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Merged
merged 8 commits into from
Jun 25, 2025
Merged

Make IndexLifecycleService project-aware #129932

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ff3ec37
Make `IndexLifecycleService` project-aware
nielsbauman Jun 18, 2025
6acbb7c
Rename method
nielsbauman Jun 24, 2025
7a95259
Merge branch 'main' into ilm-service-mp
nielsbauman Jun 24, 2025
38297ff
Merge branch 'main' into ilm-service-mp
nielsbauman Jun 24, 2025
6444f6d
Merge branch 'main' into ilm-service-mp
nielsbauman Jun 24, 2025
67e3dba
Remove ILM from multi-project YAML suite
nielsbauman Jun 24, 2025
1e515c8
Merge branch 'main' into ilm-service-mp
nielsbauman Jun 25, 2025
59855ef
Add `NotMultiProjectCapable`
nielsbauman Jun 25, 2025
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127 changes: 67 additions & 60 deletions x-pack/plugin/ilm/src/main/java/org/elasticsearch/xpack/ilm/IndexLifecycleService.java
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,6 @@
import org.elasticsearch.cluster.ProjectState;
import org.elasticsearch.cluster.metadata.IndexMetadata;
import org.elasticsearch.cluster.metadata.LifecycleExecutionState;
import org.elasticsearch.cluster.metadata.Metadata;
import org.elasticsearch.cluster.metadata.ProjectMetadata;
import org.elasticsearch.cluster.metadata.SingleNodeShutdownMetadata;
import org.elasticsearch.cluster.service.ClusterService;
Expand All @@ -28,7 +27,6 @@
import org.elasticsearch.common.scheduler.TimeValueSchedule;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.concurrent.AbstractRunnable;
import org.elasticsearch.core.FixForMultiProject;
import org.elasticsearch.core.Nullable;
import org.elasticsearch.core.SuppressForbidden;
import org.elasticsearch.core.TimeValue;
Expand Down Expand Up @@ -183,9 +181,12 @@ public ProjectMetadata moveIndicesToPreviouslyFailedStep(ProjectMetadata current
void onMaster(ClusterState clusterState) {
maybeScheduleJob();

// TODO multi-project: this probably needs a per-project iteration
@FixForMultiProject
final ProjectState state = clusterState.projectState(Metadata.DEFAULT_PROJECT_ID);
for (var projectId : clusterState.metadata().projects().keySet()) {
onMaster(clusterState.projectState(projectId));
}
}

void onMaster(ProjectState state) {
final ProjectMetadata projectMetadata = state.metadata();
final IndexLifecycleMetadata currentMetadata = projectMetadata.custom(IndexLifecycleMetadata.TYPE);
if (currentMetadata != null) {
Expand Down Expand Up @@ -416,20 +417,21 @@ public void applyClusterState(ClusterChangedEvent event) {
return;
}

@FixForMultiProject
final IndexLifecycleMetadata ilmMetadata = event.state()
.metadata()
.getProject(Metadata.DEFAULT_PROJECT_ID)
.custom(IndexLifecycleMetadata.TYPE);
if (ilmMetadata == null) {
return;
}
final IndexLifecycleMetadata previousIlmMetadata = event.previousState()
.metadata()
.getProject(Metadata.DEFAULT_PROJECT_ID)
.custom(IndexLifecycleMetadata.TYPE);
if (event.previousState().nodes().isLocalNodeElectedMaster() == false || ilmMetadata != previousIlmMetadata) {
policyRegistry.update(ilmMetadata);
// We're updating the policy registry cache here, which doesn't actually work with multiple projects because the policies from one
// project would overwrite the polices from another project. However, since we're not planning on running ILM in a multi-project
// cluster, we can ignore this.
Comment on lines +422 to +424
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@nielsbauman nielsbauman Jun 24, 2025

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I plan to add an annotation and use it here before I merge this PR.

