[BUG] SearchWeightedRoutingIT.testStrictWeightedRoutingWithCustomString_FailOpenEnabled is flaky

[peteralfonsi]

Describe the bug

The test fails after failing to connect to a node.

Related component

Other

To Reproduce

./gradlew ':server:internalClusterTest' --tests "org.opensearch.search.SearchWeightedRoutingIT.testStrictWeightedRoutingWithCustomString_FailOpenEnabled" -Dtests.seed=82A1FB3388D19A93 -Dtests.security.manager=true -Dtests.jvm.argline="-XX:TieredStopAtLevel=1 -XX:ReservedCodeCacheSize=64m" -Dtests.locale=nl -Dtests.timezone=Asia/Tokyo -Druntime.java=21

Expected behavior

The test should always pass.

Additional Details

CI link with test output: https://build.ci.opensearch.org/job/gradle-check/35095/testReport/junit/org.opensearch.search/SearchWeightedRoutingIT/testStrictWeightedRoutingWithCustomString_FailOpenEnabled/

[andrross]

[Triage - attendees 1 2 3 4 5 6]
@peteralfonsi Thanks for filing.