**Build scan:**
https://gradle-enterprise.elastic.co/s/sjbgu4zjbxhmo/tests/:server:internalClusterTest/org.elasticsearch.discovery.StableMasterDisruptionIT/testRepeatedNullMasterRecognizedAsGreenIfMasterDoesNotKnowItIsUnstable

**Reproduction line:**
`./gradlew ':server:internalClusterTest' --tests "org.elasticsearch.discovery.StableMasterDisruptionIT.testRepeatedNullMasterRecognizedAsGreenIfMasterDoesNotKnowItIsUnstable" -Dtests.seed=5F13EFF29906BB53 -Dtests.locale=en-IE -Dtests.timezone=Australia/South -Druntime.java=17`

**Applicable branches:**
main

**Reproduces locally?:**
No

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.discovery.StableMasterDisruptionIT&tests.test=testRepeatedNullMasterRecognizedAsGreenIfMasterDoesNotKnowItIsUnstable

**Failure excerpt:**
```
java.lang.AssertionError: {"status":"yellow","cluster_name":"TEST-TEST_WORKER_VM=[226]-CLUSTER_SEED=[7924964341647394941]-HASH=[F908511566]-cluster","indicators":{"master_is_stable":{"status":"yellow","symptom":"The cluster's master has alternated between [{node_t0}{cX_Eos3KTJi7ejP3Ciy7Gw}{ZPwl9rtsTlmdxJanBAD2ew}{node_t0}{127.0.0.1}{127.0.0.1:20111}{m}] and no master multiple times in the last 30m","details":{"current_master":{"node_id":"cX_Eos3KTJi7ejP3Ciy7Gw","name":"node_t0"},"recent_masters":[{"node_id":"cX_Eos3KTJi7ejP3Ciy7Gw","name":"node_t0"},{"node_id":"cX_Eos3KTJi7ejP3Ciy7Gw","name":"node_t0"},{"node_id":"cX_Eos3KTJi7ejP3Ciy7Gw","name":"node_t0"}],"exception_fetching_history":{"message":"[node_t0][127.0.0.1:20111][internal:cluster/master_history/get] request_id [25] timed out after [10044ms]","stack_trace":"org.elasticsearch.transport.ReceiveTimeoutTransportException: [node_t0][127.0.0.1:20111][internal:cluster/master_history/get] request_id [25] timed out after [10044ms]\n"}},"impacts":[{"severity":1,"description":"The cluster cannot create, delete, or rebalance indices, and cannot insert or update documents.","impact_areas":["ingest"]},{"severity":1,"description":"Scheduled tasks such as Watcher, ILM, and SLM will not work. The _cat APIs will not work.","impact_areas":["deployment_management"]},{"severity":3,"description":"Snapshot and restore will not work. Searchable snapshots cannot be mounted.","impact_areas":["backup"]}],"diagnosis":[{"cause":"The Elasticsearch cluster does not have a stable master node.","action":"Get help at https://ela.st/getting-help","help_url":"https://ela.st/getting-help"}]},"repository_integrity":{"status":"unknown","symptom":"Could not determine health status. Check details on critical issues preventing the health status from reporting.","details":{"reasons":{"master_is_stable":"yellow"}}},"shards_availability":{"status":"unknown","symptom":"Could not determine health status. Check details on critical issues preventing the health status from reporting.","details":{"reasons":{"master_is_stable":"yellow"}}}}}
Expected: <GREEN>
     but: was <YELLOW>

  at __randomizedtesting.SeedInfo.seed([5F13EFF29906BB53:B4381153A289DA9A]:0)
  at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
  at org.junit.Assert.assertThat(Assert.java:956)
  at org.elasticsearch.discovery.StableMasterDisruptionIT.lambda$assertMasterStability$0(StableMasterDisruptionIT.java:140)
  at org.elasticsearch.test.ESTestCase.assertBusy(ESTestCase.java:1104)
  at org.elasticsearch.test.ESTestCase.assertBusy(ESTestCase.java:1077)
  at org.elasticsearch.discovery.StableMasterDisruptionIT.assertMasterStability(StableMasterDisruptionIT.java:137)
  at org.elasticsearch.discovery.StableMasterDisruptionIT.assertGreenMasterStability(StableMasterDisruptionIT.java:133)
  at org.elasticsearch.discovery.StableMasterDisruptionIT.testRepeatedNullMasterRecognizedAsGreenIfMasterDoesNotKnowItIsUnstable(StableMasterDisruptionIT.java:474)
  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/cluster/coordination/CoordinationDiagnosticsService.java
};
    }
    /**
     * This method returns quickly, but in the background schedules to query the remote masterEligibleNode's cluster diagnostics in 10
     * seconds unless cancel() is called on the Cancellable that this method returns.
     * @param masterEligibleNode The masterEligibleNode to poll for cluster diagnostics. This masterEligibleNode can be null in the case
     *                           when there are not yet any master-eligible nodes known to this masterEligibleNode's PeerFinder.
     * @param responseConsumer The consumer of the cluster diagnostics for the masterEligibleNode, or the exception encountered while
     *                         contacting it
     * @return A Cancellable for the task that is scheduled to fetch cluster diagnostics
     */
    private Scheduler.Cancellable fetchCoordinationDiagnostics(
        @Nullable DiscoveryNode masterEligibleNode,
        Consumer<RemoteMasterHealthResult> responseConsumer
    ) {
        return sendTransportRequest(
            masterEligibleNode,
            responseConsumer,
            CoordinationDiagnosticsAction.INSTANCE,
            new CoordinationDiagnosticsAction.Request(true),
            (response, e) -> {
                assert response != null || e != null : "a response or an exception must be provided";
                if (response != null) {
                    return new RemoteMasterHealthResult(masterEligibleNode, response.getCoordinationDiagnosticsResult(), null);
                } else {
                    return new RemoteMasterHealthResult(masterEligibleNode, null, e);
                }
            }
        );
    }