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@PeteGillinElastic PeteGillinElastic Jun 24, 2025

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I wonder whether we could also assert that there's only one project? I would feel more comfortable knowing that a test would probably fail if we ever used the ILM plugin in a multi-project cluster, as well has having the annotation to help us remember.

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@nielsbauman nielsbauman Jun 24, 2025

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I thought of an assertion too, but the IndexTemplateRegistry already installs multiple ILM polices in every project, so an assertion here would already trip.

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@nielsbauman nielsbauman Jun 24, 2025

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Also, I tried running the ILM Java REST tests and those do fail because of this (although it's not directly apparent from the failure that it's because of this registry cache).

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@PeteGillinElastic PeteGillinElastic Jun 24, 2025

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But I thought that this entire module was excluded in serverless, so this code simply doesn't exist there.

If the issue is just that we're tripping integration tests which have multiple projects but don't exclude this module like serverless does... we could fix that?

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@PeteGillinElastic PeteGillinElastic Jun 24, 2025

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I haven't thought about this deeply and it may not be possible, but I'd quite like to understand why if not.

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@nielsbauman nielsbauman Jun 24, 2025

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If the issue is just that we're tripping integration tests which have multiple projects but don't exclude this module like serverless does... we could fix that?

Yep, that's exactly what happens. All tests that make use of the DEFAULT distribution type will trip this assertion. We might not need to run all of these tests in MP mode, but probably a significant portion of them we do - more than we can easily convert for this PR at least.

for (var project : event.state().metadata().projects().values()) {
final IndexLifecycleMetadata ilmMetadata = project.custom(IndexLifecycleMetadata.TYPE);
if (ilmMetadata == null) {
continue;
}
final var previousProject = event.previousState().metadata().projects().get(project.id());
final IndexLifecycleMetadata previousIlmMetadata = previousProject == null
? null
: previousProject.custom(IndexLifecycleMetadata.TYPE);
if (event.previousState().nodes().isLocalNodeElectedMaster() == false || ilmMetadata != previousIlmMetadata) {
policyRegistry.update(ilmMetadata);
}
}
}

Expand Down Expand Up @@ -461,10 +463,13 @@ public boolean policyExists(String policyId) {
* @param clusterState the current cluster state
* @param fromClusterStateChange whether things are triggered from the cluster-state-listener or the scheduler
*/
@FixForMultiProject
void triggerPolicies(ClusterState clusterState, boolean fromClusterStateChange) {
@FixForMultiProject
final var state = clusterState.projectState(Metadata.DEFAULT_PROJECT_ID);
for (var projectId : clusterState.metadata().projects().keySet()) {
triggerPolicies(clusterState.projectState(projectId), fromClusterStateChange);
}
}

void triggerPolicies(ProjectState state, boolean fromClusterStateChange) {
final var projectMetadata = state.metadata();
IndexLifecycleMetadata currentMetadata = projectMetadata.custom(IndexLifecycleMetadata.TYPE);

Expand Down Expand Up @@ -585,51 +590,54 @@ PolicyStepsRegistry getPolicyRegistry() {
return policyRegistry;
}

static Set<String> indicesOnShuttingDownNodesInDangerousStep(ClusterState state, String nodeId) {
static boolean indicesOnShuttingDownNodesInDangerousStep(ClusterState state, String nodeId) {
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@PeteGillinElastic PeteGillinElastic Jun 24, 2025

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I think that this needs a different name, since you're changing the return value. Previously, IIUC, it was returning a set of indices preventing shutdown, and it would consider it safe to shutdown if that was empty. Now it's directly returning whether that set is empty, and therefore whether it's safe to shutdown, right? The method name doesn't indicate this at all.

If it's easier to name the opposite of this method, rather than the method itself, it might even be worth inverting the sense for readability.

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@nielsbauman nielsbauman Jun 24, 2025

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Good point, how about areIndicesOnShuttingDownNodesInDangerousStep?

