[CI] FieldCapabilitiesIT class failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #8409 / almalinux-8_platform-support-unix
• elasticsearch-periodic-platform-support #8307 / sles-15_platform-support-unix

Reproduction Line:

./gradlew ":server:internalClusterTest" --tests "org.elasticsearch.search.fieldcaps.FieldCapabilitiesIT.testNoActiveCopy" -Dtests.seed=4C1F28B7A96B6B13 -Dtests.locale=bg -Dtests.timezone=America/Port_of_Spain -Druntime.java=24

Applicable branches:
8.18

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: All incoming requests on node [node_s3] should have finished. Expected 0 bytes for requests in-flight but got 248 bytes; pending tasks [[]]

Issue Reasons:

• [8.18] 2 failures in class org.elasticsearch.search.fieldcaps.FieldCapabilitiesIT (0.3% fail rate in 572 executions)
• [8.18] 2 failures in pipeline elasticsearch-periodic-platform-support (11.1% fail rate in 18 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)

[elasticsearchmachine]

Pinging @elastic/es-analytical-engine (Team:Analytics)

[dnhatn]

I am closing this because this test has not failed in the past 6 months.