**Build scan:**
https://gradle-enterprise.elastic.co/s/fpiflb6bkwlei/tests/:x-pack:plugin:ilm:qa:multi-node:javaRestTest/org.elasticsearch.xpack.slm.SnapshotLifecycleRestIT/testSLMXpackInfo

**Reproduction line:**
```
./gradlew ':x-pack:plugin:ilm:qa:multi-node:javaRestTest' --tests "org.elasticsearch.xpack.slm.SnapshotLifecycleRestIT.testSLMXpackInfo" -Dtests.seed=4D83982D30C913D6 -Dtests.locale=pt-PT -Dtests.timezone=America/Jujuy -Druntime.java=17
```

**Applicable branches:**
main

**Reproduces locally?:**
No

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.xpack.slm.SnapshotLifecycleRestIT&tests.test=testSLMXpackInfo

**Failure excerpt:**
```
java.lang.AssertionError: failed to execute GET request to /_xpack - got: java.net.ConnectException: Connection refused

  at __randomizedtesting.SeedInfo.seed([4D83982D30C913D6:2B8CA35FAC2063FC]:0)
  at org.junit.Assert.fail(Assert.java:88)
  at org.elasticsearch.xpack.slm.SnapshotLifecycleRestIT.getLocation(SnapshotLifecycleRestIT.java:689)
  at org.elasticsearch.xpack.slm.SnapshotLifecycleRestIT.testSLMXpackInfo(SnapshotLifecycleRestIT.java:547)
  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/main/java/org/elasticsearch/cluster/service/MasterService.java
ClusterState state() {
        return clusterStateSupplier.get();
    }
    public static boolean isMasterUpdateThread() {
        return Thread.currentThread().getName().contains('[' + MASTER_UPDATE_THREAD_NAME + ']');
    }
    public static boolean assertMasterUpdateOrTestThread() {
        return ThreadPool.assertCurrentThreadPool(MASTER_UPDATE_THREAD_NAME);
    }
    public static boolean assertNotMasterUpdateThread(String reason) {
        assert isMasterUpdateThread() == false
            : "Expected current thread [" + Thread.currentThread() + "] to not be the master service thread. Reason: [" + reason + "]";
        return true;
    }
    private <T extends ClusterStateTaskListener> void executeAndPublishBatch(
        final ClusterStateTaskExecutor<T> executor,
        final List<ExecutionResult<T>> executionResults,
        final BatchSummary summary
    ) {
        if (lifecycle.started() == false) {
            logger.debug("processing [{}]: ignoring, master service not started", summary);
            return;
        }
        logger.debug("executing cluster state update for [{}]", summary);
        final ClusterState previousClusterState = state();
        if (previousClusterState.nodes().isLocalNodeElectedMaster() == false && executor.runOnlyOnMaster()) {
            logger.debug("failing [{}]: local node is no longer master", summary);
            for (ExecutionResult<T> executionResult : executionResults) {
                executionResult.onBatchFailure(new NotMasterException("no longer master"));
                executionResult.notifyFailure();