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@PeteGillinElastic PeteGillinElastic Jun 24, 2025

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Yeah, something like that. Although I find the OnShuttingDown in the middle a bit confusing. (To be honest, I find it a bit confusing in the current name.) Is the point that it would be dangerous to shut down while they're in these steps? Is so, something like hasIndicesInDangerousStepForShutdown might read more naturally???

(It's a private method — or rather, it's visible only for testing — so don't sweat this too much!)

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@nielsbauman nielsbauman Jun 24, 2025

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Yes, the point is that it would be dangerous to shut down the node on which these indices are (that are in a dangerous step). So I went with hasIndicesInDangerousStepForNodeShutdown, to indicate that it's about node shutdown.

final Set<String> shutdownNodes = PluginShutdownService.shutdownTypeNodes(
state,
SingleNodeShutdownMetadata.Type.REMOVE,
SingleNodeShutdownMetadata.Type.SIGTERM,
SingleNodeShutdownMetadata.Type.REPLACE
);
if (shutdownNodes.isEmpty()) {
return Set.of();
return true;
}

// Returning a set of strings will cause weird behavior with multiple projects
@FixForMultiProject
Set<String> indicesPreventingShutdown = state.metadata()
.projects()
.values()
.stream()
.flatMap(project -> project.indices().entrySet().stream())
// Filter out to only consider managed indices
.filter(indexToMetadata -> Strings.hasText(indexToMetadata.getValue().getLifecyclePolicyName()))
// Only look at indices in the shrink action
.filter(indexToMetadata -> ShrinkAction.NAME.equals(indexToMetadata.getValue().getLifecycleExecutionState().action()))
// Only look at indices on a step that may potentially be dangerous if we removed the node
.filter(indexToMetadata -> {
String step = indexToMetadata.getValue().getLifecycleExecutionState().step();
return SetSingleNodeAllocateStep.NAME.equals(step)
|| CheckShrinkReadyStep.NAME.equals(step)
|| ShrinkStep.NAME.equals(step)
|| ShrunkShardsAllocatedStep.NAME.equals(step);
})
// Only look at indices where the node picked for the shrink is the node marked as shutting down
.filter(indexToMetadata -> {
String nodePicked = indexToMetadata.getValue()
.getSettings()
.get(IndexMetadata.INDEX_ROUTING_REQUIRE_GROUP_SETTING.getKey() + "_id");
return nodeId.equals(nodePicked);
})
.map(Map.Entry::getKey)
.collect(Collectors.toSet());
logger.trace(
"with nodes marked as shutdown for removal {}, indices {} are preventing shutdown",
shutdownNodes,
indicesPreventingShutdown
);
return indicesPreventingShutdown;
boolean result = true;
for (var project : state.metadata().projects().values()) {
Set<String> indicesPreventingShutdown = project.indices()
.entrySet()
.stream()
// Filter out to only consider managed indices
.filter(indexToMetadata -> Strings.hasText(indexToMetadata.getValue().getLifecyclePolicyName()))
// Only look at indices in the shrink action
.filter(indexToMetadata -> ShrinkAction.NAME.equals(indexToMetadata.getValue().getLifecycleExecutionState().action()))
// Only look at indices on a step that may potentially be dangerous if we removed the node
.filter(indexToMetadata -> {
String step = indexToMetadata.getValue().getLifecycleExecutionState().step();
return SetSingleNodeAllocateStep.NAME.equals(step)
|| CheckShrinkReadyStep.NAME.equals(step)
|| ShrinkStep.NAME.equals(step)
|| ShrunkShardsAllocatedStep.NAME.equals(step);
})
// Only look at indices where the node picked for the shrink is the node marked as shutting down
.filter(indexToMetadata -> {
String nodePicked = indexToMetadata.getValue()
.getSettings()
.get(IndexMetadata.INDEX_ROUTING_REQUIRE_GROUP_SETTING.getKey() + "_id");
return nodeId.equals(nodePicked);
})
.map(Map.Entry::getKey)
.collect(Collectors.toSet());
logger.trace(
"with nodes marked as shutdown for removal {}, indices {} in project {} are preventing shutdown",
shutdownNodes,
indicesPreventingShutdown,
project.id()
);
if (indicesPreventingShutdown.isEmpty() == false) {
result = false;
}
}
return result;
}

