**Build scan:**
https://gradle-enterprise.elastic.co/s/25orcgh4aq75m/tests/:x-pack:qa:rolling-upgrade:v8.2.0%23oldClusterTest/org.elasticsearch.upgrades.TransformSurvivesUpgradeIT/testTransformRollingUpgrade

**Reproduction line:**
`./gradlew ':x-pack:qa:rolling-upgrade:v8.2.0#oldClusterTest' -Dtests.class="org.elasticsearch.upgrades.TransformSurvivesUpgradeIT" -Dtests.method="testTransformRollingUpgrade" -Dtests.seed=1A9920CB87B03F50 -Dtests.bwc=true -Dtests.locale=ru-RU -Dtests.timezone=America/Louisville -Druntime.java=17`

**Applicable branches:**
master

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

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

**Failure excerpt:**
```
java.lang.AssertionError: 
Expected: <330L>
     but: was <5L>

  at __randomizedtesting.SeedInfo.seed([1A9920CB87B03F50:B5E415722CF6EC94]: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.TransformSurvivesUpgradeIT.lambda$createAndStartContinuousTransform$4(TransformSurvivesUpgradeIT.java:134)
  at org.elasticsearch.test.ESTestCase.assertBusy(ESTestCase.java:1068)
  at org.elasticsearch.upgrades.TransformSurvivesUpgradeIT.createAndStartContinuousTransform(TransformSurvivesUpgradeIT.java:132)
  at org.elasticsearch.upgrades.TransformSurvivesUpgradeIT.testTransformRollingUpgrade(TransformSurvivesUpgradeIT.java:90)
  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/qa/rolling-upgrade/src/test/java/org/elasticsearch/upgrades/TransformSurvivesUpgradeIT.java
for (TimeValue bucket : BUCKETS) {
            int docs = randomIntBetween(1, 25);
            putData(CONTINUOUS_TRANSFORM_SOURCE, docs, bucket, ENTITIES);
            totalDocsWrittenSum += docs * ENTITIES.size();
        }
        long totalDocsWritten = totalDocsWrittenSum;
        putTransform(CONTINUOUS_TRANSFORM_ID, transformConfig());
        startTransform(CONTINUOUS_TRANSFORM_ID);
        waitUntilAfterCheckpoint(CONTINUOUS_TRANSFORM_ID, 0L);
        assertBusy(() -> {
            var stateAndStats = getTransformStats(CONTINUOUS_TRANSFORM_ID);
            assertThat(
                ((Integer) XContentMapValues.extractValue("stats.documents_indexed", stateAndStats)).longValue(),
                equalTo(totalDocsWritten)
            );
            assertThat((Integer) XContentMapValues.extractValue("stats.documents_processed", stateAndStats), equalTo(ENTITIES.size()));
            
            
            assertThat(stateAndStats.get("state"), oneOf("started", "indexing"));
        }, 120, TimeUnit.SECONDS);
        
        awaitWrittenIndexerState(CONTINUOUS_TRANSFORM_ID, IndexerState.STARTED.value());
    }
    private static String transformConfig() {
        return """
            {
              "source": {
                "index":""" + "\"" + CONTINUOUS_TRANSFORM_SOURCE + "\"" + """
            },
            "pivot": {