[CI] MlDailyMaintenanceServiceTests testBothTasksAreTriggered_DeleteJobsTaskFails failing

[mark-vieira]

This has failed in CI twice now but it didn't reproduce locally for me.

Build scan:
https://gradle-enterprise.elastic.co/s/chbv2cwfugedi/tests/:x-pack:plugin:ml:test/org.elasticsearch.xpack.ml.MlDailyMaintenanceServiceTests/testBothTasksAreTriggered_DeleteJobsTaskFails

Reproduction line:
./gradlew ':x-pack:plugin:ml:test' --tests "org.elasticsearch.xpack.ml.MlDailyMaintenanceServiceTests.testBothTasksAreTriggered_DeleteJobsTaskFails" -Dtests.seed=31A7B9D0D35C27C7 -Dtests.locale=fr-CA -Dtests.timezone=US/East-Indiana -Druntime.java=8

Applicable branches:
7.16

Reproduces locally?:
No

Failure history:
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.xpack.ml.MlDailyMaintenanceServiceTests&tests.test=testBothTasksAreTriggered_DeleteJobsTaskFails

Failure excerpt:

org.mockito.exceptions.verification.TooManyActualInvocations: 
client.threadPool();
Wanted 2 times:
-> at org.elasticsearch.xpack.ml.MlDailyMaintenanceServiceTests.assertThatBothTasksAreTriggered(MlDailyMaintenanceServiceTests.java:152)
But was 3 times:
-> at org.elasticsearch.xpack.core.ClientHelper.executeAsyncWithOrigin(ClientHelper.java:145)
-> at org.elasticsearch.xpack.core.ClientHelper.executeAsyncWithOrigin(ClientHelper.java:145)
-> at org.elasticsearch.xpack.core.ClientHelper.executeAsyncWithOrigin(ClientHelper.java:145)


  at __randomizedtesting.SeedInfo.seed([31A7B9D0D35C27C7:EC6C219CAE3301B]:0)
  at org.elasticsearch.xpack.ml.MlDailyMaintenanceServiceTests.assertThatBothTasksAreTriggered(MlDailyMaintenanceServiceTests.java:152)
  at org.elasticsearch.xpack.ml.MlDailyMaintenanceServiceTests.testBothTasksAreTriggered_DeleteJobsTaskFails(MlDailyMaintenanceServiceTests.java:128)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-2)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  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)

[davidkyle]

Failed again on 7.16:

https://gradle-enterprise.elastic.co/s/edfq5nz2i7ad6/tests/:x-pack:plugin:ml:test/org.elasticsearch.xpack.ml.MlDailyMaintenanceServiceTests/testBothTasksAreTriggered_DeleteExpiredDataTaskFails?top-execution=1

org.mockito.exceptions.verification.NoInteractionsWanted: 
No interactions wanted here:
-> at org.elasticsearch.xpack.ml.MlDailyMaintenanceServiceTests.assertThatBothTasksAreTriggered(MlDailyMaintenanceServiceTests.java:157)
But found this interaction on mock 'client':
-> at org.elasticsearch.xpack.core.ClientHelper.executeAsyncWithOrigin(ClientHelper.java:145)
***
For your reference, here is the list of all invocations ([?] - means unverified).
1. -> at org.elasticsearch.xpack.core.ClientHelper.executeAsyncWithOrigin(ClientHelper.java:145)
2. -> at org.elasticsearch.xpack.core.ClientHelper.executeAsyncWithOrigin(ClientHelper.java:148)
3. -> at org.elasticsearch.xpack.core.ClientHelper.executeAsyncWithOrigin(ClientHelper.java:145)
4. -> at org.elasticsearch.xpack.core.ClientHelper.executeAsyncWithOrigin(ClientHelper.java:148)
5. -> at org.elasticsearch.xpack.core.ClientHelper.executeAsyncWithOrigin(ClientHelper.java:145)
6. -> at org.elasticsearch.xpack.core.ClientHelper.executeAsyncWithOrigin(ClientHelper.java:148)
7. [?]-> at org.elasticsearch.xpack.core.ClientHelper.executeAsyncWithOrigin(ClientHelper.java:145)
8. -> at org.elasticsearch.xpack.core.ClientHelper.executeAsyncWithOrigin(ClientHelper.java:148)

	at __randomizedtesting.SeedInfo.seed([E753C8F18FE0601C:4F42E7E6B5DF53D]:0)
	at org.elasticsearch.xpack.ml.MlDailyMaintenanceServiceTests.assertThatBothTasksAreTriggered(MlDailyMaintenanceServiceTests.java:157)
	at org.elasticsearch.xpack.ml.MlDailyMaintenanceServiceTests.testBothTasksAreTriggered_DeleteExpiredDataTaskFails(MlDailyMaintenanceServiceTests.java:115)