@Override
Expand All @@ -641,8 +649,7 @@ public boolean safeToShutdown(String nodeId, SingleNodeShutdownMetadata.Type shu
case REPLACE:
case REMOVE:
case SIGTERM:
Set<String> indices = indicesOnShuttingDownNodesInDangerousStep(clusterService.state(), nodeId);
return indices.isEmpty();
return indicesOnShuttingDownNodesInDangerousStep(clusterService.state(), nodeId);
default:
throw new IllegalArgumentException("unknown shutdown type: " + shutdownType);
}
Expand Down
70 changes: 30 additions & 40 deletions x-pack/plugin/ilm/src/test/java/org/elasticsearch/xpack/ilm/IndexLifecycleServiceTests.java
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@
import org.elasticsearch.cluster.metadata.LifecycleExecutionState;
import org.elasticsearch.cluster.metadata.Metadata;
import org.elasticsearch.cluster.metadata.NodesShutdownMetadata;
import org.elasticsearch.cluster.metadata.ProjectMetadata;
import org.elasticsearch.cluster.metadata.SingleNodeShutdownMetadata;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.node.DiscoveryNodeUtils;
Expand Down Expand Up @@ -169,13 +170,11 @@ public void testStoppedModeSkip() {
.numberOfReplicas(randomIntBetween(0, 5))
.build();
Map<String, IndexMetadata> indices = Map.of(index.getName(), indexMetadata);
Metadata metadata = Metadata.builder()
var project = ProjectMetadata.builder(randomProjectIdOrDefault())
.putCustom(IndexLifecycleMetadata.TYPE, new IndexLifecycleMetadata(policyMap, OperationMode.STOPPED))
.indices(indices)
.persistentSettings(settings(IndexVersion.current()).build())
.build();
.indices(indices);
ClusterState currentState = ClusterState.builder(ClusterName.DEFAULT)
.metadata(metadata)
.putProjectMetadata(project)
.nodes(DiscoveryNodes.builder().localNodeId(nodeId).masterNodeId(nodeId).add(masterNode).build())
.build();
ClusterChangedEvent event = new ClusterChangedEvent("_source", currentState, ClusterState.EMPTY_STATE);
Expand Down Expand Up @@ -208,13 +207,11 @@ public void testRequestedStopOnShrink() {
.numberOfReplicas(randomIntBetween(0, 5))
.build();
Map<String, IndexMetadata> indices = Map.of(index.getName(), indexMetadata);
Metadata metadata = Metadata.builder()
var project = ProjectMetadata.builder(randomProjectIdOrDefault())
.putCustom(IndexLifecycleMetadata.TYPE, new IndexLifecycleMetadata(policyMap, OperationMode.STOPPING))
.indices(indices)
.persistentSettings(settings(IndexVersion.current()).build())
.build();
.indices(indices);
ClusterState currentState = ClusterState.builder(ClusterName.DEFAULT)
.metadata(metadata)
.putProjectMetadata(project)
.nodes(DiscoveryNodes.builder().localNodeId(nodeId).masterNodeId(nodeId).add(masterNode).build())
.build();

Expand Down Expand Up @@ -264,13 +261,11 @@ private void verifyCanStopWithStep(String stoppableStep) {
.numberOfReplicas(randomIntBetween(0, 5))
.build();
Map<String, IndexMetadata> indices = Map.of(index.getName(), indexMetadata);
Metadata metadata = Metadata.builder()
var project = ProjectMetadata.builder(randomProjectIdOrDefault())
.putCustom(IndexLifecycleMetadata.TYPE, new IndexLifecycleMetadata(policyMap, OperationMode.STOPPING))
.indices(indices)
.persistentSettings(settings(IndexVersion.current()).build())
.build();
.indices(indices);
ClusterState currentState = ClusterState.builder(ClusterName.DEFAULT)
.metadata(metadata)
.putProjectMetadata(project)
.nodes(DiscoveryNodes.builder().localNodeId(nodeId).masterNodeId(nodeId).add(masterNode).build())
.build();

