TokenAuthIntegTests.testRefreshingInvalidatedToken fails on master

[mayya-sharipova]

Failed twice today on master:

Log: https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+multijob+fast+part2/928/console
Build Scans: https://gradle-enterprise.elastic.co/s/h4jvitsdj4ij2

The failure doesn't reproduce for me:

REPRODUCE WITH: ./gradlew :x-pack:plugin:security:test --tests "org.elasticsearch.xpack.security.authc.TokenAuthIntegTests.testRefreshingInvalidatedToken"
-Dtests.seed=93A13A9B7F9E52B9
-Dtests.security.manager=true
-Dtests.locale=sw-UG
-Dtests.timezone=SystemV/PST8
-Dcompiler.java=12
-Druntime.java=11

java.lang.AssertionError: 1 channels still being tracked in HttpChannelTaskHandler while there should be none expected:<0> but was:<1>

[elasticmachine]

Pinging @elastic/es-security

[bizybot]

It failed similarly in https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+g1gc/249/console

java.lang.AssertionError: 1 channels still being tracked in HttpChannelTaskHandler while there should be none expected:<0> but was:<1>

[jkakavas]

This (many methods of TokenAuthIntegTests ) has failed 28 times since August 21st, when @javanna merged his #43332 which added this extra check in ESTestCase . I'll take a look and sync with Luca in case he has an idea what might be tripping this check here