[CI] RejectionActionIT testSimulatedSearchRejectionLoad failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #7614 / ubuntu-2204_platform-support-unix
• elasticsearch-pull-request #67348 / part-1

Reproduction Line:

./gradlew ":server:internalClusterTest" --tests "org.elasticsearch.action.RejectionActionIT.testSimulatedSearchRejectionLoad" -Dtests.seed=51E1B1F07CB9F3EC -Dtests.locale=en-KN -Dtests.timezone=America/Creston -Druntime.java=24

Applicable branches:
8.x

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: There are still [1] in-flight contexts. The first one's creation site is listed as the cause of this exception.

Issue Reasons:

• [8.x] 2 failures in test testSimulatedSearchRejectionLoad (1.4% fail rate in 142 executions)

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

[elasticsearchmachine]

Pinging @elastic/es-delivery (Team:Delivery)

[elasticsearchmachine]

This has been muted on branch main

Mute Reasons:

• [main] 9 failures in test testSimulatedSearchRejectionLoad (3.1% fail rate in 290 executions)
• [main] 2 failures in step concurrent-search-tests (40.0% fail rate in 5 executions)
• [main] 2 failures in pipeline elasticsearch-periodic-platform-support (28.6% fail rate in 7 executions)
• [main] 2 failures in pipeline elasticsearch-pull-request (2.9% fail rate in 70 executions)
• [main] 3 failures in pipeline elasticsearch-periodic (42.9% fail rate in 7 executions)

Build Scans:

• elasticsearch-periodic-platform-support #7392 / almalinux-9_platform-support-unix
• elasticsearch-pull-request #65714 / part-1
• elasticsearch-pull-request #65606 / part-1-fips
• elasticsearch-periodic #7349 / openjdk24_entitlements_false_checkpart1_java-matrix
• elasticsearch-periodic #7349 / concurrent-search-tests
• elasticsearch-periodic-platform-support #7364 / rocky-8_platform-support-unix
• elasticsearch-periodic #7328 / openjdk23_entitlements_false_checkpart1_java-matrix
• elasticsearch-periodic #7328 / concurrent-search-tests
• elasticsearch-periodic #7321 / openjdk21_checkpart1_java-fips-matrix

[elasticsearchmachine]

This has been muted on branch 8.x

Mute Reasons:

• [8.x] 2 failures in test testSimulatedSearchRejectionLoad (1.4% fail rate in 142 executions)

Build Scans:

• elasticsearch-periodic-platform-support #7614 / ubuntu-2204_platform-support-unix
• elasticsearch-pull-request #67348 / part-1