Expand Down Expand Up @@ -312,13 +307,11 @@ public void testRequestedStopOnSafeAction() {
.numberOfReplicas(randomIntBetween(0, 5))
.build();
Map<String, IndexMetadata> indices = Map.of(index.getName(), indexMetadata);
Metadata metadata = Metadata.builder()
var project = ProjectMetadata.builder(randomProjectIdOrDefault())
.putCustom(IndexLifecycleMetadata.TYPE, new IndexLifecycleMetadata(policyMap, OperationMode.STOPPING))
.indices(indices)
.persistentSettings(settings(IndexVersion.current()).build())
.build();
.indices(indices);
ClusterState currentState = ClusterState.builder(ClusterName.DEFAULT)
.metadata(metadata)
.putProjectMetadata(project)
.nodes(DiscoveryNodes.builder().localNodeId(nodeId).masterNodeId(nodeId).add(masterNode).build())
.build();

Expand Down Expand Up @@ -429,11 +422,9 @@ public void doTestExceptionStillProcessesOtherIndices(boolean useOnMaster) {
.build();
Map<String, IndexMetadata> indices = Map.of(index1.getName(), i1indexMetadata, index2.getName(), i2indexMetadata);

Metadata metadata = Metadata.builder()
var project = ProjectMetadata.builder(randomProjectIdOrDefault())
.putCustom(IndexLifecycleMetadata.TYPE, new IndexLifecycleMetadata(policyMap, OperationMode.RUNNING))
.indices(indices)
.persistentSettings(settings(IndexVersion.current()).build())
.build();
.indices(indices);

Settings settings = Settings.builder().put(LifecycleSettings.LIFECYCLE_POLL_INTERVAL, "1s").build();
var clusterSettings = new ClusterSettings(
Expand All @@ -443,7 +434,7 @@ public void doTestExceptionStillProcessesOtherIndices(boolean useOnMaster) {
ClusterService clusterService = ClusterServiceUtils.createClusterService(threadPool, clusterSettings);
DiscoveryNode node = clusterService.localNode();
ClusterState currentState = ClusterState.builder(ClusterName.DEFAULT)
.metadata(metadata)
.putProjectMetadata(project)
.nodes(DiscoveryNodes.builder().add(node).masterNodeId(node.getId()).localNodeId(node.getId()))
.build();
ClusterServiceUtils.setState(clusterService, currentState);
Expand Down Expand Up @@ -539,9 +530,10 @@ public void testIndicesOnShuttingDownNodesInDangerousStep() {
SingleNodeShutdownMetadata.Type.SIGTERM,
SingleNodeShutdownMetadata.Type.REPLACE
)) {
ClusterState state = ClusterState.builder(ClusterName.DEFAULT).build();
assertThat(IndexLifecycleService.indicesOnShuttingDownNodesInDangerousStep(state, "regular_node"), equalTo(Set.of()));
assertThat(IndexLifecycleService.indicesOnShuttingDownNodesInDangerousStep(state, "shutdown_node"), equalTo(Set.of()));
final var project = ProjectMetadata.builder(randomProjectIdOrDefault()).build();
ClusterState state = ClusterState.builder(ClusterName.DEFAULT).putProjectMetadata(project).build();
assertThat(IndexLifecycleService.indicesOnShuttingDownNodesInDangerousStep(state, "regular_node"), equalTo(true));
assertThat(IndexLifecycleService.indicesOnShuttingDownNodesInDangerousStep(state, "shutdown_node"), equalTo(true));

