(Not 100% sure who owns threadpools, whether it's core/infra or the distributed team)

**Build scan:**
https://gradle-enterprise.elastic.co/s/6bnqyucslkqwu/tests/:server:test/org.elasticsearch.threadpool.ScalingThreadPoolTests/testScalingThreadPoolConfiguration

**Reproduction line:**
```
./gradlew ':server:test' --tests "org.elasticsearch.threadpool.ScalingThreadPoolTests.testScalingThreadPoolConfiguration" -Dtests.seed=723A4CB306D59946 -Dtests.locale=zh-SG -Dtests.timezone=Asia/Aqtau -Druntime.java=17
```

**Applicable branches:**
main

**Reproduces locally?:**
Yes

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.threadpool.ScalingThreadPoolTests&tests.test=testScalingThreadPoolConfiguration

**Failure excerpt:**
```
java.lang.AssertionError: 
Expected: <10>
     but: was <5>

  at __randomizedtesting.SeedInfo.seed([723A4CB306D59946:5FBC453C30C07715]:0)
  at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
  at org.junit.Assert.assertThat(Assert.java:956)
  at org.junit.Assert.assertThat(Assert.java:923)
  at org.elasticsearch.threadpool.ScalingThreadPoolTests.lambda$testScalingThreadPoolConfiguration$0(ScalingThreadPoolTests.java:105)
  at org.elasticsearch.threadpool.ScalingThreadPoolTests.runScalingThreadPoolTest(ScalingThreadPoolTests.java:433)
  at org.elasticsearch.threadpool.ScalingThreadPoolTests.testScalingThreadPoolConfiguration(ScalingThreadPoolTests.java:88)
  at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-2)
  at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
  at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:568)
  at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1758)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:946)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:982)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:996)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:44)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.tests.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:45)
  at org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:843)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:490)
  at com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:955)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:840)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:891)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:902)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:38)
  at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
  at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.tests.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:47)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:850)
  at java.lang.Thread.run(Thread.java:833)

```
server/src/main/java/org/elasticsearch/threadpool/ThreadPool.java
"timer thread slept for [{}/{}ms] on absolute clock which is above the warn threshold of [{}ms]",
                        delta,
                        deltaMillis,
                        thresholdMillis
                    );
                } else if (deltaMillis < 0) {
                    final TimeValue delta = TimeValue.timeValueMillis(-deltaMillis);
                    logger.warn("absolute clock went backwards by [{}/{}ms] while timer thread was sleeping", delta, -deltaMillis);
                }
                final long deltaNanos = newRelativeNanos - relativeNanos;
                if (deltaNanos > thresholdNanos) {
                    final TimeValue delta = TimeValue.timeValueNanos(deltaNanos);
                    logger.warn(
                        "timer thread slept for [{}/{}ns] on relative clock which is above the warn threshold of [{}ms]",
                        delta,
                        deltaNanos,
                        thresholdMillis
                    );
                } else if (deltaNanos < 0) {
                    final TimeValue delta = TimeValue.timeValueNanos(-deltaNanos);
                    logger.error("relative clock went backwards by [{}/{}ns] while timer thread was sleeping", delta, -deltaNanos);
                    assert false : "System::nanoTime time should be monotonic";
                }
            } finally {
                absoluteMillis = newAbsoluteMillis;
                relativeNanos = newRelativeNanos;
            }
        }
    }
    static class ExecutorHolder {