**Build scan:**
https://gradle-enterprise.elastic.co/s/56ydgs7cr5vyc/tests/:modules:data-streams:yamlRestTest/org.elasticsearch.datastreams.DataStreamsClientYamlTestSuiteIT/test%20%7Bp0=data_stream%2F240_logs_ecs_mappings%2FTest%20Elastic%20Agent%20log%20ECS%20mappings%7D

**Reproduction line:**
```
./gradlew ':modules:data-streams:yamlRestTest' --tests "org.elasticsearch.datastreams.DataStreamsClientYamlTestSuiteIT.test {p0=data_stream/240_logs_ecs_mappings/Test Elastic Agent log ECS mappings}" -Dtests.seed=C0FDAA9DB5113BE3 -Dbuild.snapshot=false -Dtests.jvm.argline="-Dbuild.snapshot=false" -Dtests.locale=es-UY -Dtests.timezone=AET -Druntime.java=20
```

**Applicable branches:**
8.9

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

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.datastreams.DataStreamsClientYamlTestSuiteIT&tests.test=test%20%7Bp0%3Ddata_stream/240_logs_ecs_mappings/Test%20Elastic%20Agent%20log%20ECS%20mappings%7D

**Failure excerpt:**
```
java.lang.AssertionError: Failure at [data_stream/240_logs_ecs_mappings:18]: expected [2xx] status code but api [indices.create_data_stream] returned [400 Bad Request] [{"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"no matching index template found for data stream [logs-generic-default]","stack_trace":"org.elasticsearch.ElasticsearchException$1: no matching index template found for data stream [logs-generic-default]\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.ElasticsearchException.guessRootCauses(ElasticsearchException.java:667)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.ElasticsearchException.generateFailureXContent(ElasticsearchException.java:595)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.rest.RestResponse.build(RestResponse.java:176)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.rest.RestResponse.<init>(RestResponse.java:124)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.rest.RestResponse.<init>(RestResponse.java:103)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.rest.action.RestActionListener.onFailure(RestActionListener.java:55)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.client.internal.node.NodeClient$SafelyWrappedActionListener.onFailure(NodeClient.java:170)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.tasks.TaskManager$1.onFailure(TaskManager.java:217)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations.safeAcceptException(ActionListenerImplementations.java:60)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations.safeOnFailure(ActionListenerImplementations.java:72)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.DelegatingActionListener.onFailure(DelegatingActionListener.java:27)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.support.ContextPreservingActionListener.onFailure(ContextPreservingActionListener.java:39)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations.safeAcceptException(ActionListenerImplementations.java:60)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations.safeOnFailure(ActionListenerImplementations.java:72)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.DelegatingActionListener.onFailure(DelegatingActionListener.java:27)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.support.master.TransportMasterNodeAction$AsyncSingleAction.lambda$doStart$2(TransportMasterNodeAction.java:231)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations$DelegatingResponseActionListener.acceptException(ActionListenerImplementations.java:127)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations.safeAcceptException(ActionListenerImplementations.java:60)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations$DelegatingResponseActionListener.onFailure(ActionListenerImplementations.java:132)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations.safeAcceptException(ActionListenerImplementations.java:60)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations.safeOnFailure(ActionListenerImplementations.java:72)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.DelegatingActionListener.onFailure(DelegatingActionListener.java:27)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.routing.allocation.allocator.AllocationActionListener.lambda$notifyListenerFailed$1(AllocationActionListener.java:52)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.routing.allocation.allocator.AllocationActionListener.executeInContext(AllocationActionListener.java:58)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.routing.allocation.allocator.AllocationActionListener.notifyListenerFailed(AllocationActionListener.java:52)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.routing.allocation.allocator.AllocationActionListener$1.onFailure(AllocationActionListener.java:84)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.AckedClusterStateUpdateTask.onFailure(AckedClusterStateUpdateTask.java:75)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$ExecutionResult.notifyFailure(MasterService.java:975)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$ExecutionResult.onClusterStateUnchanged(MasterService.java:938)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService.executeAndPublishBatch(MasterService.java:245)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$BatchingTaskQueue$Processor.lambda$run$2(MasterService.java:1622)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListener.run(ActionListener.java:382)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$BatchingTaskQueue$Processor.run(MasterService.java:1619)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$5.lambda$doRun$0(MasterService.java:1237)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListener.run(ActionListener.java:382)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$5.doRun(MasterService.java:1216)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:983)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:26)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\n\tat java.base/java.lang.Thread.run(Thread.java:1623)\nCaused by: java.lang.IllegalArgumentException: no matching index template found for data stream [logs-generic-default]\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService.lookupTemplateForDataStream(MetadataCreateDataStreamService.java:307)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService.createDataStream(MetadataCreateDataStreamService.java:221)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService.createDataStream(MetadataCreateDataStreamService.java:168)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService$1.execute(MetadataCreateDataStreamService.java:90)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$UnbatchedExecutor.execute(MasterService.java:550)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService.innerExecuteTasks(MasterService.java:1039)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService.executeTasks(MasterService.java:1004)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService.executeAndPublishBatch(MasterService.java:232)\n\t... 11 more\n"}],"type":"illegal_argument_exception","reason":"no matching index template found for data stream [logs-generic-default]","stack_trace":"java.lang.IllegalArgumentException: no matching index template found for data stream [logs-generic-default]\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService.lookupTemplateForDataStream(MetadataCreateDataStreamService.java:307)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService.createDataStream(MetadataCreateDataStreamService.java:221)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService.createDataStream(MetadataCreateDataStreamService.java:168)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService$1.execute(MetadataCreateDataStreamService.java:90)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$UnbatchedExecutor.execute(MasterService.java:550)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService.innerExecuteTasks(MasterService.java:1039)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService.executeTasks(MasterService.java:1004)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService.executeAndPublishBatch(MasterService.java:232)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$BatchingTaskQueue$Processor.lambda$run$2(MasterService.java:1622)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListener.run(ActionListener.java:382)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$BatchingTaskQueue$Processor.run(MasterService.java:1619)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$5.lambda$doRun$0(MasterService.java:1237)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListener.run(ActionListener.java:382)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$5.doRun(MasterService.java:1216)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:983)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:26)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\n\tat java.base/java.lang.Thread.run(Thread.java:1623)\n"},"status":400}]

  at __randomizedtesting.SeedInfo.seed([C0FDAA9DB5113BE3:48A995471BED561B]:0)
  at org.elasticsearch.test.rest.yaml.ESClientYamlSuiteTestCase.executeSection(ESClientYamlSuiteTestCase.java:572)
  at org.elasticsearch.test.rest.yaml.ESClientYamlSuiteTestCase.test(ESClientYamlSuiteTestCase.java:515)
  at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
  at java.lang.reflect.Method.invoke(Method.java:578)
  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:48)
  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:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:843)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:490)
  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:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:850)
  at java.lang.Thread.run(Thread.java:1623)

  Caused by: java.lang.AssertionError: expected [2xx] status code but api [indices.create_data_stream] returned [400 Bad Request] [{"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"no matching index template found for data stream [logs-generic-default]","stack_trace":"org.elasticsearch.ElasticsearchException$1: no matching index template found for data stream [logs-generic-default]\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.ElasticsearchException.guessRootCauses(ElasticsearchException.java:667)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.ElasticsearchException.generateFailureXContent(ElasticsearchException.java:595)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.rest.RestResponse.build(RestResponse.java:176)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.rest.RestResponse.<init>(RestResponse.java:124)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.rest.RestResponse.<init>(RestResponse.java:103)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.rest.action.RestActionListener.onFailure(RestActionListener.java:55)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.client.internal.node.NodeClient$SafelyWrappedActionListener.onFailure(NodeClient.java:170)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.tasks.TaskManager$1.onFailure(TaskManager.java:217)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations.safeAcceptException(ActionListenerImplementations.java:60)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations.safeOnFailure(ActionListenerImplementations.java:72)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.DelegatingActionListener.onFailure(DelegatingActionListener.java:27)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.support.ContextPreservingActionListener.onFailure(ContextPreservingActionListener.java:39)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations.safeAcceptException(ActionListenerImplementations.java:60)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations.safeOnFailure(ActionListenerImplementations.java:72)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.DelegatingActionListener.onFailure(DelegatingActionListener.java:27)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.support.master.TransportMasterNodeAction$AsyncSingleAction.lambda$doStart$2(TransportMasterNodeAction.java:231)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations$DelegatingResponseActionListener.acceptException(ActionListenerImplementations.java:127)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations.safeAcceptException(ActionListenerImplementations.java:60)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations$DelegatingResponseActionListener.onFailure(ActionListenerImplementations.java:132)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations.safeAcceptException(ActionListenerImplementations.java:60)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListenerImplementations.safeOnFailure(ActionListenerImplementations.java:72)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.DelegatingActionListener.onFailure(DelegatingActionListener.java:27)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