IndexMetadata nonDangerousIndex = IndexMetadata.builder("no_danger")
.settings(settings(IndexVersion.current()).put(LifecycleSettings.LIFECYCLE_NAME, "mypolicy"))
Expand Down Expand Up @@ -583,14 +575,12 @@ public void testIndicesOnShuttingDownNodesInDangerousStep() {
.build();
Map<String, IndexMetadata> indices = Map.of("no_danger", nonDangerousIndex, "danger", dangerousIndex);

Metadata metadata = Metadata.builder()
.putCustom(IndexLifecycleMetadata.TYPE, new IndexLifecycleMetadata(Map.of(), OperationMode.RUNNING))
.indices(indices)
.persistentSettings(settings(IndexVersion.current()).build())
.build();

state = ClusterState.builder(ClusterName.DEFAULT)
.metadata(metadata)
.putProjectMetadata(
ProjectMetadata.builder(project)
.putCustom(IndexLifecycleMetadata.TYPE, new IndexLifecycleMetadata(Map.of(), OperationMode.RUNNING))
.indices(indices)
)
.nodes(
DiscoveryNodes.builder()
.localNodeId(nodeId)
Expand All @@ -613,8 +603,8 @@ public void testIndicesOnShuttingDownNodesInDangerousStep() {
.build();

// No danger yet, because no node is shutting down
assertThat(IndexLifecycleService.indicesOnShuttingDownNodesInDangerousStep(state, "regular_node"), equalTo(Set.of()));
assertThat(IndexLifecycleService.indicesOnShuttingDownNodesInDangerousStep(state, "shutdown_node"), equalTo(Set.of()));
assertThat(IndexLifecycleService.indicesOnShuttingDownNodesInDangerousStep(state, "regular_node"), equalTo(true));
assertThat(IndexLifecycleService.indicesOnShuttingDownNodesInDangerousStep(state, "shutdown_node"), equalTo(true));

state = ClusterState.builder(state)
.metadata(
Expand All @@ -638,12 +628,12 @@ public void testIndicesOnShuttingDownNodesInDangerousStep() {
)
.build();

assertThat(IndexLifecycleService.indicesOnShuttingDownNodesInDangerousStep(state, "regular_node"), equalTo(Set.of()));
assertThat(IndexLifecycleService.indicesOnShuttingDownNodesInDangerousStep(state, "regular_node"), equalTo(true));
// No danger, because this is a "RESTART" type shutdown
assertThat(
"restart type shutdowns are not considered dangerous",
IndexLifecycleService.indicesOnShuttingDownNodesInDangerousStep(state, "shutdown_node"),
equalTo(Set.of())
equalTo(true)
);

final String targetNodeName = type == SingleNodeShutdownMetadata.Type.REPLACE ? randomAlphaOfLengthBetween(10, 20) : null;
Expand Down Expand Up @@ -673,7 +663,7 @@ public void testIndicesOnShuttingDownNodesInDangerousStep() {
.build();

// The dangerous index should be calculated as being in danger now
assertThat(IndexLifecycleService.indicesOnShuttingDownNodesInDangerousStep(state, "shutdown_node"), equalTo(Set.of("danger")));
assertThat(IndexLifecycleService.indicesOnShuttingDownNodesInDangerousStep(state, "shutdown_node"), equalTo(false));
}
}
}
5 changes: 0 additions & 5 deletions x-pack/qa/multi-project/xpack-rest-tests-with-multiple-projects/build.gradle
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Original file line number Diff line number Diff line change
Expand Up @@ -48,12 +48,7 @@ tasks.named("yamlRestTest").configure {
'^esql/191_lookup_join_text/*',
'^esql/192_lookup_join_on_aliases/*',
'^health/10_usage/*',
'^ilm/10_basic/Test Undeletable Policy In Use',
'^ilm/20_move_to_step/*',
'^ilm/30_retry/*',
'^ilm/60_operation_mode/*',
'^ilm/60_remove_policy_for_index/*',
'^ilm/70_downsampling/*',
'^ilm/80_health/*',
'^logsdb/10_usage/*',
'^migrate/10_reindex/*',
Expand Down