[CI] DatafeedJobsIT testStopAndRestartCompositeDatafeed failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic #5850 / openjdk17_checkpart4_java-matrix
• elasticsearch-pull-request #50450 / part-4
• elasticsearch-periodic #5840 / openjdk21_checkpart4_java-matrix

Reproduction Line:

./gradlew ":x-pack:plugin:ml:qa:native-multi-node-tests:javaRestTest" --tests "org.elasticsearch.xpack.ml.integration.DatafeedJobsIT.testStopAndRestartCompositeDatafeed" -Dtests.seed=1F2791DA84F6039 -Dtests.locale=dyo -Dtests.timezone=Asia/Saigon -Druntime.java=17

Applicable branches:
8.x

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

org.elasticsearch.tasks.TaskCancelledException: Task was cancelled

Issue Reasons:

• [8.x] 3 failures in test testStopAndRestartCompositeDatafeed (2.1% fail rate in 144 executions)
• [8.x] 2 failures in pipeline elasticsearch-periodic (50.0% fail rate in 4 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 8.x

Mute Reasons:

• [8.x] 3 failures in test testStopAndRestartCompositeDatafeed (2.1% fail rate in 144 executions)
• [8.x] 2 failures in pipeline elasticsearch-periodic (50.0% fail rate in 4 executions)

Build Scans:

• elasticsearch-periodic #5850 / openjdk17_checkpart4_java-matrix
• elasticsearch-pull-request #50450 / part-4
• elasticsearch-periodic #5840 / openjdk21_checkpart4_java-matrix

[elasticsearchmachine]

Pinging @elastic/ml-core (Team:ML)