Flaky tests

[ylwu-amzn]

https://github.com/opensearch-project/ml-commons/runs/5474932230?check_suite_focus=true

REPRODUCE WITH: ./gradlew ':opensearch-ml-plugin:test' --tests "org.opensearch.ml.action.training.TrainingITTests.testTrainingWithEmptyDataset" -Dtests.seed=9E228763DA6EA131 -Dtests.security.manager=false -Dtests.locale=th -Dtests.timezone=Pacific/Niue -Druntime.java=11

org.opensearch.ml.action.training.TrainingITTests > testTrainingWithoutDataset FAILED
NoNodeAvailableException[None of the configured nodes are available: [{#transport#-1}{UC41zXDpQk6sh8ejFWxEWQ}{127.0.0.1}{127.0.0.1:39887}]]
at org.opensearch.client.transport.TransportClientNodesService.ensureNodesAreAvailable(TransportClientNodesService.java:381)
at org.opensearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:272)
at org.opensearch.client.transport.TransportProxyClient.execute(TransportProxyClient.java:79)
at org.opensearch.client.transport.TransportClient.doExecute(TransportClient.java:484)
at org.opensearch.client.support.AbstractClient.execute(AbstractClient.java:433)
at org.opensearch.client.support.AbstractClient.execute(AbstractClient.java:419)
at org.opensearch.client.support.AbstractClient$IndicesAdmin.execute(AbstractClient.java:1316)
at org.opensearch.client.support.AbstractClient$IndicesAdmin.deleteDataStream(AbstractClient.java:1867)
at org.opensearch.test.TestCluster.wipeAllDataStreams(TestCluster.java:157)
at org.opensearch.test.TestCluster.wipe(TestCluster.java:94)
at org.opensearch.test.OpenSearchIntegTestCase.lambda$beforeInternal$0(OpenSearchIntegTestCase.java:395)
at com.carrotsearch.randomizedtesting.RandomizedContext.runWithPrivateRandomness(RandomizedContext.java:187)
at com.carrotsearch.randomizedtesting.RandomizedContext.runWithPrivateRandomness(RandomizedContext.java:211)
at org.opensearch.test.OpenSearchIntegTestCase.beforeInternal(OpenSearchIntegTestCase.java:403)
at org.opensearch.test.OpenSearchIntegTestCase.setupTestCluster(OpenSearchIntegTestCase.java:2361)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1750)
at com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:972)
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 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.base/java.lang.Thread.run(Thread.java:829)