**Build scan:**
https://gradle-enterprise.elastic.co/s/nnsog4mmaw54e/tests/:server:test/org.elasticsearch.indices.ShardLimitValidatorTests/testUnderShardLimit

**Reproduction line:**
```
./gradlew ':server:test' --tests "org.elasticsearch.indices.ShardLimitValidatorTests.testUnderShardLimit" -Dtests.seed=4F392D85D1F6853F -Dtests.locale=es-EC -Dtests.timezone=America/Rankin_Inlet -Druntime.java=17
```

**Applicable branches:**
main

**Reproduces locally?:**
Yes

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.indices.ShardLimitValidatorTests&tests.test=testUnderShardLimit

**Failure excerpt:**
```
java.lang.AssertionError: (No message provided)

  at __randomizedtesting.SeedInfo.seed([4F392D85D1F6853F:AB21D53122DFF287]:0)
  at org.junit.Assert.fail(Assert.java:86)
  at org.junit.Assert.assertTrue(Assert.java:41)
  at org.junit.Assert.assertTrue(Assert.java:52)
  at org.elasticsearch.indices.ShardLimitValidatorTests.testUnderShardLimit(ShardLimitValidatorTests.java:108)
  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:48)
  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/test/java/org/elasticsearch/indices/ShardLimitValidatorTests.java
return new ShardLimitValidator(limitOnlySettings, clusterService);
    }
    /**
     * Creates a {@link ShardLimitValidator} for testing with the given setting and a mocked cluster service.
     *
     * @param maxShardsPerNode the value to use for the max shards per node setting
     * @return a test instance
     */
    public static ShardLimitValidator createTestShardLimitService(int maxShardsPerNode) {
        
        ClusterService clusterService = mock(ClusterService.class);
        Settings limitOnlySettings = Settings.builder().put(SETTING_CLUSTER_MAX_SHARDS_PER_NODE.getKey(), maxShardsPerNode).build();
        when(clusterService.getClusterSettings()).thenReturn(
            new ClusterSettings(limitOnlySettings, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS)
        );
        return new ShardLimitValidator(limitOnlySettings, clusterService);
    }
    /**
     * Creates a {@link ShardLimitValidator} for testing with the given setting and a given cluster service.
     *
     * @param maxShardsPerNode the value to use for the max shards per node setting
     * @param clusterService   the cluster service to use
     * @return a test instance
     */
    public static ShardLimitValidator createTestShardLimitService(int maxShardsPerNode, ClusterService clusterService) {
        Settings limitOnlySettings = Settings.builder().put(SETTING_CLUSTER_MAX_SHARDS_PER_NODE.getKey(), maxShardsPerNode).build();
        return new ShardLimitValidator(limitOnlySettings, clusterService);
    }
}