[CI] FieldSortIT testFieldAlias failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic #8859 / single-processor-node-tests
• elasticsearch-periodic #8847 / concurrent-search-tests

Reproduction Line:

./gradlew ":server:internalClusterTest" --tests "org.elasticsearch.search.sort.FieldSortIT.testFieldAlias" -Dtests.seed=370AC8E523CB557 -Dtests.configure_test_clusters_with_one_processor=true -Dtests.locale=bho-IN -Dtests.timezone=NET -Druntime.java=24

Applicable branches:
main

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: 
Expected: an empty collection
     but: <[LEAK: resource was not cleaned up before it was garbage-collected.
Recent access records: 
#1:
	in [elasticsearch[node_s1][search][T#1]][testSortMixedFieldTypes]
	org.elasticsearch.action.ActionListener.respondAndRelease(ActionListener.java:388)
	org.elasticsearch.action.ActionRunnable$3.accept(ActionRunnable.java:79)
	org.elasticsearch.action.ActionRunnable$3.accept(ActionRunnable.java:76)
	org.elasticsearch.action.ActionRunnable$4.doRun(ActionRunnable.java:101)
	org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:27)
	org.elasticsearch.common.util.concurrent.TimedRunnable.doRun(TimedRunnable.java:35)
	org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:1044)
	org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:27)
	java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor
[truncated]

Issue Reasons:

• [main] 2 failures in test testFieldAlias (1.4% fail rate in 148 executions)
• [main] 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]

Pinging @elastic/es-search-foundations (Team:Search Foundations)