[CI] UpgradeClusterClientYamlTestSuiteIT test {p0=upgraded_cluster/30_ml_jobs_crud/Test open old jobs} failing

[benwtrent]

This is a weird one. Looking at the logs:

[2021-08-16T16:47:24,994][INFO ][o.e.x.c.m.j.p.ElasticsearchMappings] [v7.6.1-0] Mappings for [.ml-anomalies-shared] are outdated [7.6.1], updating it[7.14.1].
[2021-08-16T16:47:25,116][INFO ][o.e.x.m.j.p.a.AutodetectProcessManager] [v7.6.1-0] Opening job [mixed-cluster-job]
[2021-08-16T16:47:25,123][INFO ][o.e.x.c.m.j.p.ElasticsearchMappings] [v7.6.1-0] Mappings for [.ml-annotations-6] are outdated [7.6.1], updating it[7.14.1].
[2021-08-16T16:47:25,169][INFO ][o.e.x.c.m.u.MlIndexAndAlias] [v7.6.1-0] About to create first concrete index [.ml-state-000001] with alias [.ml-state-write]
[2021-08-16T16:47:25,251][INFO ][o.e.x.c.m.u.MlIndexAndAlias] [v7.6.1-0] About to move write alias [.ml-state-write] from index [.ml-state] to index [.ml-state-000001]
[2021-08-16T16:47:25,857][INFO ][o.e.x.m.j.p.a.AutodetectProcessManager] [v7.6.1-0] [mixed-cluster-job] Loading model snapshot [N/A], job latest_record_timestamp [N/A]
[2021-08-16T16:47:25,881][WARN ][o.e.x.c.c.n.AbstractAuditor] [v7.6.1-0] Error putting latest template [.ml-notifications-000002]
[2021-08-16T16:47:26,279][INFO ][o.e.x.m.p.l.CppLogMessageHandler] [v7.6.1-0] [mixed-cluster-job] [autodetect/44290] [CResourceMonitor.cc@77] Setting model memory limit to 50 MB
[2021-08-16T16:47:26,332][INFO ][o.e.x.m.j.p.a.AutodetectProcessManager] [v7.6.1-0] Successfully set job state to [opened] for job [mixed-cluster-job]
[2021-08-16T16:47:26,448][INFO ][o.e.x.m.j.p.a.AutodetectProcessManager] [v7.6.1-0] Closing job [mixed-cluster-job], because [close job (api)]
[2021-08-16T16:47:26,451][INFO ][o.e.x.m.p.l.CppLogMessageHandler] [v7.6.1-0] [mixed-cluster-job] [autodetect/44290] [CCmdSkeleton.cc@61] Handled 2 records
[2021-08-16T16:47:26,451][INFO ][o.e.x.m.p.l.CppLogMessageHandler] [v7.6.1-0] [mixed-cluster-job] [autodetect/44290] [CAnomalyJob.cc@1578] Pruning all models
[2021-08-16T16:47:26,493][INFO ][o.e.x.m.p.AbstractNativeProcess] [v7.6.1-0] [mixed-cluster-job] State output finished

It seems like the .ml-state-write index was created correctly and there are no logs indicating that it didn't get created :/

Build scan:
https://gradle-enterprise.elastic.co/s/kcusy7kfkaewi/tests/:x-pack:qa:rolling-upgrade:v7.6.1%23upgradedClusterTest/org.elasticsearch.upgrades.UpgradeClusterClientYamlTestSuiteIT/test%20%7Bp0=upgraded_cluster%2F30_ml_jobs_crud%2FTest%20open%20old%20jobs%7D

Reproduction line:
./gradlew ':x-pack:qa:rolling-upgrade:v7.6.1#upgradedClusterTest' -Dtests.class="org.elasticsearch.upgrades.UpgradeClusterClientYamlTestSuiteIT" -Dtests.method="test {p0=upgraded_cluster/30_ml_jobs_crud/Test open old jobs}" -Dtests.seed=C57E7CC36CE68176 -Dtests.bwc=true -Dtests.locale=de-GR -Dtests.timezone=Cuba -Druntime.java=8

Applicable branches:
7.14

Reproduces locally?:
No

Failure history:
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.upgrades.UpgradeClusterClientYamlTestSuiteIT&tests.test=test%20%7Bp0%3Dupgraded_cluster/30_ml_jobs_crud/Test%20open%20old%20jobs%7D

Failure excerpt:

java.lang.AssertionError: Failure at [upgraded_cluster/30_ml_jobs_crud:110]: field [] doesn't have a true value
Expected: not a string equal to "false" ignoring case
     but: was "false"

  at __randomizedtesting.SeedInfo.seed([C57E7CC36CE68176:4D2A4319C21AEC8E]:0)
  at org.elasticsearch.test.rest.yaml.ESClientYamlSuiteTestCase.executeSection(ESClientYamlSuiteTestCase.java:462)
  at org.elasticsearch.test.rest.yaml.ESClientYamlSuiteTestCase.test(ESClientYamlSuiteTestCase.java:439)
  at sun.reflect.GeneratedMethodAccessor23.invoke(null:-1)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1750)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:938)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:974)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:988)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
  at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
  at org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
  at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
  at org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:817)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:468)
  at com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:947)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:832)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:883)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:894)
  at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
  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 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.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
  at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
  at org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
  at java.lang.Thread.run(Thread.java:748)

  Caused by: java.lang.AssertionError: field [] doesn't have a true value
  Expected: not a string equal to "false" ignoring case
       but: was "false"

    at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
    at org.junit.Assert.assertThat(Assert.java:956)
    at org.elasticsearch.test.rest.yaml.section.IsTrueAssertion.doAssert(IsTrueAssertion.java:47)
    at org.elasticsearch.test.rest.yaml.section.Assertion.execute(Assertion.java:65)
    at org.elasticsearch.test.rest.yaml.ESClientYamlSuiteTestCase.executeSection(ESClientYamlSuiteTestCase.java:455)
    at org.elasticsearch.test.rest.yaml.ESClientYamlSuiteTestCase.test(ESClientYamlSuiteTestCase.java:439)
    at sun.reflect.GeneratedMethodAccessor23.invoke(null:-1)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1750)
    at com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:938)
    at com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:974)
    at com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:988)
    at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
    at org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
    at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
    at org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
    at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
    at org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
    at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
    at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
    at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:817)
    at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:468)
    at com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:947)
    at com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:832)
    at com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:883)
    at com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:894)
    at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
    at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
    at org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
    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 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.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
    at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
    at org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
    at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
    at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
    at java.lang.Thread.run(Thread.java:748)

[elasticmachine]

Pinging @elastic/ml-core (Team:ML)

[benwtrent]

Related: #79636

[benwtrent]

PR: #79731 probably fixes this issue. Need to reopen if continues to fail for similar reasons.