.routing.allocation.allocator.AllocationActionListener.lambda$notifyListenerFailed$1(AllocationActionListener.java:52)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.routing.allocation.allocator.AllocationActionListener.executeInContext(AllocationActionListener.java:58)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.routing.allocation.allocator.AllocationActionListener.notifyListenerFailed(AllocationActionListener.java:52)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.routing.allocation.allocator.AllocationActionListener$1.onFailure(AllocationActionListener.java:84)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.AckedClusterStateUpdateTask.onFailure(AckedClusterStateUpdateTask.java:75)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$ExecutionResult.notifyFailure(MasterService.java:975)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$ExecutionResult.onClusterStateUnchanged(MasterService.java:938)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService.executeAndPublishBatch(MasterService.java:245)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$BatchingTaskQueue$Processor.lambda$run$2(MasterService.java:1622)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListener.run(ActionListener.java:382)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$BatchingTaskQueue$Processor.run(MasterService.java:1619)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$5.lambda$doRun$0(MasterService.java:1237)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListener.run(ActionListener.java:382)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$5.doRun(MasterService.java:1216)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:983)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:26)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\n\tat java.base/java.lang.Thread.run(Thread.java:1623)\nCaused by: java.lang.IllegalArgumentException: no matching index template found for data stream [logs-generic-default]\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService.lookupTemplateForDataStream(MetadataCreateDataStreamService.java:307)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService.createDataStream(MetadataCreateDataStreamService.java:221)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService.createDataStream(MetadataCreateDataStreamService.java:168)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService$1.execute(MetadataCreateDataStreamService.java:90)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$UnbatchedExecutor.execute(MasterService.java:550)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService.innerExecuteTasks(MasterService.java:1039)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService.executeTasks(MasterService.java:1004)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService.executeAndPublishBatch(MasterService.java:232)\n\t... 11 more\n"}],"type":"illegal_argument_exception","reason":"no matching index template found for data stream [logs-generic-default]","stack_trace":"java.lang.IllegalArgumentException: no matching index template found for data stream [logs-generic-default]\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService.lookupTemplateForDataStream(MetadataCreateDataStreamService.java:307)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService.createDataStream(MetadataCreateDataStreamService.java:221)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService.createDataStream(MetadataCreateDataStreamService.java:168)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.metadata.MetadataCreateDataStreamService$1.execute(MetadataCreateDataStreamService.java:90)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$UnbatchedExecutor.execute(MasterService.java:550)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService.innerExecuteTasks(MasterService.java:1039)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService.executeTasks(MasterService.java:1004)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService.executeAndPublishBatch(MasterService.java:232)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$BatchingTaskQueue$Processor.lambda$run$2(MasterService.java:1622)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListener.run(ActionListener.java:382)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$BatchingTaskQueue$Processor.run(MasterService.java:1619)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$5.lambda$doRun$0(MasterService.java:1237)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.action.ActionListener.run(ActionListener.java:382)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.cluster.service.MasterService$5.doRun(MasterService.java:1216)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:983)\n\tat org.elasticsearch.server@8.9.0/org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:26)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\n\tat java.base/java.lang.Thread.run(Thread.java:1623)\n"},"status":400}]

    at org.junit.Assert.fail(Assert.java:88)
    at org.elasticsearch.test.rest.yaml.section.DoSection.execute(DoSection.java:372)
    at org.elasticsearch.test.rest.yaml.ESClientYamlSuiteTestCase.executeSection(ESClientYamlSuiteTestCase.java:552)
    at org.elasticsearch.test.rest.yaml.ESClientYamlSuiteTestCase.test(ESClientYamlSuiteTestCase.java:515)
    at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
    at java.lang.reflect.Method.invoke(Method.java:578)
    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:48)
    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:390)
    at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:843)
    at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:490)
    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:390)
    at com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:850)
    at java.lang.Thread.run(Thread.java:1623)

```
modules/data-streams/src/javaRestTest/java/org/elasticsearch/datastreams/LogsDataStreamIT.java
/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */
package org.elasticsearch.datastreams;
import org.elasticsearch.client.Request;
import org.elasticsearch.client.ResponseException;
import org.elasticsearch.client.RestClient;
import org.junit.After;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import static org.hamcrest.Matchers.contains;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.matchesRegex;
public class LogsDataStreamIT extends DisabledSecurityDataStreamTestCase {
    @After