diff --git a/docs/changelog/124107.yaml b/docs/changelog/124107.yaml
new file mode 100644
index 000000000000..65b3a857639d
--- /dev/null
+++ b/docs/changelog/124107.yaml
@@ -0,0 +1,6 @@
+pr: 124107
+summary: Avoid hoarding cluster state references during rollover
+area: Indices APIs
+type: bug
+issues:
+ - 123893
diff --git a/server/src/main/java/org/elasticsearch/action/admin/indices/rollover/LazyRolloverAction.java b/server/src/main/java/org/elasticsearch/action/admin/indices/rollover/LazyRolloverAction.java
index 7917c311f7c3..1fecfc3b7037 100644
--- a/server/src/main/java/org/elasticsearch/action/admin/indices/rollover/LazyRolloverAction.java
+++ b/server/src/main/java/org/elasticsearch/action/admin/indices/rollover/LazyRolloverAction.java
@@ -36,7 +36,6 @@ import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.cluster.service.MasterServiceTaskQueue;
 import org.elasticsearch.common.Priority;
 import org.elasticsearch.common.Strings;
-import org.elasticsearch.common.collect.Iterators;
 import org.elasticsearch.injection.guice.Inject;
 import org.elasticsearch.tasks.CancellableTask;
 import org.elasticsearch.tasks.Task;
@@ -189,7 +188,7 @@ public final class LazyRolloverAction extends ActionType<RolloverResponse> {
         @Override
         public ClusterState execute(BatchExecutionContext<LazyRolloverTask> batchExecutionContext) {
             final var listener = new AllocationActionMultiListener<RolloverResponse>(threadPool.getThreadContext());
-            final var results = new ArrayList<MetadataRolloverService.RolloverResult>(batchExecutionContext.taskContexts().size());
+            final var results = new ArrayList<String>(batchExecutionContext.taskContexts().size());
             var state = batchExecutionContext.initialState();
             Map<ProjectId, Map<RolloverRequest, List<TaskContext<LazyRolloverTask>>>> groupedRequests = new HashMap<>();
             for (final var taskContext : batchExecutionContext.taskContexts()) {
@@ -214,14 +213,7 @@ public final class LazyRolloverAction extends ActionType<RolloverResponse> {
 
             if (state != batchExecutionContext.initialState()) {
                 var reason = new StringBuilder();
-                Strings.collectionToDelimitedStringWithLimit(
-                    (Iterable<String>) () -> Iterators.map(results.iterator(), t -> t.sourceIndexName() + "->" + t.rolloverIndexName()),
-                    ",",
-                    "lazy bulk rollover [",
-                    "]",
-                    1024,
-                    reason
-                );
+                Strings.collectionToDelimitedStringWithLimit(results, ",", "lazy bulk rollover [", "]", 1024, reason);
                 try (var ignored = batchExecutionContext.dropHeadersContext()) {
                     state = allocationService.reroute(state, reason.toString(), listener.reroute());
                 }
@@ -234,7 +226,7 @@ public final class LazyRolloverAction extends ActionType<RolloverResponse> {
         public ClusterState executeTask(
             ProjectState currentState,
             RolloverRequest rolloverRequest,
-            List<MetadataRolloverService.RolloverResult> results,
+            ArrayList<String> results,
             List<TaskContext<LazyRolloverTask>> rolloverTaskContexts,
             AllocationActionMultiListener<RolloverResponse> allocationActionMultiListener
         ) throws Exception {
@@ -271,7 +263,7 @@ public final class LazyRolloverAction extends ActionType<RolloverResponse> {
                 null,
                 isFailureStoreRollover
             );
-            results.add(rolloverResult);
+            results.add(rolloverResult.sourceIndexName() + "->" + rolloverResult.rolloverIndexName());
             logger.trace("lazy rollover result [{}]", rolloverResult);
 
             final var rolloverIndexName = rolloverResult.rolloverIndexName();
diff --git a/server/src/main/java/org/elasticsearch/action/admin/indices/rollover/TransportRolloverAction.java b/server/src/main/java/org/elasticsearch/action/admin/indices/rollover/TransportRolloverAction.java
index 451395dfc75b..eeac384188b1 100644
--- a/server/src/main/java/org/elasticsearch/action/admin/indices/rollover/TransportRolloverAction.java
+++ b/server/src/main/java/org/elasticsearch/action/admin/indices/rollover/TransportRolloverAction.java
@@ -49,7 +49,6 @@ import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.cluster.service.MasterServiceTaskQueue;
 import org.elasticsearch.common.Priority;
 import org.elasticsearch.common.Strings;
-import org.elasticsearch.common.collect.Iterators;
 import org.elasticsearch.common.unit.ByteSizeValue;
 import org.elasticsearch.common.util.concurrent.EsExecutors;
 import org.elasticsearch.core.Nullable;
@@ -494,7 +493,7 @@ public class TransportRolloverAction extends TransportMasterNodeAction<RolloverR
         @Override
         public ClusterState execute(BatchExecutionContext<RolloverTask> batchExecutionContext) {
             final var listener = new AllocationActionMultiListener<RolloverResponse>(threadPool.getThreadContext());
-            final var results = new ArrayList<MetadataRolloverService.RolloverResult>(batchExecutionContext.taskContexts().size());
+            final var results = new ArrayList<String>(batchExecutionContext.taskContexts().size());
             var state = batchExecutionContext.initialState();
             for (final var taskContext : batchExecutionContext.taskContexts()) {
                 try (var ignored = taskContext.captureResponseHeaders()) {
@@ -506,14 +505,7 @@ public class TransportRolloverAction extends TransportMasterNodeAction<RolloverR
 
             if (state != batchExecutionContext.initialState()) {
                 var reason = new StringBuilder();
-                Strings.collectionToDelimitedStringWithLimit(
-                    (Iterable<String>) () -> Iterators.map(results.iterator(), t -> t.sourceIndexName() + "->" + t.rolloverIndexName()),
-                    ",",
-                    "bulk rollover [",
-                    "]",
-                    1024,
-                    reason
-                );
+                Strings.collectionToDelimitedStringWithLimit(results, ",", "bulk rollover [", "]", 1024, reason);
                 try (var ignored = batchExecutionContext.dropHeadersContext()) {
                     state = allocationService.reroute(state, reason.toString(), listener.reroute());
                 }
@@ -525,7 +517,7 @@ public class TransportRolloverAction extends TransportMasterNodeAction<RolloverR
 
         public ClusterState executeTask(
             ClusterState currentState,
-            List<MetadataRolloverService.RolloverResult> results,
+            ArrayList<String> results,
             TaskContext<RolloverTask> rolloverTaskContext,
             AllocationActionMultiListener<RolloverResponse> allocationActionMultiListener
         ) throws Exception {
@@ -596,7 +588,7 @@ public class TransportRolloverAction extends TransportMasterNodeAction<RolloverR
                     rolloverTask.autoShardingResult(),
                     targetFailureStore
                 );
-                results.add(rolloverResult);
+                results.add(rolloverResult.sourceIndexName() + "->" + rolloverResult.rolloverIndexName());
                 logger.trace("rollover result [{}]", rolloverResult);
 
                 final var rolloverIndexName = rolloverResult.rolloverIndexName();