**Build scan:**
https://gradle-enterprise.elastic.co/s/kpoocm5rmmqv6/tests/:qa:full-cluster-restart:v7.2.0%23upgradedClusterTest/org.elasticsearch.upgrades.FullClusterRestartIT/testSystemIndexMetadataIsUpgraded

**Reproduction line:**
`./gradlew ':qa:full-cluster-restart:v7.2.0#upgradedClusterTest' -Dtests.class="org.elasticsearch.upgrades.FullClusterRestartIT" -Dtests.method="testSystemIndexMetadataIsUpgraded" -Dtests.seed=493EAE6B5BB5BDE4 -Dtests.bwc=true -Dtests.locale=es-EC -Dtests.timezone=Australia/West -Druntime.java=17`

**Applicable branches:**
master, 8.0

**Reproduces locally?:**
Didn't try

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.upgrades.FullClusterRestartIT&tests.test=testSystemIndexMetadataIsUpgraded

**Failure excerpt:**
```
java.lang.AssertionError: 
Expected: is <true>
     but: was <false>

  at __randomizedtesting.SeedInfo.seed([493EAE6B5BB5BDE4:6AF039AC8CE8B14]: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.upgrades.FullClusterRestartIT.lambda$testSystemIndexMetadataIsUpgraded$15(FullClusterRestartIT.java:1630)
  at org.elasticsearch.test.ESTestCase.assertBusy(ESTestCase.java:1053)
  at org.elasticsearch.test.ESTestCase.assertBusy(ESTestCase.java:1026)
  at org.elasticsearch.upgrades.FullClusterRestartIT.testSystemIndexMetadataIsUpgraded(FullClusterRestartIT.java:1619)
  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.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:44)
  at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:45)
  at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.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.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.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.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
  at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.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)

```
qa/full-cluster-restart/src/test/java/org/elasticsearch/upgrades/FullClusterRestartIT.java
body.endObject().endObject().endObject();
        body.endObject();
        request.setJsonEntity(Strings.toString(body));
        Map<String, Object> response = entityAsMap(client().performRequest(request));
        assertMap(
            response,
            matchesMap().extraOk()
                .entry("hits", matchesMap().extraOk().entry("total", Map.of("value", numDocs, "relation", "eq")))
                .entry("aggregations", Map.of("check", Map.of("value", IntStream.range(0, 10).mapToObj(i -> "dim" + i).collect(toList()))))
        );
    }
    public void testNewReplicasTimeSeriesMode() throws Exception {
        assumeTrue("indexing time series indices changed in 8.2.0", getOldClusterVersion().onOrAfter(Version.V_8_2_0));
        if (isRunningAgainstOldCluster()) {
            createTimeSeriesModeIndex(0);
        } else {
            
            final int numReplicas = 1;
            final long startTime = System.currentTimeMillis();
            logger.debug("--> creating [{}] replicas for index [{}]", numReplicas, index);
            Request setNumberOfReplicas = new Request("PUT", "/" + index + "/_settings");
            setNumberOfReplicas.setJsonEntity("{ \"index\": { \"number_of_replicas\" : " + numReplicas + " }}");
            client().performRequest(setNumberOfReplicas);
            ensureGreenLongWait(index);
            logger.debug("--> index [{}] is green, took [{}] ms", index, (System.currentTimeMillis() - startTime));
            Map<String, Object> recoverRsp = entityAsMap(client().performRequest(new Request("GET", "/" + index + "/_recovery")));
            logger.debug("--> recovery status:\n{}", recoverRsp);
            Set<Integer> counts = new HashSet<>();
            for (String node : dataNodes(index, client())) {
                Request search = new Request("GET", "/" + index + "/_search");