_checkpart5_platform-support-arm
• elasticsearch-pull-request #38590 / part-5
• elasticsearch-pull-request #38383 / part-5

Reproduction Line:

./gradlew ":x-pack:plugin:shutdown:qa:multi-node:javaRestTest" --tests "org.elasticsearch.xpack.shutdown.NodeShutdownIT.testStalledShardMigrationProperlyDetected" -Dtests.seed=337D4ECD2571A1FA -Dtests.locale=hr-HR -Dtests.timezone=Europe/Kyiv -Druntime.java=22

Applicable branches: main

Reproduces locally?: N/A

Failure History: See dashboard&_a=(controlGroupState:(initialChildControlState:('0c0c9cb8-ccd2-45c6-9b13-96bac4abc542':(dataViewId:fbbdc689-be23-4b3d-8057-aa402e9ed0c5,fieldName:task.keyword,order:0,selectedOptions:!(),title:'GradleTask',type:optionsListControl),'4e6ad9d6-6fdc-4fcc-bf1a-aa6ca79e0850':(dataViewId:fbbdc689-be23-4b3d-8057-aa402e9ed0c5,fieldName:className.keyword,order:1,selectedOptions:!(org.elasticsearch.xpack.shutdown.NodeShutdownIT),title:'Suite',type:optionsListControl),'144933da-5c1b-4257-a969-7f43455a7901':(dataViewId:fbbdc689-be23-4b3d-8057-aa402e9ed0c5,fieldName:name.keyword,order:2,selectedOptions:!(testStalledShardMigrationProperlyDetected),title:'Test',type:optionsListControl)))))

Failure Message:

java.lang.AssertionError: 
Expected: "COMPLETE"
     but: was "IN_PROGRESS"

Issue Reasons:

• [main] 3 failures in test testStalledShardMigrationProperlyDetected (1.5% fail rate in 204 executions)
• [main] 2 failures in step part-5 (2.1% fail rate in 96 executions)
• [main] 2 failures in pipeline elasticsearch-pull-request (2.1% fail rate in 96 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] 3 failures in test testStalledShardMigrationProperlyDetected (1.5% fail rate in 204 executions)
• [main] 2 failures in step part-5 (2.1% fail rate in 96 executions)
• [main] 2 failures in pipeline elasticsearch-pull-request (2.1% fail rate in 96 executions)

Build Scans:

• elasticsearch-periodic-platform-support #4549 / ubuntu-2004-aarch64_checkpart5_platform-support-arm
• elasticsearch-pull-request #38590 / part-5
• elasticsearch-pull-request #38383 / part-5

[elasticsearchmachine]

Pinging @elastic/es-core-infra (Team:Core/Infra)

[thecoop]

The PR failures look incidental. The aarch failure looks like a timeout, possibly due to slowness. Needs more investigation, but not a blocker