**Build scan:**
https://gradle-enterprise.elastic.co/s/uqchbjzon2u3q/tests/:x-pack:plugin:security:test/org.elasticsearch.xpack.security.authc.RealmsTests/testDomainAssignment

**Reproduction line:**
`./gradlew ':x-pack:plugin:security:test' --tests "org.elasticsearch.xpack.security.authc.RealmsTests.testDomainAssignment" -Dtests.seed=6E76505F7C37CADD -Dtests.locale=en-AU -Dtests.timezone=Europe/Berlin -Druntime.java=17`

**Applicable branches:**
master

**Reproduces locally?:**
Yes

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.xpack.security.authc.RealmsTests&tests.test=testDomainAssignment

**Failure excerpt:**
```
java.lang.AssertionError: 
Expected: <DomainConfig[name=x, memberRealmNames=[realm_1, realm_0, default_file, default_native, realm_2], literalUsername=false, suffix=null]>
     but: was <DomainConfig[name=x, memberRealmNames=[realm_1, realm_0, default_file, default_native, realm_2], literalUsername=true, suffix=xsuffix]>

  at __randomizedtesting.SeedInfo.seed([6E76505F7C37CADD:83F20B658BC244C1]: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.xpack.security.authc.RealmsTests.lambda$testDomainAssignment$13(RealmsTests.java:368)
  at java.util.HashMap.forEach(HashMap.java:1421)
  at org.elasticsearch.xpack.security.authc.RealmsTests.testDomainAssignment(RealmsTests.java:366)
  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:375)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:824)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:475)
  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:375)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:831)
  at java.lang.Thread.run(Thread.java:833)

```
x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/authc/RealmsTests.java
int count = 0;
        while (iterator.hasNext()) {
            realm = iterator.next();
            Integer index = orderToIndex.get(realm.order());
            assertThat(realm.type(), equalTo("type_" + index));
            assertThat(realm.name(), equalTo("realm_" + index));
            assertThat(settings.getAsBoolean("xpack.security.authc.realms.realm_" + index + ".enabled", true), equalTo(Boolean.TRUE));
            count++;
        }
        assertThat(count, equalTo(orderToIndex.size()));
        assertThat(realms.getUnlicensedRealms(), empty());
        
        allowOnlyNativeRealms();
        assertThat(realms.getUnlicensedRealms(), hasSize(orderToIndex.size()));
    }
    @SuppressWarnings("unchecked")
    public void testUsageStats() throws Exception {
        
        Settings.Builder builder = Settings.builder()
            .put("path.home", createTempDir())
            .put("xpack.security.authc.realms.type_0.foo.order", "0")
            .put("xpack.security.authc.realms.type_0.bar.order", "1");
        final boolean fileRealmDisabled = randomDisableRealm(builder, FileRealmSettings.TYPE);
        final boolean nativeRealmDisabled = randomDisableRealm(builder, NativeRealmSettings.TYPE);
        Settings settings = builder.build();
        Environment env = TestEnvironment.newEnvironment(settings);
        Realms realms = new Realms(settings, env, factories, licenseState, threadContext, reservedRealm);
        PlainActionFuture<Map<String, Object>> future = new PlainActionFuture<>();
        realms.usageStats(future);
        Map<String, Object> usageStats = future.get();