[CI] MLModelDeploymentFullClusterRestartIT testDeploymentSurvivesRestart failing

[salvatore-campagna]

Build scan:
https://gradle-enterprise.elastic.co/s/tevkvs6xmgt2m/tests/:x-pack:qa:full-cluster-restart:v8.2.1%23upgradedClusterTest/org.elasticsearch.xpack.restart.MLModelDeploymentFullClusterRestartIT/testDeploymentSurvivesRestart

Reproduction line:
./gradlew ':x-pack:qa:full-cluster-restart:v8.2.1#upgradedClusterTest' -Dtests.class="org.elasticsearch.xpack.restart.MLModelDeploymentFullClusterRestartIT" -Dtests.method="testDeploymentSurvivesRestart" -Dtests.seed=FAA4022B62349CA4 -Dtests.bwc=true -Dtests.locale=de-DE -Dtests.timezone=Australia/Canberra -Druntime.java=17

Applicable branches:
master

Reproduces locally?:
Didn't try

Failure history:
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.xpack.restart.MLModelDeploymentFullClusterRestartIT&tests.test=testDeploymentSurvivesRestart

Failure excerpt:

java.lang.AssertionError: {pipeline_count=0, model_size_stats={model_size_bytes=1630, required_native_memory_bytes=251661500}, model_id=trained-model-full-cluster-restart, deployment_stats={start_time=1651746268402, nodes=[{routing_state={routing_state=failed, reason=Failed to connect to pytorch process for job trained-model-full-cluster-restart}, node={P8afRR34QVu2moGuq5PP8w={transport_address=127.0.0.1:39683, roles=[data, data_cold, data_content, data_frozen, data_hot, data_warm, ingest, master, ml, remote_cluster_client, transform], name=v8.2.1-1, external_id=v8.2.1-1, attributes={upgraded=true, ml.machine_memory=132814569472, xpack.installed=true, testattr=test, ml.max_jvm_size=536870912}, ephemeral_id=RKX1P1qNSF69UYjSsW3sMg}}, throughput_last_minute=0, peak_throughput_per_minute=0}, {routing_state={routing_state=failed, reason=Failed to connect to pytorch process for job trained-model-full-cluster-restart}, node={Ym0gvCk_TmWxjrOsA7O5-A={transport_address=127.0.0.1:37989, roles=[data, data_cold, data_content, data_frozen, data_hot, data_warm, ingest, master, ml, remote_cluster_client, transform], name=v8.2.1-0, external_id=v8.2.1-0, attributes={upgraded=true, ml.machine_memory=132814569472, xpack.installed=true, testattr=test, ml.max_jvm_size=536870912}, ephemeral_id=NZrxtNAWS0mYVyuh1LXHLQ}}, throughput_last_minute=0, peak_throughput_per_minute=0}], allocation_status={target_allocation_count=2, state=starting, allocation_count=0}, model_id=trained-model-full-cluster-restart, state=starting, peak_throughput_per_minute=0}}
Expected: "fully_allocated"
     but: was "starting"

  at __randomizedtesting.SeedInfo.seed([FAA4022B62349CA4:13FF0B4B149A7A84]:0)
  at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
  at org.junit.Assert.assertThat(Assert.java:956)
  at org.elasticsearch.xpack.restart.MLModelDeploymentFullClusterRestartIT.lambda$waitForDeploymentStarted$1(MLModelDeploymentFullClusterRestartIT.java:112)
  at org.elasticsearch.test.ESTestCase.assertBusy(ESTestCase.java:1061)
  at org.elasticsearch.xpack.restart.MLModelDeploymentFullClusterRestartIT.waitForDeploymentStarted(MLModelDeploymentFullClusterRestartIT.java:106)
  at org.elasticsearch.xpack.restart.MLModelDeploymentFullClusterRestartIT.testDeploymentSurvivesRestart(MLModelDeploymentFullClusterRestartIT.java:98)
  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)

[elasticmachine]

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

[davidkyle]

Muted in #86453 and now resolved by #86277

Sorry about the noise